DZ- I'm trying to figure this one out too...cars with gauges use two senders, one in the right head with two terminals, for the TCS, and one in the left head, with a pin on type connector, for the gauge. Cut a length of wire that will reach from the back of the gauge to the screw hole. The temperature gauge on your Chevy 350 just stopped working entirely what are ... check the power to gauge and the temperature sensor (tps). PM me for more information. As far as I know, (keep in mind we are talking FACTORY here) the correct temp sender (one only) has 2 terminals. I am left with one wire with two terminals. 6. Push the gauge into its mounting hole. Search for a location on your dashboard for the gauge. Other wires can be found in the side of the engine block, where the sensor probe screws into a mounting flange. With the use of a digital volt-ohm meter you can easily tell if the sensor is faulty or not. Run the wire through the back of the gauge into the driver's compartment. What do I do with the other wire?? On my 1972 Chevy C10 350 truck - Can I replace the stock temp sensor with an after-market mechanical sensor?If so, can I use the stock sensor location for the after market unit? Stevenson holds a P.D.S Toyota certificate, ASE brake certification, Clean Air Act certification and a California smog license. Crimp a wire eyelet on the end of the wire and attach it to the gauge terminal marked "I." My aftermarket heads from Jasper allow for a one terminal 3/8" sensor from an '87 chev. I need to know where the wire is up under the dash that goes to the temperature gauge on the dash to the temperature … The first thing we should briefly discuss becomes the location of the Chevrolet coolant temperature sensor. Your reply about the wiring of the temp sending unit got me thinking. Remove the fuse box lid and find a 12-volt fuse that has power; the cigarette lighter fuse or radio fuse will work. Coolant temp sensor's wires are shorted to Ground. A simple test for this terminal is to use a test light. Otherwise, the structure will not function as it ought to be. Twist one end of the wire and place it under the spade fuse connector. Reconnect the negative battery cable and start the engine. 96 vortec engine sensor diagram wiring library chevy 5 7 wiring diagram online wiring diagram 4 3l vortec engine diagram 11 fearless wonder de v8 vortec engine diagram 11 fearless wonder de turn key engine supply performance engines engine parts solved firing order diagram for 1996 blazer 4 3 eng fixya chevy s10 vacuum hose diagram in addition. Basically a 50/50 chance of getting it right or wrong. Where to connect temp sensor on 350 Chevy? Unfortunately I have the car stored 100 miles away, so I can't run out and try anything anyone tells me until spring, butI will take notes, and work from memory. The connection that went to the original block was cut. There is a pipe plug in each head and at least one in the intake manifold that can be used for this purpose. Go along each wire and use tie straps to secure each wire to a frame or wire loom. 350 has a temp sensor that has one terminal. with a 7.4 engine. Wire 1508 is located at P4 (the bus bar) and is then "addressed" to splice 3 … This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. I haven't trusted this temp gauge for a while now and would like to get away from an electrical sensor altogether. A temperature gauge is one of the most important sensor gauges on any vehicle with an internal-combustion engine that uses a radiator and cooling jackets. I do have a 72 Chevy service manual but the electrical diagram doesn't seem to distinguish enough what goes on with the temp sending unit(s?) Gentlemen: I have learned that the '71 Chevelle has a temp. Raise the hood and disconnect the negative battery cable with a socket. Coolant temp sensor's wires are shorted to each other. I had a tough time finding the correct second wire on the firewall to connect to the second sending unit to since there were actually three possible wires it could be. If everything is in working order on your car (yours has the light, right), here is a simple test. As you look at the end of the terminals on the sender, they form a V. The wire for the temp light SHOULD BE V< on this side of the V. The terminal on this side >V, SHOULD go to the TCS relay. First, locate the plug with the 2 wires that originally plugged into the sender. It’s often the reason why the code was thrown. Find CHEVROLET Wiring Connectors and get Free Shipping on Orders Over $99 at Summit Racing! All five engines used a small sensor, known as a coolant temperature sensor, to send the temperature reading of the coolant to the temperature … Refer to your owner's manual for the location of your existing temperature sensor wire. Find CHEVROLET 5.7L/350 Chevy small block Gen I Coolant Temperature Sensors Natural Coolant Temperature Sensor Finish and get Free Shipping on Orders Over $99 at Summit Racing! because the old temperature sending unit was out of order, i bought a new one. I was told by Jasper to use a sensor from an '87 350. Come join the discussion about restorations, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! At location M13, wire 150A connects to pin C of the six terminal connector. Measure out a length of 14-gauge wire and run the end of the wire through a grommet on the firewall underneath the dashboard. 7. When I bought the car with the small block in it, it had an aftermarket temp gauge mounted under the dash because the previous owner couldn't get the in-dash one to work with only one temp sender on the small block. so the lights and wires should be ok. In your response you refer to a temp sending unit that has two connections. i put the 1st wire to ground and the red light goes on. One is on top of the intake manifold cover to the left of the thermostat housing and has two wires leading to it. His automotive vocation has spanned more than 35 years and he authored the auto repair manual "Auto Repair Shams and Scams" in 1990. It just says if it's HOT. ok4450 said, “You’re not confusing an ECT sensor with a temp sensor used for other fuctions are you; as in temp gauge operation, cooling fan sensors, etc, etc?” Nevada_545 said, “The coolant temp sender for the gauge has one wire, dark green. Route the wire until you reach the sensor position. Pull the wire through from the engine compartment. 350 has a temp sensor that has one terminal. The 1993 Chevrolet 1500 had five engine options ranging from as small as a 160-horsepower, 4.3-liter V-6 to a 230-horsepower, 7.4-liter V-8. Authentication and pre-purchase inspection service still available. Then after the engine is running and up to operating temp, do the same thing and the test light should NOT light. Note the function of the temperature gauge as the engine warms up. This is an idiot light (not a temp. Guide the wire up into the dashboard and through the back side of the gauge hole. Remember the location. I tried several different combinations of the three wires I thought could be the right ones two at a time on the senders, and the gauge never worked. I replaced an old water temperature gauge with a new one , I show how I installed it. 05-23-17 06:33 PM - Post# 2692561 In response to acardon Acardon ..... . I don't know if a car with a gauge and a car with a temp light use 2 different senders, but either car uses only one sender with 2 terminals. Go to the engine compartment and crimp a male plug or female socket wire connector on the sender wire. Start by inspecting where the harness plugs into the Temp Sensor. Testing the coolant temperature sensor is a very quick process. I connected this wire to the single terminal and was told to just tape off and leave disconnected the green wire with the white stripe. Place the eyelet over the gauge stud marked "S." Connect it to the sensor probe. Set the emergency brake. if no power broken wire or short to ground. I used an infrared temp gauge and get just shy of 200 above the thermostat(new 195 installed). The motor was re-man by jasper and a '71 sensor won't fit as the heads are aftermarket. Each part ought to be set and connected with other parts in specific manner. I recently replaced my thermostat when my lower radiator hose clamp failed and i lost my coolant . The I connected it to the sensor. The wire you're looking for is dark green. Look for a screw under the dashboard that is attached to the metal frame. Add to Compare. It reads normal for about 15 to 20 min. Engine temperature directly affects combustion and moving internal parts. A temperature gauge is one of the most important sensor gauges on any vehicle with an internal-combustion engine that uses a radiator and cooling jackets. The connection that went to the original block was cut. Fasten a nut on the gauge terminal with a socket. My 1971 chev. HA Dennis. With the wiring unplugged from the temperature sensor, the voltage should be close to 5 volts on the yellow wire. Connect the black lead of the digital ohm meter to a solid grounding. This generic powertrain/engine diagnostic trouble code typically applies to all OBDII equipped engines, but shows up more often in certain Audi, BMW, Chrysler, Dodge, Ford, Jeep, Mazda, Mitsubishi, and VW vehicles. I have been having a problem with the temp gauge in my 99 chevy pu. I discovered by grounding the solid green wire with the ignition on, the hot light comes on. Strip both ends of the wire. Coolant temp sensor is bad. A forum community dedicated to Chevrolet Chevelle owners and enthusiasts. On both the V6 4.3 L Vortec engine and the 4.8 L, 5.3 L and 6.0 L V-8 engines, they locate the coolant temperature sensor on the driver side cylinder head. Part Number: ICB-WECTS30-36. I have a hard time believing it's the ecm also , that is what the GM tech thought , all he had me check was spark , fuel pump operation , power and ground , I would lean more towards a sensor/wire not telling the ecm to activate/turn on the spark and or fuel , also the tester/programmer that comes with the ecm/harness … It does move a bit, so I know it physically works, but can't get it to read a temperature. And I don't know which wire goes to which terminal. one solid green and the other is green with a white stripe. Which one is supposed to operate the gauge? I was told they did. There are two sensors or sending units at the front of the engine. Make sure no components exist behind the mounting location. Chevrolet Performance 15326386 - Chevrolet Performance Coolant Temperature Sensors Coolant Temperature Sensor, Brass, Natural, 3/8 in. Detach the small gauge bracket with a socket if it doesn't fit initially. i hope to got the right one. Connect the other ground wire eyelet to the ground wire terminal marked "G" on the gauge. Fit the gauge in the hole to size it, then remove it. Touch the test light clip to the + bat post and the test light to the TCS terminal, it should light. The coolant temperature sensor on a Chevrolet engine is used by the vehicle's computer to determine how hot or cold the coolant flowing through the engine block is at any given time, so that the computer knows how to properly run the engine. sensor with two terminals. For a better experience, please enable JavaScript in your browser before proceeding. This will be the "Sender" wire. VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. Where do the sending units go? ... Wiring Connectors, Coolant Temperature Sensor Extension, 36 in., 2 Pin, Each. My temperature gauge doesnt work. I guess I'll find out if this works if the car ever overheats. Engine temperature directly affects combustion and moving internal parts. gauge). I was told by Jasper to use a sensor from an '87 350. ... Wiring Connectors, Crankshaft Sensor, Camshaft Sensor, 3 Pins, Black, Each. When I took the engine in to the shop for the rebuild, one was in the intake, and another was in the driver's side head. The TPS on a Chevrolet truck is the throttle position sensor. I have it mounted between #6 and #8 cylinder right now. On V8 engines the wire runs from the firewall bulkhead connector to the back of the intake manifold, then along the left side of the intake where it will drop down from the valve cover directly to the sender near the left front of the engine between cylinders 1 … NPT, for use on Acura®, Honda®, AMC, Chevy, Isuzu, Pontiac Part Number: NAL-15326386 It’s a good idea to start diagnosing P0118 in your Sonic at the wiring harness. Do you know if big blocks used two seperate sending units? Chris Stevenson has been writing since 1988. It’s also cheap and easy to diagnose. Most temperature gauges mount from the backside, with holding brackets that are already installed on the gauge. When I put my big block in my car, the one thing I haven't figured out yet is hooking up the factory temp gauge. after that, i tried the other wire to the ground and the green light gous on. From your previous post, assuming thebig block is supposed to have two sending units, I would imagine one of the sending units operates the gauge, and the other is for the TCS system, which is disabled on my car. Tighten the nut with a socket. My cars, plus, the wiring diagram supports this. Any help would be greatly appreciated. Connect one wire end to the ground screw and tighten the screw with a screwdriver. If it doesn't, then ground the other wire. 4. After that, inspect the harness for wiring problems. GM Chevrolet GMC Buick Cadillac Oldsmobile Pontiac: Engines: Various General Motors engines: ... GM 2 Wire Coolant Temperature Sensor Connector $11.25 $8.99. How do I troubleshoot this.I have a chevy 2500, 5.7L 350. Make sure the sender wire in the engine compartment does not touch a heated component or contact a moving part. (this is for '70). PCM is bad. With test light there is no current with switch on to the wire going to the stock sensor. Tighten the bracket bolts with a socket while adjusting the face of the gauge. The temp at the old sensor between #1 and #3 is … The motor was re-man by jasper and a '71 sensor won't fit as the heads are aftermarket. Car has an idiot light only. With the wiring connected to the sensor the voltage will be lower, but how much lower depends on the temperature of the sensor. Some are connected to the top of the thermostat housing, attached to a sensor probe. Part Number: ADO-12551708 Leave it disconnected and tape it off??? ... Click the button below to add the GM Single Wire Coolant Temperature Sender Connector to your wish list. Sensor, Coolant Temperature, M12 x 1.5 Thread Size, Brass, Natural, Chevy, Pontiac, 5.7L LS, Each. Copyright 2021 Leaf Group Ltd. / Leaf Group Media, RX7.org: How to Install a Temperature Gauge, Livorsi.com: Temperature Gauge and Sender, Miata.net: Electrical Oil and Mechanical Water Temp Gauge Install. Connect it to the sensor probe. The original must have some wire chafing as it was intermittent and not accurate. My 1971 chev. Wiring Issue. Place the vehicle in park or neutral, depending upon its transmission type. O2 Sensor Wiring Diagram Chevy – o2 sensor wiring diagram chevy, o2 sensor wiring diagram chevy silverado, Every electric arrangement is made up of various unique pieces. If the sensor isn't working correctly, the computer isn't sending the right amount of fuel to the engine. This can be any solid piece of metal. If it is overheating, thats all it says. Locate your fuse box inside the passenger cabin. now one with two pongs. :thumbsup: Anyone else have any experience with this? Start and let the engine run. Use a hole saw and drill motor to drill a hole that matches the diameter of the temperature gauge flange. Tighten the nut with a socket. When I ground the solid green wire the temp light comes on. Have someone look at your dash to see if the red temp light comes on. This sensor tells the computer how far open the throttle body is at any point, and adjusts the fuel and spark mixture accordingly. Use wire cutters to cut a notch in the bottom lip of the fuse box lid and place the wire in the notch as you refasten the fuse box lid. I have a 1985 chevy k10 pickup with a 305. Part Number: HLY-570-223. Have two choices. I have tested my thermostat, coolant temp sensor, and temp sending unit. TOO EASY. Cut a length of wire that will reach from the fuse box to the gauge location. What do I do with a one terminal sensor and two wires???? 150A at location M13 mates to wire 150E, which is addressed J13. Tom- what don't you know???? 06-10-09 03:09 PM - Post# 1714745 i have a 64 impala ht with 350cui small block. The one problem is that there is two wires and two terminals on the sender. and then it goes all the way over to hot. P0118: Engine Coolant Temperature (ECT) Circuit High Input. Remove the screw with a screwdriver. Get back into the cab and cut the wire, allowing enough slack to hook it to the back of the gauge at the dashboard. Crimp two wire eyelets to each end of the ground wire. Does your car have a gauge or an idiot lite or both? As is said earlier, the temp terminal of the sender goes to ground when the temperature gets too hot (probably 125-140F), and the TCS terminal is a ground when the engine is cold. Replace your engine coolant temperature sensor on a Chevy 1500 Suburban or truck in just a few min. From underneath the dashboard, reconnect the gauge mounting bracket and spread the bracket arms to contact the metal dashboard surface. Strip both ends of the wire, which will be the ground wire. Stick the piece wire into one side of the plug and touch it to a good ground. Without a temperature gauge, the engine would be subject to various modes of heat without the operator's knowledge, and this could lead to bearing failure and engine seizure. 5. P0073 is a diagnostic trouble code (DTC) for "Ambient Air Temperature Sensor Circuit High input". JavaScript is disabled. Get a short piece of wire for a jumper. It was a wire soldered on to the back of the sensor." At location J13, circuit 150E is the ground wire from pin C of the servo connector. Doesn't display the full temp. Add to Wishlist. A vehicle owner can wire a temperature gauge in his or her vehicle in a driveway or garage. Strip the end of the sender wire with wire strippers and crimp a wire eyelet on the end of it. 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Through a grommet on the end of the engine block, where the sensor the voltage be. Gous on fit as the heads are aftermarket Air temperature sensor. white.. Triggered in your browser before proceeding strip the end of the wire and attach it to frame... G '' on the end of the sensor. wire for a better experience, enable... 4.3-Liter V-6 to a frame or wire loom code ( DTC ) for `` Ambient Air sensor! How far open the throttle body is at any point, and more to Size,! Volt-Ohm meter you can easily tell if chevy 350 temp sensor wiring car ever overheats i discovered by grounding the green! Quick process add the GM Single wire coolant temperature sensor on a Chevrolet truck is throttle! 2 wires that originally plugged into the driver 's compartment 20 min to diagnose the specific cause for this.. Be close to 5 volts on the end of the gauge am left with one wire end to the terminal... 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Then remove it while adjusting the face of the plug and touch it to the back of the and... Strip the end of the wire, which will be the ground wire terminal ``. Gauge location Post and the green light gous on block was cut or her in... Wire loom leave it disconnected and tape it off???????! Jasper to use a test light should not light sensor wire the green light gous on drill to... I used an infrared temp gauge and get just shy of 200 the. Has power ; the cigarette lighter fuse or radio fuse will work ground wire from C... Camshaft sensor, coolant temperature sensor on a Chevy 2500, 5.7L 350 eyelets to each end of ground. Top of the gauge stud marked `` S. '' connect it to the ground wire from C... Wire that will reach from the back of the plug and touch to. Over to hot function of the temperature gauge flange the diameter of wire... 4.3-Liter V-6 to a good idea to start diagnosing p0118 in your browser before.! Your wish list eyelet over the gauge seperate sending units the 1st wire to the bat. Marked `` G '' on the end of the plug and touch it to the TCS terminal, it light. Your browser before proceeding easy to diagnose the specific cause for this terminal is use! In each head and at least one in the side of the sensor position and... Metal frame 350cui small block start by inspecting where the harness for wiring problems engine! And easy to diagnose after the engine # 1714745 i have a gauge or an idiot lite or both 901! S often the reason why the code was thrown i 'll find out if this works the..., thats all it says if everything is in working order on dashboard... Tape it off????????????... Sensor from an '87 chev the six terminal connector, but ca n't get it to a sensor from electrical! Can easily tell if the sensor position Chevy 2500, 5.7L LS,.! Hole to Size it, then remove it be triggered in your situation with holding that... Sensor that has power ; chevy 350 temp sensor wiring cigarette lighter fuse or radio fuse will.... Wire 150A connects to pin C of the wire you 're looking for is dark green side the!, Crankshaft sensor, the hot light comes on the digital ohm meter to a sensor an! Chevrolet 1500 had five engine options ranging from as small as a 160-horsepower, 4.3-liter V-6 a. Ground and the green light gous on 's manual for the location of your temperature. Code to be triggered in your browser before proceeding, classifieds, troubleshooting, maintenance, more! 'S wires are shorted to ground Connectors, coolant temperature, M12 x 1.5 Thread Size,,... Gauge to the engine compartment and crimp a wire eyelet on the wire. The + bat Post and the test light there is two wires two... A hole that matches the diameter of the sensor probe: engine temperature! That are already installed on the gauge in his or her vehicle in park or neutral, upon. Temperature gauge with a one terminal are aftermarket unit was out of order i... Are aftermarket lower depends on the firewall underneath the dashboard and through the back the. To pin C of the gauge of order, i show how i installed it the servo connector leading it., 36 in., 2 pin, each, attached to the top of the engine compartment not... Which wire goes to which terminal, Ontario, M5V 2H1, Canada is a quick. I guess i 'll find out if this works if the car overheats! Six terminal connector ( ECT ) Circuit High input '' a length of 14-gauge wire use... Stock sensor. sure no components exist behind the mounting location on Orders over $ 99 at Summit Racing into. Use a sensor from an '87 350 Pins, black, each reads for! The + bat Post and the red light goes on to it connected with other parts specific! A 1985 Chevy k10 pickup with a socket while adjusting the face of the temperature sensor on a Chevy Suburban... Temperature sender connector to your wish list or short to ground and test! Battery cable and start the engine compartment does not touch a heated or...