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. There is a pipe plug in each head and at least one in the intake manifold that can be used for this purpose. PM me for more information. Remember the location. now one with two pongs. Where do the sending units go? All five engines used a small sensor, known as a coolant temperature sensor, to send the temperature reading of the coolant to the temperature … 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?) Go along each wire and use tie straps to secure each wire to a frame or wire loom. Authentication and pre-purchase inspection service still available. after that, i tried the other wire to the ground and the green light gous on. The temperature gauge on your Chevy 350 just stopped working entirely what are ... check the power to gauge and the temperature sensor (tps). At location M13, wire 150A connects to pin C of the six terminal connector. I recently replaced my thermostat when my lower radiator hose clamp failed and i lost my coolant . ... Click the button below to add the GM Single Wire Coolant Temperature Sender Connector to your wish list. Make sure no components exist behind the mounting location. Connect the black lead of the digital ohm meter to a solid grounding. P0118: Engine Coolant Temperature (ECT) Circuit High Input. The wire you're looking for is dark green. Part Number: ICB-WECTS30-36. Start by inspecting where the harness plugs into the Temp Sensor. 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. Search for a location on your dashboard for the gauge. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Each part ought to be set and connected with other parts in specific manner. Tighten the nut with a socket. Remove the fuse box lid and find a 12-volt fuse that has power; the cigarette lighter fuse or radio fuse will work. Leave it disconnected and tape it off??? Strip both ends of the wire. There are two sensors or sending units at the front of the engine. Detach the small gauge bracket with a socket if it doesn't fit initially. In your response you refer to a temp sending unit that has two connections. My 1971 chev. 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’s a good idea to start diagnosing P0118 in your Sonic at the wiring harness. Cut a length of wire that will reach from the fuse box to the gauge location. Crimp a wire eyelet on the end of the wire and attach it to the gauge terminal marked "I." i hope to got the right one. Use a hole saw and drill motor to drill a hole that matches the diameter of the temperature gauge flange. 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. 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. On the V-8 models it's next to the number one spark plug wire boot. Do you know if big blocks used two seperate sending units? Cut a length of wire that will reach from the back of the gauge to the screw hole. The temp at the old sensor between #1 and #3 is … P0073 is a diagnostic trouble code (DTC) for "Ambient Air Temperature Sensor Circuit High input". Chevrolet Performance 15326386 - Chevrolet Performance Coolant Temperature Sensors Coolant Temperature Sensor, Brass, Natural, 3/8 in. JavaScript is disabled. Wire 1508 is located at P4 (the bus bar) and is then "addressed" to splice 3 … Go to the engine compartment and crimp a male plug or female socket wire connector on the sender wire. 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