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http://www.steelsoldiers.com/cucv/50551-cucv-switches-diodes-relays.html Look at the 7th picture

According to the diagrams, the bulb has power to it at all times and the "switch" is the last item in the circuit. When it closes the bulb lights. So the bulb is upstream of the switch.

That is what I get for not proof reading before I hit the Submit Button. Yes the "switch" is on the left front of the engine.

The way the high temp lamp works is: With the key on, the pink/black wire (39A) is suppost to be hot (12v). It feeds the idiot lights on the dash. (temp, low coolant, brake and fuel).The power travels thru the bulb to the dark green wire (35B). The green wire passes thru the firewall at the...

Since you are your own supervisor......................... You will have to breakout the voltmeter and start checking the circuits. My first guess will be a bad contact on the circuit board on the intstrument cluster. I have seen many bent/missing/coroded contacts on the clusters I have...

The High temp will come on in the start position. You can trace dark green circuit 35A & 35B in diagram E-3 and E-4 The low coolant light should light for a few seconds when the key is first turned on as a test. It is controled by the low coolant module. It gets it power from the pink/black...