Reproduction Parts for 1916-1964 Chevrolet Passenger Cars & 1918-1987 Chevrolet & GMC Trucks
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The 29 has an electric temperature gauge. Voltage goes to the gauge and the other wire goes to the sender and is grounded there. The two wiring diagrams I have both show the voltage coming from a post on the light switch that is always hot. Shouldn't it use a source controlled by the ignition switch so the battery isn't drained?
Not being familiar with the 29 electric temp guage (my 38 has a capillary tube type) but I would think you are right even though the current draw would be negligible switched power is the common procedure on all vehicles that I have seen.
Tony
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