Hi, I was wondering if there was a common cause for the reserve light on my fuel gauge to turn on and off and just glow yellow sometimes when the fuel needle is on full, 1/2, 3/4.

The needle works great and doesn’t jump around. So I was thinking the sender is ok. The light comes on for a second or two then turns off. Then it is off for a few minutes and turns on a few seconds. All the while the needle is stable.

When I start the car it doesn’t always turn on. I recall it used to turn on when I turned the key but my memory may be wrong.

Just wondering if anyone had any common places to look before I 1) pull and clean the sender, and 2) trace the circuit.

Perhaps there is a relay in there for startup? Or there is electronics? I assumed the light was controlled by a dumb switch in the gauge. Time to whip out my wiring diagrams.

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79 300TD “Old Smokey” AKA “The Mistake” (SOLD)
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