Does anyone have a complete circuit diagram for the gauge pack? And/or a diagram of the "wiring" runs and component locations? And/or at least a photograph of the board? I have the 78 electrical troubleshooting manual but that is not specific enough to solve this problem.
I have no voltage showing on the voltage gauge and the gen light on but the battery is being charged. Looks to me like a problem with the circuit board, but I hope to figure that out before taking the board out.
After studying them and imagining the worst (a break in a printed circuit), I realized there is a connector on the back of the center gauge printed circuit board. And that there had recently been some work done to connect a new antenna to the radio, right below the connector. Fingers crossed (metaphorically) I took out the glove box, reached in and snapped the loose connector tight.
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