Quote:
Originally Posted by Clint72
Alright, here are a couple pictures of what I found on the harness.
Everything looks to be correct except for the fact that there is a wire coming out of terminal 5 and it's been spliced to a green wire, then two come out of 6 but ones spliced and the other is cut.
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Yeah, definitely looks like someone has been in there monkeying around with the temp gauge wiring.
Seeing as how there are green wires going to both #5 and #6, it is possible that the original owner had troubles with the temperature gauge at some point. And rather than fix the gauge, they took advantage of the fact that the gauge cluster had the provision for a temp light and made some changes to make that light functional.
Also, judging by the color of the wires leading to pins #1 and #12, it does look like the wiring has been converted from warning lights to gauges. The factory gauge cluster wiring used a black wire with a white stripe to pin #1 and a black wire to pin #12 for the ammeter (battery gauge). Yours appears to have brown and blue wires going to those pins (which were likely re-purposed from the old GEN light (brown) and OIL light (blue) wires).
Now, that doesn't necessarily mean that the truck was converted from warning lights to gauges. The other possibility is that the original wiring got damaged and someone swapped in a cab harness from a donor truck that had warning lights (and modified it to work with the gauge cluster).
In any case, getting the temp gauge wiring back to the stock configuration (with the dark green wire from the sending unit connected to pin #6) would be the first step to getting that gauge functional again.