Trying to figure out why my fuel sender isn't working and discovered this. Any ideas? Some sort of resistor?
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I put a 5” wire shunt on my amp meter for a 65 amp alternatorLooks like some sort of PO wiring hack job to me. Poor job of scraping "Grounds" for the instrument light bulbs. You should be looking for the wiring diagram that correct for your year, model and market. Search around here, there are threads for the amp meter / fuel gauge step down power supply.
For sure PO hacking. I'm replacing the entire harness on my rig as there is evidence of a fire, missing fuses, and now, looks like the cluster. Yay!Just guessing. Appears me that long yellow air is going to one side of your temperature meter. Further - it appears to me that circuit going to that long yellow wire and its bolt - have been physically separated ( open circuit).
The other end of that box has a discolored white/black wire —- that looks like it was soldered to the circuit board. Which just above that solider joint another line was scared into the circuit line.
If your temp gauge works - that box is either pushing the voltage up or down.
That is a mess.
Oh, good find! What function would it serve on the cluster?That looks like an aftermarket 7v regulator. $57 from NAPA so don't toss it.
View attachment 3673749
10 bucks says your version and the above photo a vastly different.My 7v regulator failed years ago and have been using a 7808 3 pin regulator attached to the back of the cluster for several years. 50 cents vs $50.