Rally Dash

seitz said
I finially got lights working ended up being the ground screws that hold the board in place had to wire wheel them all to get a good conection that sovle the light issue but still no gauges the all test good with a mulit meter. does the fuel gauge have a wire that is 12v going into harness that feeds it power? also what is volatge in the wores neede dto feed temp and oi gauge?

OK, in the round harness connector the dark blue at top center is to fuel sender. A short distance counterclockwise is a blue with white tracer (about 10 o'clock position). This is 12 volts into the fuel gauge at switch on. This 12 volt supply along with the chassis ground at back of this gauge detailer earlier is all about the internal voltage limiter. The pulse voltage coming from that limiter jumps directly to the fuel gauge inside that gauge. This pulse voltage also comes out of the gauge at another of the posts so the printed circuit board can carry the pulse voltage to the water temp' gauge and the oil pressure gauge. The copper traces on these printed circuit boards are very simple to follow so you should be able to see and understand what I've described here.
And I must say I am so sorry I failed to mention those board mounting screws. I should have and could have saved you some headache. They have what is called a kept washer on them that rest against copper pads beneath. So that is in fact the first link in the daisy chain chassis ground path.
I spent 8 years of my life renewing these gauges and/or entire rally inst' panels before retiring. While in process I would use a water like safety flux (used in solder brass cane around glass, purchased at Hobby Lobby) to clean every brass contact point on the circuit boards. I used a wire brush in a dremel to spin and scrub those kept washers on all board mounting screw. I also cleaned all gauge posts and replaced the stamped tin speedy nuts on gauge posts with real 10-32 hex nuts and internal toothed washers on every gauge post.
Last step was to test every circuit on my workbench and calibrate every gauge to ensure customer satisfaction. I didn't keep a count on anything other that how many fuel gauges I renewed during those 8 years and I forget that now, either 332 or 352.