i tore apart all the gauges and sanded all the contacts. I now have a working fuel gauge (showing 1/2 tank), volt meter, clock, but no oil pressure or engine temp. I'm going to rip it apart again tomorrow and give it another sanding with the dremmel. Is it also true that the brackets on the back are polarity sensitive and only work one way? Also... NONE of my gauge lights work - from the speedo tach to any in the cluster block. any clues?
I have exactly the same problem in my newly aquired 88. One of the reasons I got it cheap.
I found a green fusible link blown, and soldered in a new one. I took apart the bulk head connector, and cleaned it. I took off the fuse box and cleaned all contacts. I found alot of them loose where the fuse plugs into, so I used small needle nose plyers to crush them back together. It worked fairly well.
When I turned on the key, my gas gauge pegged full. I found the tan wire open at the connector to the sending unit, so I soldered it back. The gas gauge works better now, but still the needle moves around like the gas is sloshing around, even though it is not.
Still no temp or oil. The clock works, as well as the volts.
I took the cluster apart, and cleaned things, but still nothing.
I did notice the E-brake does not have those black wires hooked up to the switch. Maybe that is the ground?
I've looked over the wiring diagrams, but can't seem to figure out why the oil and temp both don't register. Let me know if you figure it out.
I'll do the same.
'85 CJ7, BDS 4" lift, 1" Body lift, 33x12.5, Shrockworks Sliders, 304 V8 with RV cam., T-176, D300, Dana 30, AMC 20.
1986 CJ10-A SD-33 Diesel/727/np208
1971 800B with 345/T-19
06' TJ Rubicon, 4" R.C. springs, BFG/AT 35s M.C. 6" fenders, rockers and surrounds, Currie front & rear adj. tracbars, tattons DC rear shaft, adj. upper - lower CA's. Bilstein 5100's
YJ Buggy Build
Current project. Stroker/FI ?
1990 MJ Comanche 4.0L AX15/np231