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Re: 85 dual tank gage question
If none of your gauges and lamps are working the first place to look is the ignition power and the ground wires to the cluster.
Ignition power is pinkish red with a black stripe. Look in the wiring diagrams for the fuse that feeds the cluster. It's marked INSTR LPS and it should be 5A. The other fuse to look at is the 20A IGN/GAU but that one will likely cause other issues.
Ground is black.
I've found the main instrument cluster ground unplugged from the buss bar above the parking brake pedal more than once. Easy quick fix.
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1959 M35A2 LDT465-1D SOLD
1967 Dodge W200 B383, NP420/NP201 SOLD
1969 Dodge Polara 500 B383, A833 SOLD
1972 Ford F250 FE390, NP435/NP205 SOLD
1976 Chevy K20, 6.5L, NV4500/NP208 SOLD
1986 M1008 CUCV SOLD
2000 GMC C2500, TD6.5L, NV4500
2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263
2009 Impala SS LS4 V8
RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... Please include at least the year and model in your threads. It'll be easier to answer your questions.
And please let us know if and how your repairs were successful.
Last edited by hatzie; 06-29-2022 at 03:52 PM.
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