Author Topic: Amp gauge discharge  (Read 1325 times)

Offline Breynolds1107

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Amp gauge discharge
« on: January 20, 2019, 04:35:31 PM »
Ok I have 1985 k30 crew truck runs fine with all lights on except dash lights  when I turn on dash lights causes discharge an fuel gauge to drop as soon as I turn dial back it will go back up I have checked grounds and replaced alternator what could the problem be

Offline bd

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Re: Amp gauge discharge
« Reply #1 on: January 20, 2019, 05:58:02 PM »
An 85 K30 should have a voltmeter, not an amp gauge.  Disassemble and burnish the ground connections to shiny bare metal.  Concentrate on the I/P harness connections to the instrument cluster PC board, the ground connections to the park brake frame under the dash at the left kick panel, the braided jumper between the firewall sheet metal and the back of the passenger side cylinder head, and the battery to engine ground cable.  Check the PC board for cracked or peeling foils.  Make sure that none of the I/P harness black ground wires are severed.
Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline Rapid Roy

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Re: Amp gauge discharge
« Reply #2 on: January 20, 2019, 06:11:05 PM »
Welcome
1974 Cheyenne 10 LWB STOCK 350 W HEI /TH350/AC/4 BBL Quadrajet
Mopar by Birth
Chevy by Choice