1988 Pontiac 6000 instrument and guage display

1988 PONTIAC 6000
999,100 MILES • 6 CYL • 2WD • AUTOMATIC
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TOM47G
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  • 1 POST
The instrument and gage display is blank. I found 10 volts at battery with car running. I installed a new alternator but still no dash display and 10 volts at battery. With engine off battery shows over 12 volts. Fuse for dash lights is good.
Dec 4, 2009 at 5:21 AM
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MERLIN2021
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  • 17,250 POSTS
DISPLAY SWITCH ASSEMBLY TEST 1. Ensure that switch assembly C1 connector is properly connected. Place ignition switch in "RUN" position and "ENGLISH/METRIC" switch in "METRIC" position. 2. Using a voltmeter, measure voltage between Pink/Black wire and ground. If battery voltage is present, go to next step. If not, check Pink and Pink/Black wires for open circuits. 3. Measure voltage between Pink/Black wire and Black/Dark Blue wire. If battery voltage is present, go to next step. If not, check Dark Blue wire for an open circuit. 4. Measure voltage between Gray/Red wire and ground. If battery voltage is present, replace display switch assembly. If not, check Gray/Red wire for an open circuit. 5. Place "ENGLISH/METRIC" switch in "ENGLISH" position. Measure voltage between Pink/Black wire and Gray/Red wire. If battery voltage is present, replace display switch assembly. If not, check Gray/Red wire for an open circuit.
Dec 4, 2009 at 7:00 AM