1988 Pontiac 6000 instrument and guage display

TOM47G

MEMBER
1988 PONTIAC 6000
6 CYL
2WD
AUTOMATIC
999,100 MILES

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.

Friday, December 4th, 2009 AT 5:21 AM

1 Reply

MERLIN2021

MECHANIC
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.