Question about 1989 Pontiac Grand Prix

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Instrument panel goes blank with lights on

When I turn on the park or headlights, the instrument panel goes blank on my 89 Pontiac G. Prix. I have checked for blown fuses but fusing is good. The dash light dimmer switch seems to be ok, it dims and aluminates to high on both radio and compass. Any ideas??? Thx

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The headlights on 97 pontiac sunfire have no power to them. It looks like the ignition has been replaced and the security has been tripped. causing car to pull less power, not run right. Any ideas


Yea, take it to a qualified repair shop ! Could be anything , and with out doing some test couldn't make a suggestions .
Headlights/Daytime Running Lights (DRL) Circuit Description
The instrument cluster controls the headlamp systems that include daytime running lamps (DRL). The system allows the headlamps to operate at a reduced intensity when all of the following conditions apply:
• The engine is running.
• The transaxle is not in the PARK position.
• The normal headlamps are not on.
The instrument cluster turns the DRL system on by grounding CKT 592, thereby energizing the DRL relay. This action allows a reduced voltage of 6 volts to flow across the headlamps. If the vehicle has the optional fog lamps, the fog lamp relay will also be energized. The park lamps will turn on and the fog lamps will operate normally. When the headlamp switch is turned to the ON position, the instrument cluster allows normal headlamp operation.
The instrument cluster also has an input from the park brake. If the park brake is in the ON position, the DRL will remain disabled until the park brake is placed in the OFF position. On vehicles with an automatic transaxle, the instrument cluster will disable the DRL until the transaxle has been taken out of the PARK position.

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1 Answer

When I turn on my headlights the dash board goes black. The dimmer switch is not the issue


The dash lights are connected to the park lights. Check to see if the park lights come on. If no park lights, suspect a fuse or wiring issue. If park lights are ok, try slapping your hand on the dash area above the instrument panel to see if the lights come on/flicker. If there is a change, the instrument cluster assembly/electronics are the most likely cause of this problem

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1 Answer

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tail lamp are really parking lamps after all the fronts glow and the rear, and the sidemarkers and the dash lamps all glow, with the
Headlight switch 1 click, do that all fail, up to 20 lamps.
this is key fact, and makes diagnosis far more easy.
turn dash cabin dimmer on high. too.
the fuse box i most cars they will be marked, TAIL or PARK
did you even look?
ok the schematic is on my screen,(alldata.com)
fuse j4----j5 location then to PK relay both in the IP fuse box,
IP= instrument panel.
THE BCM controls this relay
the BCM sees you turn the digital swtch to park and then closes the relay, it is that simple.

the fuse is marked PK lamps, (as in parking)

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