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Cluster bulbs not lighting up

Blueallie

Member
49
9
8
Buick Ownership
La Sabre
My daughters cluster lights and hvac control lights have gone out.PRNDL and odometer is still illuminated but nothing else.
I pulled all the related fuses and checked the bulbs for burnt out ones. The lights still don’t turn on.
Anything I’m missing?
 
Last edited:

ledzilla

Full Member
202
14
18
Buick Ownership
2001 Century Custom
I know mine has an issue where the cluster lights go out if the light knob is turned to the end for the dimmer where it should be brightest. I assume the potentiometer has a dead spot, like what tends to happen to throttle position sensors, Have you tried fiddling with the dimmer at all to see if it's the culprit?
 

Blueallie

Member
49
9
8
Buick Ownership
La Sabre
I know mine has an issue where the cluster lights go out if the light knob is turned to the end for the dimmer where it should be brightest. I assume the potentiometer has a dead spot, like what tends to happen to throttle position sensors, Have you tried fiddling with the dimmer at all to see if it's the culprit?
I found a pinched wire in the rear lights that somehow affects the cluster and hvac lights. The rear lights didn’t work either.
So i cut and soldered the wires back together and it works now.
______________________________
 

Again

New member
24
10
3
Magnetic Hill, New-Brunswick, Canada
Buick Ownership
2016 Encore
The cluster lights turning off on a GM is to let you know you have no taillights. The BCM triggers the dashlights to go off if it doesn't sense current going through the tail lamps. Same with cruise not working, that is to let you know your high brake light isn't working.
 
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