Can't control the brightness of dash lights?
#1
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Year: 99 94
Model: Cherokee (XJ)
Engine: I6
Can't control the brightness of dash lights?
I can no longer control the brightness of my dash lights. I took the factory out and cleaned it and put it back in. That did not help. I bought a new one and put it in and it did the same thing.
My headlights turn on. I can turn on the interior lights by turning the **** all the way to the left. My dash lights do come on at full brightness but refuse to change with the **** being turned. It is very annoying to drive with the lights on at full. Any ideas are appreciated. Thanks.
My headlights turn on. I can turn on the interior lights by turning the **** all the way to the left. My dash lights do come on at full brightness but refuse to change with the **** being turned. It is very annoying to drive with the lights on at full. Any ideas are appreciated. Thanks.
#2
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"I took the factory out and cleaned it and put it back in. That did not help. I bought a new one and put it in and it did the same thing."
What did you take out, clean, and put back in, the headlight switch? If you bought a "new" one it's not entirely impossible that it's defective. Sometimes the used junkyard stuff is actually better than the cheap offshore crap they sell for "new". It's not hard to test the reostat with a DMM btw.
What did you take out, clean, and put back in, the headlight switch? If you bought a "new" one it's not entirely impossible that it's defective. Sometimes the used junkyard stuff is actually better than the cheap offshore crap they sell for "new". It's not hard to test the reostat with a DMM btw.
#3
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Year: 1999
Model: Cherokee
Engine: 4.0 I6
Not sure what you have in your dash, but when I replaced the incandescent dash bulbs with LEDs in my 96 they would not dim. If I turned the dimmer all the way down they would shut off but it was either on or off.
#4
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Year: '96
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LED's don't dim. Diodes either conduct or not. (For you engineers; yeah, yeah, yeah, I know. This isn't the place to discuss PN Junctions etc.)
#6
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Year: 99 94
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"I took the factory out and cleaned it and put it back in. That did not help. I bought a new one and put it in and it did the same thing."
What did you take out, clean, and put back in, the headlight switch? If you bought a "new" one it's not entirely impossible that it's defective. Sometimes the used junkyard stuff is actually better than the cheap offshore crap they sell for "new". It's not hard to test the reostat with a DMM btw.
What did you take out, clean, and put back in, the headlight switch? If you bought a "new" one it's not entirely impossible that it's defective. Sometimes the used junkyard stuff is actually better than the cheap offshore crap they sell for "new". It's not hard to test the reostat with a DMM btw.
I am going to try getting a different switch today and then I might be off to the junkyard.
I still have the factory bulbs in btw.
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#8
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Based on that schematic just measure resistance from pins 1 - 9 and look for a nice linear change as you turn the switch. If that's good repeat measuring Volts DC. Should point you at the problem.
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