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How do I test the dimmer switch on my 1987 chevy chevrolet nova? And if it's broken, how do I replace it? Asking because my dashboard lights don't come on even though all the fuses seem to be working and in place. My wiper mister isn't working either, but thinking that may be unrelated, perhaps it's simply plugged with debris. Thank you.

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  • karen40 Nov 01, 2012

    Thanks so much for replying. Could you confirm - I should try replacing the headlight switch (not the dimmer switch), correct? Also, where is the headlight switch located?

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  • Cars & Trucks Master
  • 5,371 Answers

Dash lights are routed and controlled by the headlight switch. Dimmer switch should not affect the dash lights. You cannot test either switch, but if not working right, just try a replacement.

Posted on Nov 01, 2012

  • montehammons Nov 02, 2012

    Yes, the headlight switch. It's either on the dash, or on the multi-function stalk on the steering wheel.

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The only other part that could be the problem with the winshield wipers not working in slow-mode or not park when you shut off the wiper switch is the winshield wiper motor, it has a park swith inside the motor to shut off the wipers and park them were they should be.

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OK try this, push and hold brake then push on the hazard switch if brake lights come on then replace the turn signal switch.

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