How to test my light switch? - Team Camaro Tech
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post #1 of 4 (permalink) Old Apr 4th, 12, 10:07 AM Thread Starter
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How to test my light switch?

Background: http://firstgenfirebird.org/forums/u...=248232&page=2

When I pull the switch out, the rear lights always go on, the internal lights go on very randomly, and the headlights don't ever go on. I remember that when I was fidgeting with the switch, the internal lights would work in only some positions, so I believe that the switch is to blame, and there is no loose connection.

So. My question is how can I test this switch to see if it really is the problem?
I have labeled both pictures the same for ease of reference. Also, how should I have the plunger when testing? Thanks!



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post #2 of 4 (permalink) Old Apr 4th, 12, 10:47 AM
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Re: How to test my light switch?

Check your dash grounds first and foremost. Also check the dash bulbs they may all be dead. If that fails to fix the issue then move to the next step.

"Internal" as in dash lights and the dome light/courtesy lights are controlled by the rheostat located at the front of the switch. Quality switches will have porcelain, cheap will have Bakelite behind the spring like rheostat.

To test while still in the car, rotate the switch full clockwise until you feel the click. this should activate the dome/courtesy lights. If yes, then rotate just back from the click and the dome/courtesy lights should go out leaving the dash lights at full brightness.

If this is true then several aggressive sweeps of the knob from full off to full on may clean up the issue. Otherwise remove switch and clean rheostat with good quality tuner cleaner (top grade silicone) from Radio Shack. If that fails to fix the issue then you need a new switch.


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post #3 of 4 (permalink) Old Apr 4th, 12, 11:43 AM Thread Starter
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Re: How to test my light switch?

Quote:
Originally Posted by 69-Pace View Post
Check your dash grounds first and foremost. Also check the dash bulbs they may all be dead. If that fails to fix the issue then move to the next step.

"Internal" as in dash lights and the dome light/courtesy lights are controlled by the rheostat located at the front of the switch. Quality switches will have porcelain, cheap will have Bakelite behind the spring like rheostat.

To test while still in the car, rotate the switch full clockwise until you feel the click. this should activate the dome/courtesy lights. If yes, then rotate just back from the click and the dome/courtesy lights should go out leaving the dash lights at full brightness.

If this is true then several aggressive sweeps of the knob from full off to full on may clean up the issue. Otherwise remove switch and clean rheostat with good quality tuner cleaner (top grade silicone) from Radio Shack. If that fails to fix the issue then you need a new switch.
-In the link I posted earlier, it shows that the lights are working, so that is not the issue.
-The dash ground is working fine, just tested
- Courtesy light has been removed (roll cage, no room for it)
- When the lights WERE working, i would rotate the switch full clockwise, then back it off slightly, and that's the point that they internal lights would work. Now though, they don't come on at all, leading me to believe that it might be a worn out switch

Thanks for the help, still trying to wrap my head around this
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post #4 of 4 (permalink) Old Apr 4th, 12, 04:31 PM
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Re: How to test my light switch?

As Brian states, dome/courtesy lights would come on with knob rotated fully CW.
Dash lights are through the rheostat - rotate the bejesus on the knob, the rheostat does get alittle dirty in spots at times.

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