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same exact thing is going on with mine. display works when lights off, turn switch one and they all go out.
did you ever figure it out?? if not, i THINK we might need THIS
It controls the dim of the dash lights when headlights are turned on.

 

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I just replaced that control module thing I posted above with a junk yard replacement and that didnt help me either. also replaced my dimmer/headlight switch, didnt help. did you figure it out yet??? Im stuck and have no idea where to look next, if you figured it out please post it up

 

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that would be a possibility, if I had a 9C1

 

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BUMP... hoping someone can figure this out, or give us some guidance if they went through this before..

 

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im in on this since the same issue is goin on with my non 9c1. With mine, dimmer has been replaced, dome comes on when rolled up, fuse is good, i pulled my fuse just so i can at least see my speed since i work and drive at night. I even replaced the little dimmer module thing mounted down under left of the steering column. I have no clue where to look from here. Frustrating as hell, and my thread about this same problem gave me no solution other than the dimmer switch. Im just witing for that one dude to chime in that had and fixed a problem like this othr than the dimmer.

 

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a used one, I bought one here and was told it was good ( dont have anyone here with a new one to try out)
I have a multimeter... ashamed to admit that I have no idea how to use itcwm3 I can handle detailed instructions tho...

 

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good info, thanks!
now on to google lol...

 

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I appreciate all your advice and help man^^^
I havent had a chance to tap into it yetcwm3, been too busy finishing the window channel and dash on my skylark so I can get that windshield back in. Im gonna try to get to it this week, if i can figure out how to set and use this Multimeter LOL! (sad i kno)
i can wrench all day long but when it comes to electrical... uh... derr de derrr

 

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thats good info. thanks!
been too busy to even think about messin with it. but i will try this out.