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Discussion Starter · #1 ·
My digital cluster in my 94 caprice works when the headlight switch is off but when i turn the headlight switch on it goes out anybody ever had that problem or is it my wiring going bad?
 

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Discussion Starter · #11 ·
yeah maybe that switch is gone out or my wiring is got a short in it or something
 

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Discussion Starter · #15 ·
yeah i have the steath switch when i hit it, it does nothing when the lights are on but it turns the digi dash off when the lights are off
 

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Discussion Starter · #21 ·
no i dont have one i checked for it i didnt know if you had the stealth switch you dont have a T/S
 

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Discussion Starter · #27 ·
ok ill this this and get back to you guys becuase its not the stealth switch that works fine

I'm going from fuzzy memory here, so double check what I'm saying. There is a remote dimmer module somewhere under the dash, AC Delco p/n D1509B. It is a transistor circuit that controls dash illumination when the lights are on. I believe (again, double check me here) that when it fails the dash lights work only when the headlight switch is off. The factory service manual has the complete troubleshooting sequence I think. Note that this module is NOT the dimmer switch-- it is separate. Rockauto has them for about $30. They're used on a bunch of GM vehicles from mid-80s on up, so you can probably find one in the boneyard if you want a cheap one as a "try-and-see" part.
 

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Discussion Starter · #30 ·
yeah thats exactly what im saying

I think what he's saying is when his lights are off, his cluster lights up but when he turns his lights on, his cluster turns off. I think it mite be something to do with the dimmer switch, but I don't know
 

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Discussion Starter · #38 ·
the blackout switch i have that but it works fine to turn it off when i have my lights off but when i have my lights on the dash is black no matter how many times i press that switch
 
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