Pontiac Montana... when automatic lights come on, rear tail light goes out...?

[Miranda]

I have a 2001 Pontiac Montana. It has daytime running lights, I never have to manually turn my lights on. At dusk, the automatic interior lights turn on. When this happens, the rear passenger turning signal and break light go out. Any idea why this is happening, and how I can fix it? Thank you.
Yeah, that's what happens with mine. The 4 way arrows glow when I hit the brakes, and the right turning signal does the turbo blink but doesn't light up outside. Where/how do I go about cleaning them? Thanks for the info...

 

[dejonged]

Mine's similar. When it gets darker, my front blinker stops working, and when it gets light in the morning, it works correctly again. Any ideas? My Montana is a 2007 model.

 

[melsg5]

sounds like a bad ground connection

 

[dejonged]

Ground connection?

Does that mean it's a computer and light detector question, so that when the night lights go on it blocks another connection? Any simple fixes or adjustments a 'dummie' could make?

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[melsg5]

if it's a ground problem someone familiar with the vehicles electrical system has to locate the issue, it's not an unskilled persons repair