I own a '84 Trans-Am and my park lights work fine until I turn on the signals, they then go haywire, like something is crossed. I noticed that my park/headlight switch is acting up, the headlights will not raise unless the switch is kind of rocked halfway, could this be causing the wires/lights to cross?

 

Your description of the light switch operation leads me to guess that the switch itself is failing.

 

I agree with Vader, I had a similar problem where my lights were going nuts in the gauge cluster when driving at night. I noticed that when I played around with the switch itself it made a difference.

Replaced the switch and all was fine

 

Thanks dudes, you just confirmed my very thoughts on that switch being worn, can one still be ordered through GM? F- bodies rule!!!!!!!

 

I believe TDS sell them too.

Mark.