Schizophrenic headlights

[Doug Meloan]

Recently my headlights have been flickering from high beam to low beam in rapid succession, but only periodically.  Also sometimes when I try to turn on brights they won't come on, and then suddenly they may come on and then flick back off, or may stay on.  Autronic Eye is turned off but need some thoughts on what may be causing this.  Bad floor switch?  Short in system?  Doesnt seem to act up until I try to turn on brights, then it is anyone guess what will happen.

[Doug Meloan]

Thanks, Russ.  The disconnected 3 pront connector will not reach the dimmer switch so I assume that I need to splice longer wires into this connection, or am I missing something?

Thanks,

Doug

[Doug Meloan]

Well I cleaned the grounds (which they needed) and that did not solve the problem. I then replaced the dimmer switch, and that did not solve the problem.  Read through the shop manual troubleshooting suggestions and got completely confused so decided to tackle it on another day when I have more time.  I will try Russ' suggestion of bypassing the guidematic next to see if the problem lies with that system but I am confused as to what I am suppose to disconnect and re-connect at the relay.  Do I disconnect the three prong female connector at the dimmer switch and hook another three way female connector to it instead (that normally runs to the relay?) I know I will eventually get this solved (and it is fun trying to solve the mystery), but you all offer the best clues (suggestions)  Thanks.    .   

[Doug Meloan]

Thanks guys for the suggestions.  I will check the grounds and go from there.  I learned a longtime ago to walk away from a project if I start to get frustrated as like you said a solution will eventually come.  I also know that members on this website have always provided good information on where the issue may be.  Thanks again and I will report back with what I find. 

[Jason Edge]

Doug, Tony is spot on with regard to the grounds. Follow the forward lamp harness just through the radiator support grommet and you will see a black wire that attaches to the frame via 5/16" hex screw. If that ground starts to lose contact, the lights will start to flicker. Also check all other grounds. Here is are pictures of the left and right side forward lamp harness grounds: