LUVTruck.com

Alright, listen to this. My passenger side headlight is way dimmer than my driver side light and my passenger side turn signal is constantly on but it is way dim. This only happens when I use my headlights. If I pull it out the lever only one click, the turn signal works great, but as soon as I pull the switch out all the way, this happens. I have checked the bulb and all the connections and it looks good. Please help.

that sounds like a battery issue. i could be wrong though.
if you have all your lights on can you start your truck? do the lights dim when you start it?

hope that help if not i was wrong

Sounds like there is a short somewhere. It could be in the turn signal that is affected (front most likely) or it could be in the light switch. The other thing I'd look for is any creative wiring up under the dash. The turn signal circuit (as well as the park lights) should be completely serparate from the headlights, so it seems strange that it would only come up when the headlights are on.

It seems like the only natural place for things to get connected together would be the front turn signal socket/wiring. But that would show up with the light switch just pulled out one click, not just when the headlights are on. Maybe someone rewired that dim headlight into the park light circuit for some reason. I guess you really need to start tracing both ends of the wiring looking for someone's hack job. From the headlight and turn signal as well as from the switches in the cab.

HA told ya i was wrong

good luck

Might also be 2 separate problems. When one head light is dimmer than the other, it is usually a bad ground on that particular lamp. Usually rust. Never-the-less, 800XL could very well be right. A high resistant short between 2 different circuits will manifest itself this way. The high resistance could be dropping the voltage to the dim bulb and powering the turn signal. Been there before. Check the wiring where the 2 lighting circuits are side be side.

yeah this.
I had the same problem with my K5 and it was a bad ground.
but don't rule out what XL said.

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03Cobra

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OK, I'm over it. Where's the beer?

Almost every time I've had wiring issues on any of my LUVs it ended up being something a prior owner had "fixed" badly. That and melted contacts at the fusebox. I had to rewire half of my old 79 before I fixed all the mistakes of the guy that had it before me. Now I've got another 79 that is almost as bad. Granted they probably had real wiring problems at one time, but the repair jobs I've inherited on my trucks seem to be worse than the original cause could have been.

My philosophy has basically become this: if it looks like someone took it apart before me, I better take it back apart and put it together right.