Lighting Need help!
Wiring is not that bad. You just have to be ready to for some frustration sometimes, like anything else. Just make sure you have fuses in the right places, and the worst you can do is fry a few cheap fuses.
I rewired my headlamps to use relays powered straight from the battery. All my headlamp switch does is activate the relays; no load on the switch in the cab at all = no burned out switch + slightly brighter lights.

The Halo LED projectors are almost always wired wrong in China. I had a friend that, a few months ago, purchased the equivalent lights for a newer GMC Yukon. They were wired wrong and the wires had to be spliced into the factory wiring. He used vampire clips, which I'm not a huge fan of, but they usually work. Anyway, the point is, he had to rewire his lights to.
Give me a minute, I'll see if I can't wrangle up a wiring diagram for your lights there, based on the picture you provided...
I rewired my headlamps to use relays powered straight from the battery. All my headlamp switch does is activate the relays; no load on the switch in the cab at all = no burned out switch + slightly brighter lights.

The Halo LED projectors are almost always wired wrong in China. I had a friend that, a few months ago, purchased the equivalent lights for a newer GMC Yukon. They were wired wrong and the wires had to be spliced into the factory wiring. He used vampire clips, which I'm not a huge fan of, but they usually work. Anyway, the point is, he had to rewire his lights to.
Give me a minute, I'll see if I can't wrangle up a wiring diagram for your lights there, based on the picture you provided...
First of all, you'll have to get an adapter or splice into the wires on your new lights. Plug and play just won't be an option unless you make an adapter.
Tell me if this makes any sense. I color coded the wires at the end based on the picture you showed above.

The colors didn't quite come out right... the orange-ish wires on the end are supposed to be red, like your high beam wires on the lights.
Tell me if this makes any sense. I color coded the wires at the end based on the picture you showed above.

The colors didn't quite come out right... the orange-ish wires on the end are supposed to be red, like your high beam wires on the lights.
Sorry, forgot this picture, which might help a bit with identifying which wire is which.

A male to female adapter with a short span of wires. You can then move the wires around in the adapter until you get the right contacts that make the lights work. That'd be the simplest way to do it, but not necessarily the best.
You might be able to find the adapter online, otherwise you'll probably have to make your own from parts you can get at most auto stores.

A male to female adapter with a short span of wires. You can then move the wires around in the adapter until you get the right contacts that make the lights work. That'd be the simplest way to do it, but not necessarily the best.
You might be able to find the adapter online, otherwise you'll probably have to make your own from parts you can get at most auto stores.
Last edited by jasonw; Aug 7, 2009 at 01:40 PM.
The problem is that the 9004 and 9007 lamps use the same type connector however they are wired completely different. I believe those headlamps are wired in a 9007 light configuration. I had this issue a few months back when I tried to install 9007's in my truck. I had the exact same issues you are describing. Thankfully I changed the bulbs in the parking lot of the parts store and I am friends with the guys who work there. You will basically need to do what Jason said and do a rewire in order to make them work correctly.
9004 vs 9007:



