vt_hokie2008
Full Access Member
2007 Tahoe LT, putting in DDM Tuning 35W 6000k HID kit with relay harness.
First off, I've installed 10+ of these kits with the relay harness and have found a few issues with the harness. The primary issue is the fuse holder does not seal from the weather, so it corrodes over time and you get misfires and eventually the lights will not turn on at all. To fix this, I removed this:
and replaced it with this, which I purchased at Advance Auto and then soldered into place. Note: this fuse holder does not come with a fuse, so you will need a 30 amp bus fuse to put in there.
Remove the airbox
On the passenger side, behind the headlight housing you will see a black rubbery sheet, get the top of it loose (two clips) and you will have access to the low beam bulb easily.
The drive side is similar, however the windshield washer fluid reservoir is in the way. I removed just one clip on that side and worked in a tight space.
On both sides I removed the top two screws that hold the headlight housing in. This allowed the housing to move a little and made it easier to work with.
As for wiring the harness, the red and black wired plug connects to the ballast, the other plug connects to the factory bulb plug, as seen here:
I got my power here:
And my ground here (this is under the airbox)
The bulb wires up to the ballast in only one way, there is an extra plug running through the grommet that you will not use.
I zip tied the ballast to this metal bar behind each of the headlight housings, then stuffed all of the ballast wires behind the black rubbery sheet.
I ran all wire harness wires under the plastic pieces above and in front of the radiator and zip tied where necessary to keep things tidy. Here are a couple of pictures of the lights on.
Any questions, just ask.
First off, I've installed 10+ of these kits with the relay harness and have found a few issues with the harness. The primary issue is the fuse holder does not seal from the weather, so it corrodes over time and you get misfires and eventually the lights will not turn on at all. To fix this, I removed this:
and replaced it with this, which I purchased at Advance Auto and then soldered into place. Note: this fuse holder does not come with a fuse, so you will need a 30 amp bus fuse to put in there.
Remove the airbox
On the passenger side, behind the headlight housing you will see a black rubbery sheet, get the top of it loose (two clips) and you will have access to the low beam bulb easily.
The drive side is similar, however the windshield washer fluid reservoir is in the way. I removed just one clip on that side and worked in a tight space.
On both sides I removed the top two screws that hold the headlight housing in. This allowed the housing to move a little and made it easier to work with.
As for wiring the harness, the red and black wired plug connects to the ballast, the other plug connects to the factory bulb plug, as seen here:
I got my power here:
And my ground here (this is under the airbox)
The bulb wires up to the ballast in only one way, there is an extra plug running through the grommet that you will not use.
I zip tied the ballast to this metal bar behind each of the headlight housings, then stuffed all of the ballast wires behind the black rubbery sheet.
I ran all wire harness wires under the plastic pieces above and in front of the radiator and zip tied where necessary to keep things tidy. Here are a couple of pictures of the lights on.
Any questions, just ask.
