4 Headlight mod (99-02 only)
This modification is possible on most years. Basically, the way stock headlights work is when you click on the high beams, the low beams click off. Like this:
Low beam:
Yellow wire – at resting state “off” is 12V+, drops to ground when turned “on”
Orange wire – remains at 12V+ constantly
High beam:
Purple wire – at rest “off” is 12V+, drops to ground when turned “on”
Orange wire – remains at 12V+ constantly
I live out in the country and having the ability to have all four lights on in the “high” mode would be awesome. All too often I see deer just dying to throw themselves at my truck. If I could light up a lonely road, maybe I could anticipate it better.
I googled how to do this on my truck and this is what I found out.
1. Open hood
2. Remove brace from firewall to Driver’s side fender.
3. Remove top of Circuit panel.
4. Unhook the snaps from the passenger and drivers side of the cover.
5. Roll entire circuit board over towards the passenger side.
6. Locate the Grey connector. (There is only one)
7. At location D3 (3rd down 4th to the right) is a light gauge yellow wire. It is the only yellow wire in this row.
8. Tap this wire and ground it to the Light ground on the firewall. Follow the lead from the Hood mounted light, and you will find it …just to the left of the Master Cylinder.
9. Put your stuff back together.
I found the information here:
Quad Headlights Mod
This sounds simple enough. While I have the headlight assemblies out for the Euro upgrade, I plan on making this mod.
DDM HID headlight upgrade
Since I’m going to all the trouble of replacing my headlights with the European versions, I figured I would upgrade to HID lights while I have them apart.
What are HID lights?
High-intensity discharge (HID) headlamps produce light with an electric arc rather than a glowing filament. The high intensity of the arc comes from metallic salts that are vapourised within the arc chamber. These lamps are formally known as gas-discharge burners, and produce more light for a given level of power consumption than ordinary tungsten and tungsten-halogen bulbs.
Automotive HID lamps are commonly called “xenon headlamps”, though they are actually metal halide lamps that contain xenon gas. The xenon gas allows the lamps to produce minimally adequate light immediately upon powerup, and accelerates the lamps’ run-up time. If argon were used instead, as is commonly done in street lights and other stationary metal halide lamp applications, it would take several minutes for the lamps to reach their full output.
Project "Charlie Murphy" 