I spliced in a ground wire off of low beam switched wire, as it says in this thread http://www.dieselplace.com/forum/showthread.php?t=12804&page=5&highlight=headlights+mod posts #50 & 57.
Am I missing something?

The 01 & 02 HD's high beam switch controls the power. The 03 and newer high beam switch controls the ground. The mod you were looking at won't work on your truck. You need a headlight harness with a diode to allow power to both beams when high beams are selected, but allows isolation when you only want the low beams.

Jay

this is the post Im talking about

[/QUOTE]Here's how I did it on my 02, no diode needed, will work for 01s also; Pull the underhood electrical center cover off, place aside. Unbold the four bolts holding the drivers side corner brace (fender to firewall) and remove. This is to remove the cover surround on the electrical center. Gently pry the plastic snaps holding it in place. There are two between it and the fender and two large hooks toward the passenger side at the bottom. Now lift off the plastic cover for the electrical center. You will see two clips holding the electrical center close to the fender side while the two toward the passenger side are hinges. Release the two by the fender and roll the electical center towards the passenger side. The mess of wires will tug a little but it will roll over to expose the underside. Looking at the right underside you will see a grey wire block. There are small letters and numbers identifying the wires. Look for D3 and you will find a yellow wire. This is the control for the low beams. Is is switched ground on the 01-02s unlike the 03-04s. All you need to do is get a scotchlock (or solder if you prefer) and tap the yellow wire to ground. I ran it in a loom up to the ground studs on the firewall (follow your underhood light wires down if you can't find one). That's it, test it out and fold the center back down. Recover and replace the brace. http://www.dieselplace.com/forum/smileys/Big%20Smile.gif

And no the low beams won't be on all the time. When you turn the lights on or the auto sensor does it for you they will come on. However now when you switch on the high beams the lows won't shut off (the drls (http://www.dieselplace.com/forum/autolink.php?id=35&script=showthread&forumid=82) and fogs will as usual when the lows are on). You can remove the wire (or disconnect it) and you will be back to original.[/QUOTE]

Doh, highbeams burntout, changed bulbs & works fine.

That makes sense. I was thinking you were grounding at the bulbs (which works on 03 & newer).

Jay

How the heck did both your high beams burn out at the same time, Noreaster?

How the heck did both your high beams burn out at the same time, Noreaster?

I don't know, got me?