headlight harness upgrade
Without:

With:

I noticed a marginal difference enough to justify the $30 for it. It comes with bright yellow loom on the wires which looks pretty ghey, so buy some black split loom to cover it. As mentioned by someone else the passenger side wiring is pretty short, however it fits nicely if you run it atop the condenser. The ground wires at each headlight are super short as well so you're very limited on where you can attach them if you're not keen on drilling new holes.

With:

I noticed a marginal difference enough to justify the $30 for it. It comes with bright yellow loom on the wires which looks pretty ghey, so buy some black split loom to cover it. As mentioned by someone else the passenger side wiring is pretty short, however it fits nicely if you run it atop the condenser. The ground wires at each headlight are super short as well so you're very limited on where you can attach them if you're not keen on drilling new holes.
Last edited by oxymoron29; Nov 2, 2013 at 12:04 AM.
Found the link to mine. https://dodgeforum.com/forum/2nd-gen...ml#post2921741
@oxy - you have the stock shroud?
I don't so I was able to run along the bottom. I had plenty of room and length. Just stating the differences.
Fresh black colored conduit contains the yellow harness.

End of loom at passenger HL

AtomicDog -- get on it bud!
The output is better and especially it removes the load from the HL switch, which is a common failure point.
@oxy - you have the stock shroud?
I don't so I was able to run along the bottom. I had plenty of room and length. Just stating the differences.
Fresh black colored conduit contains the yellow harness.

End of loom at passenger HL

AtomicDog -- get on it bud!
The output is better and especially it removes the load from the HL switch, which is a common failure point.
I picked it up and installed last year. I also extended the wires to the battery.
The lights will work normally with the switch.
What it does change though is changes the switched ground to switched positive on the headlights.
As they work stock, when the lights are turned on, the headlight switch connects the ground for the lights.
When using this harness, when the lights are turned on the positive will be connected.
This will not cause any problems though. The only relevance it will have is, as in my position, if your were to have a plow. The wiring had to be converted for the plow lights after I installed the HD harness.
The lights will work normally with the switch.
What it does change though is changes the switched ground to switched positive on the headlights.
As they work stock, when the lights are turned on, the headlight switch connects the ground for the lights.
When using this harness, when the lights are turned on the positive will be connected.
This will not cause any problems though. The only relevance it will have is, as in my position, if your were to have a plow. The wiring had to be converted for the plow lights after I installed the HD harness.
Whit3, I have the stock shroud. You must have an earlier version that was longer? There's no way I could go down to the rad support and go across then back up to the pass. side, way too short. I might as well stick up a couple pics of how I routed it for anyone interested:
relays mounted using factory holes:

up on the condensor:

in hind sight trying to protect the wire from the heat of the rad didn't work so well
to the pass side light:

edit: I should mention that measuring voltages at the lights before / after the harness install yielded +1V increase, which is pretty substantial
relays mounted using factory holes:

up on the condensor:

in hind sight trying to protect the wire from the heat of the rad didn't work so well
to the pass side light:

edit: I should mention that measuring voltages at the lights before / after the harness install yielded +1V increase, which is pretty substantial
Last edited by oxymoron29; Nov 2, 2013 at 06:56 PM.
Thanks for the motivation, folks! I'll get that harness installed real soon. The brighter my headlights, the better! I also have to complete wiring my fog light kit and off-road lights that I added, too.
I don't have the details. I had the place that installed the plow re-do it. All I know is that they had to rewire the lighting part of the plow harness on the truck due to the HD harness changing it from the factory switched ground to a switched positive.











