Wheel3r

I'm installing the Truk Light LED headlights and was wondering if the harness mod is still needed..? My thought was these are using a lot less power than the H4's...so is it still necessary.

I will say I noticed the lights do have the H4 connector so maybe I'm going to be forced to upgrade...just curiuos.

Thanks for the help :-)

SatiricalHen

shouldn't need to upgrade harness, the plugs are the same on the stock harness and and upgraded harness. I have trucklites and the harness, but only because I never planned on having truck lites, planned on getting h4s.

Fred/N0AZZ

The Puto harness is cheap why not replace the stock (known to be crappy harness) with an upgrade, when spending that much on headlights?

extrashaky

The stock harness is known to build up resistance over time, which is why our stock headlights become dimmer as the Jeep gets older. Electricity is having to travel through the entire circuit, which goes through the switch in the dash, and the wires in that circuit can't transmit as much electricity as they could when new. When you increase the resistance, the electricity that can't run through the wires gets converted to heat, which further damages the wires and the headlight switch, leading to failure. Upgrading to LED headlights doesn't change the resistance in the headlight circuit. You still risk burning your headlight switch.

What adding a relay harness does for you is shortens the distance the power for the headlights has to travel and refreshes that circuit so that the resistance is reduced. With the relay harness, the switch only needs enough power to trip the relay. The full power to the lamps is not having to go all the way to your dash before reaching the lights.

So I would still install the harness. Personally, I shelled out the extra money for the ARB harness, which is really solid and has very good relays with it rather than the cheap relays that come with the Putco harness. Most people have pretty good luck with the Putco harness, but some people have reported relay failures. For mine, each time I upgrade something I try to make it as bulletproof as it's practical to do so. I really don't want a cheap Chinese relay to crap out in the middle of a hurricane.

andrewmp6

Like said is it needed no but its better to have it anyways.

93_xjcherokee

Upgrade your harness. You will see a huge improvement even on your stock headlights

n00g7

LED lights have a driver. Lower voltage on the circuit = greater current draw. As long as the voltage doesn't fall below a threshold for the driver, and amperage can be delivered, the LEDs will stay the same in brightness. The trucklight LED headlights draw less power on high than a halogen on low... so don't feel like it's necessary at all.

Crazy 8s

I don't see the point of paying $200 a bulb for LEDs, $400 the pair, to accomplish the same brightness as 2 $15 H4 halogens would with the relay harness.

It is the most annoying thing in the world to drive towards cars with their high-beams on, and with those LEDs being supposedly so much brighter than halogens bulbs this will only cause more dangerous conditions for other drivers.

Rude.

besthaticouldo

That's because they're not the same thing.

Real LEDs like the truck-lites don't cause dangerous conditions.

JPXJMOAB

I'm going to disagree.

Crazy 8s

What do $400 LED headlights get you for that money?

sycoglitch

This statement is wrong. Properly adjusted TL give off great light and don't blind oncoming traffic anymore than stock projectors of most new vehicles. And every housing And bulb will have a moment in its usage where it'll blind someone else due to a bump, dip, curve etc. thats just life. Hell, even with my hellas and 80w bulbs, i cant wait to get TLs to get better light output.

Crazy 8s

I am just really impressed with how well that $30 relay harness worked for the cheap halogen bulbs and I don't really know how $400 bulbs could be worth that kind of money. The exception would be just to be different and have a different look, and I am totally cool with that. If you gotz da cash, hook it up!

n00g7

IMO, they're meh and nowhere close to an HID projector.

sycoglitch

the harness and a newer style h4 housing does work wonders. Like i said, I'm currently rockin the hella e-code housings and i finally had a chance to re aim them. Same height but better left and right, since i have a garage door and space to do it, and they feel brand new how they light up the road. Lot of people dont realize how aiming of headlights makes a huge difference