myslo50

got my putco harness last week, i just opened it up tonight to see how to wired it up and i seen that the harness looks different/updated from the pics that i have seen on the forum. the wiring diagram is self explanatory on the back of the package. what i noticed first is that the relay mounts are just plastic. they dont have the metal grounding tabs that ive seen on previous relays. so im assuming there grounded some other way.

i do have one question for the ones that have installed the harness, theres one male h4 plug and 2 female h4 plugs. i am assuming that only 1 of the oem plugs gets plugged into the new harness and the other oem plug just gets tucked out of the way?

here are a couple of pics i took

ZINGGG

No redesign, that's how it's always come. And yes, only the one male plug goes into the OEM harness. The OEM plug on the driver side gets tucked away

ZINGGG

See the black wires with ring lugs coming off of each of the female plugs? That's how it's grounded

Aljay

Looks like the one I put on my jeep back in November.

ShadowWalker

Looks like mine that I did in September.

myslo50

i had a feeling that the black wires off the connectors were the grounds. i was picturing something different.

who has a wiring diagram for installing a different relays on this harness. like the bosch style. i know you will have to cut up the harness, but im not a fan of buying replacement relays at $20 a pop.

ZINGGG

I've had the relays that were supplied with the Putco harness for well over a year with no problems... I say run em for now and maybe pick up different ones and keep them handy for if and when the supplied ones fail

salad

I recall reading that the Putco relays crap out if they have bad grounds. I sanded down some metal real nice, bolted those eyelets down with Gardner Bender Ox-Gard, and added a ground from the radiator support to my battery post. My cheap little DMM shows 0.2 ohm between the ground pin in the left H4 connector and the negative battery post

Coach

what is this harness for?

salad

Bypasses the stock headlight wiring. The factory setup is under-sized and convoluted and performs poorly with OE spec lamps, and is dangerous with brighter lamps (headlamp switch melts). This uses relays and properly sized wire to power the lamps directly from your battery or PDC, enabling a much better current delivery and avoiding fires and melts.

Aljay

This applies to alot of vehicles ,the 97 F250 in my sig. has a harness not a putco but a much $$$$ dollar one.

salad

Ouch. Yeah, when I got my FSM I headed to the wiring diagram section pretty fast. "You have got to be ****ing kidding me..." sums up a lot of Section 8W lol. The way the DRLs work is shameful

Coach

Thanks Salad, is this for newer rigs or all of them? I'd like to figure out how to have all 4 of my Wagoneer lights on at the same time (6 including fogs).

DieselD

So just any relays would work, but I'd have to cut up the harness? Anyone know of any replacements that just plug in?

I'd like to keep some handy but if I have to cut and splice them in, it wouldn't exactly be an easy roadside fix if/when it happened. Maybe I could find a plug that'll fit that part of the harness...

salad

It's for the Cherokee modeled XJs. In the Cherokees there's a single H4 connector for each bulb with low, high, and ground pins. I'm not sure how the Wagoneer lights work - separate bulbs for low and high beam? You could modify it to work by splicing into the original connectors but depending on condition and your cost you might just make your own.

https://www.cherokeeforum.com/f67/putco-relay-167330/

Amazingly the in-site search found that and Google could not.