I have the IPF H4 conversion on my 2008 Wrangler. It came with the harnesses to go from stock wiring to the H4 bulb. Will that harness work for the the new Truck-Lite 7" round, or do I need to get their harness? http://www.quadratec.com/products/97017_6100.htm

You can use your existing Wire Adapter Plugs, but an actual SMS harness will help eliminate flicker. The SMS harness pulls power directly from the battery to maintain ~12 volts to the headlamps. There are threads here w/very good results using the SMS harness w/Hella/Cibie lamps.

Its an obnoxious flicker that is constant whether the vehicle is running or not. It sucks and can't be ignored, its that obvious. Think twinkling lights type of flicker. Do the lights work Hell Yes. Is it Trucklites fault I don't think so they make lights for multiple applications and can't be held accountable for Chrysler's doing. I'm happy with my purchase just not thrilled I have to shell out another buck thirty for a harness but I will because the light output is worth it.

This will work its basically what trucklite sells for it to work in the first place. But to eliminate the flicker (because it's an LED system not a bulb) you'll need to work around the pulse management system that's incorporated into the vehicles ECU.

Oh and btw this is what they look like mounted up. I also swapped my painted black grill in for Spring/Summer.

http://i148.photobucket.com/albums/s...-857d-2251.jpg

they look great. hopefully mine won't flicker, but if they do I'll see what solution you come up with.
cheers. and good luck

For a wiring novice, how difficult is installing the harness? Anything you can really screwed up.

plug the one end into the OEM plug which is connected to a black and red w/ relays that run to the battery for direct power which then have a wire that runs to the new headlight. Wire it all up with no splicing or cutting and BAM no more flicker since it's a constant power supply and you still retain control of the lights at the steering wheel. It's not cheap though tack on another $128.00 for the harness.

Where are you finding the harness?

They don't all flicker all the time. I have the previous Trucklites and there's a flicker that's barely noticable when you're idling. It's going to vary from rig to rig, depending on a few different things. Post pics when you have 'em in.