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TruckLite issue

1K views 6 replies 4 participants last post by  VTEK1 
#1 ·
So I had my headlights wired up with a home-brew harness with two relays and about a week ago the high beams started freaking out, and then nothing. I swapped a bunch of relays around, traced wiring...nothing fixed it.

I went back to the stock headlight connectors which I cleaned and got a little bit of corrosion out of. No the high beams come on and flicker, like a very fine flicker; almost like on the motorcycle.

Because the stock connector is what "flips" the relay to high beam I'm thinking thats the issue, so I dived into the fuses and such and nothing.....

Any ideas, it sound kind of like a high beam switch on the column but just want a few opinions and ideas. Thanks. :cheers2:
 
#3 ·
XJ headlight switches are know to stuggle with carrying full amperage load of the lights. The purpose of the re-harnessing is to shift the load to relays fed directly from the battery thus bypassing the switch with the load. I'd pull a quick test wire from the battery positive terminal to the relay trigger to see if they come on properly. If they do, the relays aren't getting a good trigger signal from the switch. If they don't then you have homebrew harness issues. The dim lights and flickering you noted seems to indicate a bad connection.
 
#5 ·
After I took out the homebrew headlight harness and spruced everything up with a combination of dental tools, a wire brush, spray electrical contact cleaner, and dielectric grease.....it seems the high beams will still flicker but only when the Jeep is off. Low beams are fine. It's still a little perplexing considering I'm running a pretty large platinum battery and 4AWG cables for EVERYTHING related to the charging system. But it's all working.
 
#6 ·
When you say high beams flicker, what is fluctuating? The voltage of coil signal to the relay or the power from the battery under load.
Is it bright/dim or on/off?


There's not much to go wrong here. If the relays are hooked up properly only a very small amount of power is needed from the light switch. You should have a very strong connection to the contacts of the relay from the battery (via fuse).
 
#7 ·
Everything was good with the lights, I noticed when the Jeep is off when I switch on lights they are good, you switch to high beam you get a bright/dim flicker for a few and it's only for a few seconds.....then it just stops and the high beams stay on no problems....I think it was a combination of using the wiring harness and dirty connections. Since they are LED I went back to stock harness and have had no further issues.
 
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