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Troubleshooting H4 Harness + LED Housings

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Troubleshooting H4 Harness + LED Housings

Old 01-11-2019, 10:55 AM
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Join Date: May 2012
Location: Oklahoma City
Posts: 238
Year: 2001
Model: Cherokee
Engine: I6 4.0L 242
Default Troubleshooting H4 Harness + LED Housings

TL;DR Have an ARB H4 harness. Installed new LED housings, have high beams only with headlight switch on, and headlights die when flipped to hi-beam.

I do have factory fogs but my old set of H4 halogens functioned flawlessly between low/hi/fogs.

Swapped in housings, used pigtails to swap pinout so the red/blk/ylw were feeding the correct pins.

I do have a new harness on the way (the ARB is billed as a toyota harness and has 3 relays vs the traditional 2, and one of the connectors decided to nuke itself on a bulb) but i'm hoping to remedy for the time being.
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