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headlight harness troubleshooting

Old 08-26-2015, 07:39 AM
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Default headlight harness troubleshooting

I built/installed the harness a long time ago. It has been one of the best upgrades I have done. I recently replaced my motor and now my low beams don't work. I never disconnected any of the harness; just removed the headlamps from the header panel. High beams work, but not the low beams. I may try to swap the wires and see if that changes anything. Just not sure what else it could be... Fuses looked good and all the wires were in tact.
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Old 08-26-2015, 11:14 AM
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Originally Posted by Gauge View Post
I built/installed the harness a long time ago. It has been one of the best upgrades I have done. I recently replaced my motor and now my low beams don't work. I never disconnected any of the harness; just removed the headlamps from the header panel. High beams work, but not the low beams. I may try to swap the wires and see if that changes anything. Just not sure what else it could be... Fuses looked good and all the wires were in tact.
what about relays? Corrosion on the terminals at headlamps, relay socket, fuse socket, etc?
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Old 08-26-2015, 10:11 PM
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Try swapping the relays
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Old 08-27-2015, 08:41 AM
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That will be my next atteempt. I just swapped factory headlight harness wire locations, just to get me home last night.
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Old 09-04-2015, 03:07 PM
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It's hot out... I know I'm missing something. Low beams are still no go. I swapped relays (a new one from my stash) and that didn't do anything. Checked fuses again, they still are in tact... No cut wires.... the high beams work, they also work if I put the relay circuit in the low beam factory output. The low beam relay circuit does.not work on either side of the factory harness output. I can't imagine both low beam filaments going out at the same exact time. I guess tomorrow is another day.
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Old 09-05-2015, 02:18 PM
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Fixed! Loose wire inside harness
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