Good morning everyone and I have a problem with my 1997 freightliner fld 120 . The high beams are dim like a bad ground or something . If I turn the headlights on and click the dim switch for high beams it will stay on if i try to click it back off it won't . I changed both headlight relays and I had a spare turn signal switch tried that to. Does anyone know where the actually relay is for the dimmer switch is? I would greatly appreciate any help on this. Thanks
High beams not working dim
Discussion in 'Trucks [ Eighteen Wheelers ]' started by nhramember, Jul 27, 2014.
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check your plugs in your headlight harness for corrosion. i had to replace a few sections of my driver side headlight harness on my fld because of corroded connectors, the harness parts i needed were in stock at my local f-liner dealer.
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Same deal. I had the issue twice.... once a mechanic smoked too much grass that day and mixed up the wiring pins in the h4 plug and I had to pull em all out and re pin em.
Next time I just replaced my headlight harness ($700) because it had been repaired 10 too many times and was time to let er go. Worked like a top since.
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