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Headlights not working??
Roger Milne:
So for those following along, here's what I discovered today.
After trying to find the voltage at the plug ends, I discovered that I have residual voltage of about 2.4V constant on the Hi Beam circuit. Parking light circuit 0V off, 14V on. (so that's good) Lo Beam 0V on or off. Hi Beam 2.4V on or off.
So I checked every fuse associated with all lights and all good except I discovered the dimmer fuse #69 blown. Which I can't figure out because when you pull the dimmer knob out the dimmer works on the instrument panel bulbs and parking lights, BUT when I replace it the headlights worked in High Beam, but when I switched to Low Beam it blows. It started to rain so I can't check if I start in Lo Beam if it works and then blows when switching to Hi Beam. But it seems there's an issue on the dimmer circuit?
So he did cut a wire and tapped into the Lo Beam wire on the steering column, but I cut his hack out and straight connected the wire together. Just for reference the hack he did was to feed 2 relays through a switch to go out to the LED light bar on the front. I removed that and the relays and any associated wiring. But now I'm wondering if I'm back feeding the dimmer switch somehow as the Lo beam wire he hacked was coming from that but I thought I was just re-connecting the wire minus his tap in for the light bar.
The rain just quit, so I'm going to try and put a new fuse in and see if I can get Lo Beam and see if I can switch to Hi Beam or if the fuse blows. Will post the results shortly.
Roger Milne:
So a quick follow up since the rain started again.
So unplugged the Lo Beam wire coming from Smart wheel ( the one PO had cut into for light bar) got Hi Beam and Lo Beam but as soon as I plugged it back in the #69 dimmer control fuse blew.
So I need to trace the wiring for that circuit to see what he's done down stream. I'm thinking he has a wire feeding somewhere that may have been in conjunction with the relays I removed ( believing they were for switching the LED light bar), but now thinking he may have done it as part of the Dim Headlight mod'. So now I have to figure out how to retro wire that mod' and see if I can get a good Lo beam circuit.
Steve Huber:
Sounds like you're on the right track! In case you didn't find them, the Dim Headlight Mod diagrams are below the Wiring diagrams on Coach Assist.
Steve
Roger Milne:
--- Quote from: Steve Huber on October 14, 2025, 12:29:20 AM ---Sounds like you're on the right track! In case you didn't find them, the Dim Headlight Mod diagrams are below the Wiring diagrams on Coach Assist.
Steve
--- End quote ---
Yeah I saw them and need to print them off. Then I need to trace back the wires and find out where the Mod' started and go back from there.
Thanks
Steve Huber:
I wrote them up so if you have ?s let em know and hopefully my memory won't fail me.
Steve
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