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Hello, my 79 850 shaftie developed an issue over the winter, when the headlight switch is on it is stuck on high beam. I’ve removed the handlebar switch, clean contacts with wurth contact cleaner and a diamond file, reassembled and same thing. With this switch being specific for these bikes has anyone else ran into this issue? Bike was in my dry storage unit all winter.
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79 GS850G cruising around western Maine -
Yeah, that's the problem with those 850 shafties. Now, if you had the 850 chain drive...
Sorry, couldn't help myself. And I can't help you with your problem. But with the vast numbers of 850s, you should be able to find one being parted out. Good luck.
1982 GS1100E V&H "SS" exhaust, APE pods, 1150 oil cooler, 140 speedo, 99.3 rear wheel HP, black engine, '83 red
2016 XL883L sigpic Two-tone blue and white. Almost 42 hp! Status: destroyed, now owned by the insurance company. The hole in my memory starts an hour before the accident and ends 24 hours after. -
Odd, did you try a different bulb?
these left hand switches have different style connectors (under tank) …so a used one might not be plug and play. They surface on eBay all the time.1981 gs650L
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I have seen issues like that several times, the switch not always being the problem.
(ref. below schematic) the "light control switch" switches 12V to the "headlight dimmer switch".
From your description, that part (ON/OFF) is working.
The "headlight dimmer switch" either puts 12V on yellow for high, or 12V on white for low beam.
Not both.
I would start with the headlamp bulb connector, switch on and dimmer set to low, do you get 12V on white, too ?
You should not have 12V on both yellow and white.
Last edited by Rijko; 05-02-2024, 05:47 PM.Rijk
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