UK Monster Owners Club Forum .: Technical :. Electrics » M750 high beam idiot light permanently on

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Old 16-06-2021, 09:24 PM   #1
motomartin11
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M750 high beam idiot light permanently on

Any ideas what might be causing this please?I now ride with low beam permanently on but even with a dipped beam the high beam warning light is illuminated. Maybe not fully but it's definitely on.If I switch to high beam the warning light gets a bit brighter and the high beam filament seems to come on.
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Old 16-06-2021, 10:03 PM   #2
slob
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bad earth connection.
the dip circuit is trying to earth via the high beam warning light.
inspect and clean all the connections, look for damaged wires.
if you have a multimeter, look for high resistance on an earth wire.

Last edited by slob; 16-06-2021 at 10:12 PM..
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Old 17-06-2021, 03:47 PM   #3
motomartin11
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Quote:
Originally Posted by slob View Post
bad earth connection.
the dip circuit is trying to earth via the high beam warning light.
inspect and clean all the connections, look for damaged wires.
if you have a multimeter, look for high resistance on an earth wire.
Thanks-I'll check that out.Yes I have a multimeter but I'm no sparky!Will report back on what i find and do.
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Old 23-06-2021, 10:23 PM   #4
motomartin11
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Think I have sorted this now by careful application of GT85. Now one of the fork seals is leaking doh.Don't you just love old vehicles!
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Old 24-10-2021, 05:30 PM   #5
motomartin11
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This problem reared its head again before I took the bike off the road in September for winter jobs.
I've managed to fix it today by running a separate earth wire inside the headlamp from the headlight electrical connection to the one of the headlamp mountings .
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