M750 high beam idiot light permanently on

[motomartin11]

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.

[slob]

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.

[motomartin11]

Originally Posted by slob

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.

[motomartin11]

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!

[motomartin11]

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 .