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Riddle me this - headlight dims signals glow when revved.

Posted: Sun Aug 12, 2018 10:50 pm
by nokturnal
I have just got my bike together, converting it from a track bike (all "legal" wires were just cut, headlight, signals, etc.
). I am pretty sure I wired everything up correctly. Multimeter and wiring diagram in hand...

Everything seems to work as it should when the bike is just on the battery. When I rev the bike up when running though the headlight dims and the signals start to glow.

The same thing happens with a battery from another bike, and my brand new lithium. 3 regulators (maybe all bad??).

Ideas? I need this thing ready to go by Thursday...

Re: Riddle me this - headlight dims signals glow when revve

Posted: Mon Aug 13, 2018 3:33 am
by hondaror
Could be a ground issue on the bike. Also, stator could be on the way out.

Re: Riddle me this - headlight dims signals glow when revve

Posted: Mon Aug 13, 2018 1:11 pm
by addicted to relics
All power must past the regulator you have a wonky regulator buy one used or new from Japan not anything from china

Re: Riddle me this - headlight dims signals glow when revve

Posted: Mon Aug 13, 2018 7:35 pm
by Ebayru
My lights would dim on revving when my regulator was faulty. A replacement cured the problem.


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Re: Riddle me this - headlight dims signals glow when revve

Posted: Mon Aug 13, 2018 11:26 pm
by nokturnal
looks like it is a bad ground on the headlight. Will confirm tomorrow.

Re: Riddle me this - headlight dims signals glow when revve

Posted: Tue Aug 14, 2018 11:29 pm
by OldTZracer
Its backfeeding somewhere, so I second the bad ground - but check you haven't got a dark brown (signal) plugged into a light brown (switched power). Also, unplug the flasher relay & see what happens...

Re: Riddle me this - headlight dims signals glow when revve

Posted: Wed Aug 15, 2018 11:12 am
by nokturnal
yeah. tried all that. it was defo the headlight.

Re: Riddle me this - headlight dims signals glow when revve

Posted: Mon Aug 20, 2018 5:53 pm
by addicted to relics
good to know ground is easier than a reg/rec problem

Re: Riddle me this - headlight dims signals glow when revve

Posted: Tue Aug 21, 2018 5:33 pm
by nokturnal
now its just the dash lights... signals and high beam.

The signals themselves and headlight has had separate grounds run