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I'm near the end of fixing up a 1986 TS125 that has been off the road for 20 years.
There is one problem I've not resolved.
When the sidelight or headlight is on & I turn on the indicators, the headlight / or sidelight get dimmer & then back to normal.
The tail light has the same issue.
I've cleaned every earth I can find but still no joy.
Any ideas?