I have an issue with the lighting circuit on my spit 4. Fitted a new loom, lights etc but had smoke coming from the rear section of the loom a while back. I tracked it down to one of the new light units shorting out as the power feed bit was touching the bulb holder so a direct earth, clearly being a brand new unit this should not have happened. Fixed that and everything fine for months. Went for the mot yesterday and more smoke from under the dash board and the tester said there were sparks (?) coming from the main light switch ( which is an original unit) - not sure how it was visible when fitted to the dash board but still.
I have removed the light switch and the main wire into it has clearly got very hot, the wires coming out of it have also melted their insulation in a couple of areas. I suspect the rear light might have earthed out again however given the sparks, is the light switch defective as well or is this coincidental or as a result of the rear light shorting ?
I am not too up on auto electrics but wondered if the fact I have also fitted an alternator in place of the dynamo or the halogen headlights (the ones supplied by specialist triumph spares company) potentially contributory.
has anyone else has issues like this ?
thanks Hugh