I recently picked up a 78 BJ40 with a 13B-T out of a 88 or 89 BJ74. It has a 12V conversion done and the ammeter has started to bounce when I switch on the turn signal. It is significantly worse when I signal a right turn. Last night I had headlights, no tail lights and no marker/turn signal lights. The truly odd thing is that if I dont have the headlights on then the turn signals/marker lights work but the ammeter just bounces. Does this sound like a ground problem or a alternator problem ? Looking for some advice. I put a meter on the battery while running and its charging at 12.93V.
Thanks.
Thanks.