2002 Volvo D12 right turn light issue

It looks like fuse 67 and ground post 10 could play a part in this. As you can see, the front right turn lamp, right side repeater, and trailer connector are all part of that 113 circuit which runs to the turn signal switch and hazard signal switch.

...could also have to do with that trailer light maybe, since it made the relay go off... have you tested it with the trailer pigtail unhooked to see if it still does it on the truck side only?

 

I think the turn switch is built into the lever left of the steering wheel. There’s 6 ground posts under the hood on the firewall, three on each side, there’s a few in the cab by the pedals behind the cover. Not sure which one is post 10, I was looking last night.

I may be the turn signal lever. I’m not sure, I would have to study the wire diagram more.

 

Never mind looks like 3 and 9 are the turn signal switch’s. Maybe test there for power with the turn signal to the right.

 

NICE!! thanks for the update