Bad Ground....but, where?

[Sheepdip]

Get you a long jumper wire that will reach from the neg post on your battery to anywhere on the truck with alligator clips both ends then you can test each problem area to see if it is in fact a ground.
If no place to hook the clip I push a small safety pin thru the ground wire and hook the clip to that.

[rockyrivermark]

Originally Posted by Sheepdip

Get you a long jumper wire that will reach from the neg post on your battery to anywhere on the truck with alligator clips both ends then you can test each problem area to see if it is in fact a ground.
If no place to hook the clip I push a small safety pin thru the ground wire and hook the clip to that.

best advise right there.
RRM

[Greasey Harley]

Originally Posted by Sheepdip

Get you a long jumper wire that will reach from the neg post on your battery to anywhere on the truck with alligator clips both ends then you can test each problem area to see if it is in fact a ground.
If no place to hook the clip I push a small safety pin thru the ground wire and hook the clip to that.

I agree with this.
I would also add, If one ground is bad, others are probably bad or weak.
I recommend systematically removing, cleaning and reinstalling all the grounds on the truck. Bonus points if you replace all the star washers and apply a dab of di-electric grease. Don't be afraid to replace wires or even add extra grounds (the more the merrier).
I have fixed all kinds of electrical gremlins, simply by redoing all the grounds.