Originally Posted by CardinalFJ60
They used to be on the same positive, then I ran a separate power/ground to the fridge to try to fix that interference - no improvement with that...hmmm...ground is the next I'll check.
Could be a loose or improper ground. Might also check to make sure the ground from your battery/alt has a good connection. I remember having to take teh bolt off and grind a bit in the engine block on my 40 to get a good contact
measure from battery to a point on the chassis, should be very few miliohms. measure from the fridge ground to chasssis and should be the same
Make sure all your connections are tight with good metal to metal contact