Guys,

I was on my way back to school from a weekend at home. 75 miles into the trip I hear a fuse popping type noise and my tach shoots to 4K.

Damn! That OD relay that I should have replaced over the summer finally came back haunt me. Sometimes the light would come on when I started the car on I hot day. So I would give the dash a whack and things would be good.

I pulled over first chance I had and looked in the fuse box. They were fine, so now I pretty much have it narrowed down to the relay. Prob is the OD light did not come on when this started. 4th just went away w/o the light coming on. The light would come on if I hit the OD lockout, so it was not a bulb failure on the dash that caused the light to be out.

So can the OD fail w/o the dash indicator coming on? I have no tools, 100 miles from home, and need to have this fixed tomorrow. There is a local garage that has some Volvo business, so I can get a relay there if that is the problem, but I am going to need some guidance to fix this if we are talking more than swapping relays.

Thanks so much.