GM Repair Problems? Ask GM Repair Expert Now.
Hi there. Welcome to our site!
This is one of those systems that make you wonder what the heck they were thinking about as they worked on it.
Please give me a couple of minutes to mull over the diagram and see if I can figure out a solution. Be right back!
I have a feeling the problem might be fuse 66 (30 amp - see attached graphic) in the underhood fuse box (GM calls it the "Underhood Electrical Center" - go figure...). Please check and see if there's current going through it and let me know.
71 is listed on the graphic I attached for you as a 40 amp fuse. It's never a good idea to replace a possibly burnt fuse with another one of even higher amperage. I think it'd be best if you waited until you got that test equipment
Better safe than sorry....