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Ask Bluegorilla Your Own Question
Bluegorilla, Journeyman
Category: Medium and Heavy Trucks
Satisfied Customers: 29570
Experience:  14 years GM experience including GM training on the Duramax engine .
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02 c7500 have 12.5v at battery but when I tired the key on

Customer Question

02 c7500 have 12.5v at battery but when I tired the key on absolutely nothing comes on
Submitted: 2 years ago.
Category: Medium and Heavy Trucks
Expert:  Bluegorilla replied 2 years ago.
Good morning. I'm Cam
Sorry to hear about this issue.
Where at the fuse block are you testing the power? What fuse?
Customer: replied 2 years ago.
Didn't test at fuse. I tested at the terminal where the pos. Cable from the battery lands
Expert:  Bluegorilla replied 2 years ago.
Ok so 1.4v into the fuse block is an issue. Do you have a jumper cable? If so run just the positive from the battery positive to that stud and see if you can get 12v into it. If so then let's check that cable out take the battery connections sort and clean it out. We need to figure out where the poor connection is.