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chevygeorge
chevygeorge, ASE Certified Technician
Category: Chevy
Satisfied Customers: 53
Experience:  GM Technician for over 25 years
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I have no dash power or lights and my truck won't crank

Customer Question

I have no dash power or lights and my truck won't crank over
JA: Have you checked the fuses? Have you tested the dashboard light bulbs?
Customer: I went to jump a motor and the negative cable slipped off hit the positive then my truck died
JA: What is the model/year of your Chevy?
Customer: It is a 2011 gmc Serra 1500 5.3
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: None of my gauges will come on either
JA: Anything else you think the mechanic should know?
Customer: There is this lil fuse that is on my battery on the positive terminal that's attached to the cable that goes to my altamator
Submitted: 4 months ago.
Category: Chevy
Expert:  chevygeorge replied 4 months ago.
Hello. My name is George.
Expert:  chevygeorge replied 4 months ago.

I'm here to assist you today. It sounds like you may have blown the main maxi-fuse. Let me pull up the document.

Expert:  chevygeorge replied 4 months ago.

It's a 175 Megafuse located at the positive terminal. When this blows, it essentially isolates the battery from the electrical system. It cannot be verified by sight, but can be checked for continuity(ohms) or by checking for voltage across the fuse.

https://www.dropbox.com/s/rgh7a0p5faz3dzw/megafuse.pdf?dl=0

Expert:  chevygeorge replied 4 months ago.

It worked as designed by preventing damage to the electrical system from the short.

They're inexpensive and attached with 2 10mm nuts.

http://www.autozone.com/electrical-and-lighting/fuse/bussmann-fuse/32346_0_0/

Expert:  chevygeorge replied 4 months ago.

Please take the time to rate my service today. I strive for excellent service, so feel free to let me know how I can assist you in the best manner.
Please note, we can continue our conversation even after rating. Thank you, George.