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Why does my 50a breaker blow when I plug in my 30a circuit breaker in my 2004 GMC Yukon?

Tiny
SUPER6ER
  • MEMBER
  • 2004 GMC YUKON
  • 100,000 MILES
Both driver and passenger seats have lost power. Seat heaters also do not work. The 50a fuse under the hood (mbec) blows when 30a seat circuit breaker is plugged in and the 30 a circuit breaker arcs and gets really hot.
Wednesday, October 26th, 2011 AT 12:59 AM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Because the 30 is underrated for the current draw. I would not mess with this as you may cause much larger issues. Have a tech find your fault and repair it before you cause a fire or worse.

Roy
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Wednesday, October 26th, 2011 AT 1:53 AM

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