It has blown the #29 fuse more than once?

Tiny
DWAYNEANDDANIELLE
  • MEMBER
  • 2013 CHEVROLET EXPRESS
  • 6.0L
  • V8
  • 2WD
  • AUTOMATIC
  • 103,843 MILES
Okay, I have the vehicle listed above 3500, 15 passenger van, I have replaced the rear blower, resistor, resistor pigtail and plug, and it still keeps blowing fuses! What should I look at next? It has blown the #29 fuse more than once, before I changed the blower and resistor. The #29 fuse is the rear blower fuse, located in the under driver's seat fuse box and it is a 30-amp j-body female fuse, I believe. (Small "Lego"-looking brick with a clear lid)
Thursday, August 3rd, 2023 AT 12:34 PM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,755 POSTS
There is a rear blower control relays (3) I would disconnect and then replace the fuse to test the power lead wire to ground and then reinstall the relays one at a time until the fuse blows. Here are the wiring diagrams so you can see how the system works and the location of the relays.
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Thursday, August 3rd, 2023 AT 4:40 PM
Tiny
DWAYNEANDDANIELLE
  • MEMBER
  • 2 POSTS
  • 2013 CHEVROLET EXPRESS
  • 6.0L
  • V8
  • 2WD
  • AUTOMATIC
  • 103,874 MILES
Okay I have the 15-passenger van listed above. I have replaced the rear blower fan, the resistor, and the pigtail/plug. With all of that the van still keeps blowing the #29 rear blower fuse under the driver's seat fuse box. It will run fine for 5 or 6 minutes then blow the fuse. The fuse is a 30 amp. Any ideas what to look at next?
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Friday, August 4th, 2023 AT 1:15 PM (Merged)
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,755 POSTS
Did you try the relays? Or just remove them to see if the fuse blows?
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Friday, August 4th, 2023 AT 1:16 PM

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