it has blown the #29 fuse more than once?

2013 CHEVROLET EXPRESS

103,843 MILES • 6.0L • V8 • 2WD • AUTOMATIC

DWAYNEANDDANIELLE

MEMBER
2 POSTS
FOLLOW

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)

Aug 3, 2023 at 12:34 PM

STRAILER

CERTIFIED EXPERT
53,872 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.

Images (Click to enlarge)

Aug 3, 2023 at 4:40 PM

DWAYNEANDDANIELLE

MEMBER
2 POSTS

My apologies, 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 the 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)

Aug 3, 2023 at 6:39 PM

DWAYNEANDDANIELLE

MEMBER
2 POSTS

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?

Aug 4, 2023 at 1:15 PM (Merged)

STRAILER

CERTIFIED EXPERT
53,872 POSTS

Did you try the relays? or just remove them to see if the fuse blows?

Aug 4, 2023 at 1:16 PM