1991 GMC Sonoma AC blows fuse

1991 SONOMA

MEMBER
1991 GMC SONOMA
6 CYL
2WD
AUTOMATIC
452,000 MILES

I have an issue with my AC blowing the fuse. The compresser is only 8 months old. The fan blower circuit blows fine but as soon as I turn on the the AC the fuse blows instantly. Even a 30 amp fuse. Now I did change the relay and ohm the line from the compresser and seems OK. I suspect the diode on the connector or the actual line? Any comments to help out. Its getting hot down here in AZ.

Tuesday, May 18th, 2010 AT 9:50 PM

1 Reply

HMAC300

MECHANIC
48,601 POSTS

Have your compressor clutch checked for how many amps it's using. Also check your switch as some wires may be burnt up and touching. Also check your blower motor for draw. Even if it works, it might still be drawing to much power and blowing the fuse.

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Saturday, May 22nd, 2010 AT 8:41 AM