AC fuse blows
Thread Starter
Burning Brakes
Joined: Apr 2009
Posts: 877
Likes: 0
From: Broken Arrow Oklahoma
AC fuse blows
90 Vette, AC has worked perfect until a week ago. got in it started it up and it blew the fuse replaced it and it blew again.
put in another and it worked for about 15 minutes. thinking it might be the clutch I disconnected it and it still blew the fuse.
Any Ideas?
put in another and it worked for about 15 minutes. thinking it might be the clutch I disconnected it and it still blew the fuse.
Any Ideas?
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
Harness or circuit is from the fuse to the Clutch Relay, which when grounded by the ECM, flows directly to the Clutch. To narrow it down, remove the Relay. If the fuse no longer blows, you could try a new Relay, but make sure the wire doesn't have a bare spot rubbing up against the engine, chassis, etc. Make sure that the Relay Connector is in good shape - pins aren't touching.
Advanced
Joined: May 2009
Posts: 50
Likes: 0
From: Pennsauken NJ
There is also a brown wire for the ac which comes off the alternator and runs down the front of the block past the smog pump and crank pulleys. Make sure one of the pulleys isnt cutting into the harness.
Thread Starter
Burning Brakes
Joined: Apr 2009
Posts: 877
Likes: 0
From: Broken Arrow Oklahoma
update.
when I bought the car the compressor wouldn't engage, turned out to be the green wire from the ECM to the low pressure switch.
I used a jumper to check and it worked. I didn't cut the wire so whatever was shorted out in the first place finally wiggled down and was blowing the fuse. I cut the wire and all is well. one of these days when I have the car up on a lift I will repair the original wire. So Far it hasn't blown it again.
Thanks to all who responded.
when I bought the car the compressor wouldn't engage, turned out to be the green wire from the ECM to the low pressure switch.
I used a jumper to check and it worked. I didn't cut the wire so whatever was shorted out in the first place finally wiggled down and was blowing the fuse. I cut the wire and all is well. one of these days when I have the car up on a lift I will repair the original wire. So Far it hasn't blown it again.
Thanks to all who responded.
