C68 Problem
Thread Starter
Team Owner
Joined: Jul 2004
Posts: 28,502
Likes: 3,302
From: Hartford WI
C68 Problem
On my 91, every now and then, it shorts out the 10A fuse for the AC. I have been reduced to carrying a few 10A fuses to make sure I don't drive without AC. Changed to another C68 controller and it does the same thing. I could install a 15A fuse but I'd really rather not do that. Even if it works, all it does is mask the problem. Does anyone know what the solution is? What is it that draws that much power to blow the fuse? Any suggestions? TIA
Thread Starter
Team Owner
Joined: Jul 2004
Posts: 28,502
Likes: 3,302
From: Hartford WI
I do have a wiring diagram. Problem is that it can do it in the driveway when the car is idling or when you are driving. Nothing that can be linked to a short caused by bumps. Hoping someone has some "usual suspects" that I can look at.
Melting Slicks
Joined: May 2010
Posts: 2,082
Likes: 3
From: Conowingo Maryland
Not trying to be a smart *** but are you sure it is suppose to have a a 10 amp fuse in it. It seemed low as soon as I read the post so I just checked my 89 it is 25 amp. and the other vehicle I have is the same just worth dubble checking the owners manual.
Thread Starter
Team Owner
Joined: Jul 2004
Posts: 28,502
Likes: 3,302
From: Hartford WI
That is what is stamped on the fuse panel under AC. Owners manual says the same thing.
Drifting
Joined: Jun 2010
Posts: 1,853
Likes: 8
From: Westerly RI
My car is a '92 and maybe the wiring is similar. The a/c fuse also powers other functions. You might have a short to ground anywhere in the circuit. In my diagram, the circuit is brown and there is a splice
S238 behind the right side of the dash near the radio receiver.
BTW, I deleted my previous reply because I realized it was not too helpful.
S238 behind the right side of the dash near the radio receiver.
BTW, I deleted my previous reply because I realized it was not too helpful.
Thread Starter
Team Owner
Joined: Jul 2004
Posts: 28,502
Likes: 3,302
From: Hartford WI
My car is a '92 and maybe the wiring is similar. The a/c fuse also powers other functions. You might have a short to ground anywhere in the circuit. In my diagram, the circuit is brown and there is a splice
S238 behind the right side of the dash near the radio receiver.
BTW, I deleted my previous reply because I realized it was not too helpful.
S238 behind the right side of the dash near the radio receiver.
BTW, I deleted my previous reply because I realized it was not too helpful.
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Thread Starter
Team Owner
Joined: Jul 2004
Posts: 28,502
Likes: 3,302
From: Hartford WI
Dunno. When the fuse blows, the entire cluster goes dark and the AC goes off so nobody knows. I will have to try dig out my FSM which is somewhere at the bottom of the pile when I moved.
Drifting
Joined: Jun 2010
Posts: 1,853
Likes: 8
From: Westerly RI
If you look at the wiring diagram for the fuse panel, you will see that circuit 50, thru the a/c fuse, sends power to the CCM and the rear defogger as well as the a/c system. If you can isolate the feeds you might be able to find a short, by temporarily removing them from the circuit. Your FSM will likely have some diagnostic help, in section 8A-4, if it is like the 92 book.
(Disclaimer- Don't know how similar the wiring is on '91 and '92)
(Disclaimer- Don't know how similar the wiring is on '91 and '92)
