Ford Mustang Forum banner
Status
Not open for further replies.
1 - 7 of 7 Posts

·
Registered
Joined
·
5 Posts
Discussion Starter · #1 ·
I have a 2007 Mustang. The wipers have stopped working and the a/c won't blow air. I checked the fuses and they were blown, so I replaced them and they blew again. When you start the car, the wiper fluid comes out on it's own, but the wipers won't work. I had a water leak on the passenger side, but that was fixed 2 weeks ago. Just wondering if that is pat of the problem, and if it is, why is it only affecting the wipers and a/c?
 

·
Registered
Joined
·
1,274 Posts
The smart junction box may very well be damaged, but that usually doesn’t cause fuses to blow. Blowing fuses indicates a short(s) somewhere. You don’t indicate which fuses blew (at least not by fuse number and location), so it’s hard to be specific in a reply. Here’s the wiring diagrams for the wiper control module, which may have damage, and also the climate control module. Could be some kind of module failures, or it could be an abraded harness somewhere. This is the sort of thing it might be easier to let a dealer track down.

Ford Service Manuals - Wiring Diagrams

Ford Service Manuals - Wiring Diagrams
 

·
Registered
Joined
·
1,452 Posts
Blown Fuses

Well, we need to know if you want to attempt to fix this problem yourself or if you are going to a mechanic or friend for further help ?

If the fuses which blew are in the fuse box inside the car, that fuse box and it's related electronics are called the Smart Junction Box, as mentioned by others in above posts.

If water gets into that box, which it can, depending on just where your water leak was from, then water can create numerous problems. If you had no electrical problems before the water leak , but do now, either water is still leaking into the SJB, or corrosion has started from a previous leak. If water is currently inside that fuse box, drying the water out might fix the problem of blowing fuses, but someone then must figure out if there is still a leak which was not properly fixed in the past attempt.

We need more information from you as to which fuses blew...which numbered fuses in the Mustang Owner's Guide (glove box manual).

Is there any chance that your car is still under Ford Factory Warranty, or are you on your own at this point ?

We do also have available a Technical Service Bulletin which describes how to diagnose a water leak into the front floor area of these cars. Attaching same, which has wording, tech illustrations, and a very clear picture of areas where water can leak into cabin of car. Maybe your water leak was not completely fixed and needs further diagnosis ?

Please let us know if you need further help or advise about how to deal with the problem or who is going to work on it.
 

Attachments

·
Registered
Joined
·
5 Posts
Discussion Starter · #5 ·
The fuse that keeps blowing is #3. I pulled the SJB out and it has some corrosion and I cleaned that, put it back together and it didn't help. When I start the car the wiper fluid comes out, the wipers won't work, and the a/c blows for about 20sec, then blows the fuse again. My keyless entry is now acting up as well. I have fixed the leak 2 wks ago and didn't have any of these problems before. I guess that I am going to have to take it to the dealer..I'm not sure what's going on. This problem really sucks! It's only a 2007 with 6,000 miles..can't believe that I am having these problems, and it's not under warranty anymore.
 

·
Registered
Joined
·
1,452 Posts
That fuse #3 (10amp) is for Blower Motor Relay AND Wiper Motor. The washers are on a separate fuse.

That power does go through a 36 pin connector which is at the bottom rear of the Smart Junction Box. Note: there are two electrical connectors on the front of the SJB and 6 electrical connectors on the rear of the SJB.
The door locks are also in wires of the above mentioned electrical connector...so it makes sense that they might be the next thing to have a problem with.

The SJB is an expensive part. If it were me, I would lst try to get the dealer to cover the problem...as a condition which existed while the car was still under warranty...Not easy to do though.
It is not clear as to whether or not you fixed the leak or a Dealership fixed it ?
You may contact me further with a private message to me if you want further help...or if you would like to call me on the phone for help.
Failing any Dealership help, If it were me, I'd make further attempts at removing the corrosion from the SJB...anything to avoid having to buy a new part.
 

·
Registered
Joined
·
11,864 Posts
man, i gotta go with s197. disconnect the batt and maybe you will get lucky cleaning the connectors real good. use some contact cleaner. be sure to post back on this one whats going on. i have to agree blowing the fuse sounds like a short, maybe in some wires. trace the wires from the sjb for a visual
 
1 - 7 of 7 Posts
Status
Not open for further replies.
Top