Horn and SJB Questions

[DBcooper]

The horn on the steering wheel has not worked on my 05 GT since I bought the car. It does work when I push the lock button twice on the key fob. All of the fuses and relays are good (verified with multimeter). I cleaned the terminals on the steering wheel switch and everything associated with it seems to be working properly. I have no power at the horn when the steering wheel switch is pushed in. I figured there has to be something wrong with the clock spring so I changed it out with a new one but still no horn.

I was thinking I had a broken wire somewhere so I was going to try to determine if it was before or after the smart junction box. After removal of the SJB I found this:


The broken connector is #39 on C2280b. This corresponds with "horn switch, control". I am 99.9% sure that this is my problem. My questions: is this something that can be fixed? If so, any ideas who to take it/send it to? I really don't want to buy a new SJB just to fix the horn if I don't have to. If it does come to a new SJB, will the installation be plug and play? Or will I have to have Ford reprogram?

Thanks for your help!

 

[DBcooper]

For reference, the plug with the broken pin is the one to the left of the fomoco sticker

 

[LikeabossTM]

Only way i can see to 'fix' that other than replacing the sjb is to open it up and replace the pin (or solder on an extension to the broken one).

It's gonna look something like this after you open it up, obviously with one of the pins much shorter than it should be.

You'd have to be pretty confident with finicky work from the looks of things.

 

[Badd GT]

https://circuitboardmedics.com/

I would contact these people

 

[DBcooper]

Only way i can see to 'fix' that other than replacing the sjb is to open it up and replace the pin (or solder on an extension to the broken one).

It's gonna look something like this after you open it up, obviously with one of the pins much shorter than it should be.

You'd have to be pretty confident with finicky work from the looks of things.

Thank you for your help. I don’t have the guts to tear into that. But very good to know it can be fixed. Thank you!

 

[DBcooper]

https://circuitboardmedics.com/

I would contact these people

I am going to call them tomorrow. I will update with the quote I’m given. Am I crazy hoping for around 100 bucks if I pay shipping both ways?

 

[Badd GT]

I am going to call them tomorrow. I will update with the quote I’m given. Am I crazy hoping for around 100 bucks if I pay shipping both ways?

I had them rebuild the instrument clusters in my 06 mustang and 03 express van and iirc ran about $150 each including shipping and the best part was turn around time was 3 days.

 

[datmbn]

C2280b 39 is just an pass through to C2280c 29 so you kan make an external conection of this to to make it work

 

[07 Boss]

I should check my SJB, I horn and headlights stopped working like a year or two ago and have never really looked into it.

 

[Derby]

Save yourself some trouble and replace the sjb. You can send yours out or buy a good used unit fairly cheap. Your sjb has obviously been exposed to water. I would find the leak/leaks to prevent further issues.

 

[DBcooper]

Save yourself some trouble and replace the sjb. You can send yours out or buy a good used unit fairly cheap. Your sjb has obviously been exposed to water. I would find the leak/leaks to prevent further issues.

Leaks have all been fixed. If I were to buy a used unit, would it need to be reprogrammed by ford?

 

[Derby]

I just replaced the sjb in my sons 07. Plug and play. Everything worked like it should. I did order the same part number if that makes any difference.

 

[DBcooper]

Just to update this thread - repairing my SJB would cost me well north of $200. With all the corrosion that it has, I was concerned that I would run into more problems in the future. I found a used one with the exact same part number on fleabay for $230 bucks shipped. I went ahead and jumped on it.

Seems pretty cheap compared to the $2400 that I was quoted by my local ford dealer haha.

 

[DBcooper]

Now I just need to figure out a way to get the broken pin out of the plug. Hopefully it isn't too hard to dig out

 

[AnthonyBirge07]

Use a toothpick and push it out of harness from the back , also when you reinstall the new sjb grab a 1 gallon zip lock bag and slice one side , put the sjb in the bag zip part on bottom and sliced side towards door it will keep any draining water from getting in and destroying the new one.

 

[DBcooper]

Just to update for anybody who may run into this problem in the future - the new SJB was indeed plug and play and it did fix the horn issue. I did have to reprogram the key fobs but that only takes about 30 seconds.

Next step - find out why the car keeps going through blower motor resistors

 

[Juice]

[QUOTE="DBcooper, post: 2526156, member]
Next step - find out why the car keeps going through blower motor resistors[/QUOTE]
Probably the blower motor is drawing too much current.