The Autonerdz Community Forums

The Autonerdz Community Forums
https://yabb.autonerdz.com/cgi/yabb2//YaBB.pl >> >> Ford Central Junction Box Repair https://yabb.autonerdz.com/cgi/yabb2//YaBB.pl?num=1495231070 Message started by Schumi on May 19^th, 2017 at 1:57pm

Title: Ford Central Junction Box Repair
Post by Schumi on May 19^th, 2017 at 1:57pm

Hi guys, I'm looking for some advice. I am wondering if anyone could suggest a place to have a central junction box repaired. It is for an 04 Ford Excursion 5.4. The problem is the fuel pump relay is bad, which is internal to the box.

The part is obsolete from Ford. I told the guy if worse came to worse, I could wire in a relay external to the box, but he said he'd like to not rig it.

If anyone has any suggestions, I would love to hear them. Thanks in advance.

-Andy

Title: Re: Ford Central Junction Box Repair
Post by AFM on May 19^th, 2017 at 4:26pm

http://www.ebay.com/itm/2002-2007-EXCURSION-F-250-550-SUPER-DUTY-FUSE-BOX-BCM-REPAIR-SERVICE-/272511628847?hash=item3f72f5762f:g:8VIAAOSwnHZYbqFR&vxp=mtr

If you wanted to do the repair yourself, post a picture of the relay/relays to determine what it is to source it. If it is the same as other CJBs which have the part # F8VF-BA then the relay G8QN-1C4-DC12 should work fine. Google it to find a supplier.

Title: Re: Ford Central Junction Box Repair
Post by fisher on May 19^th, 2017 at 7:25pm

You might have to go to a wrecking yard, buy one and cut it apart as a sacrificial learning relay module.

Title: Re: Ford Central Junction Box Repair
Post by Schumi on May 22^nd, 2017 at 6:27am

Thanks for the suggestions. I ended up going the eBay route.

If this were my own, I probably would have mounted an external relay, but it's not, so I did what the guy wanted and decided to have it repaired.

I took the fuse box apart enough to find that the fuel pump relay has a hole in the side of it. Believe it or not this thing only stalls intermittently, even though the fuse block smells like an electrical fire.

Thanks for the help.

-Andy

Title: Re: Ford Central Junction Box Repair
Post by Abndanger on May 22^nd, 2017 at 10:30am

Personally Andy you could have installed a used one without issues. There is no programming of the CJB. But this is a common failure.

Just did a used one last week for a customer.

Title: Re: Ford Central Junction Box Repair
Post by Schumi on May 22^nd, 2017 at 11:33am

Abndanger wrote on May 22^nd, 2017 at 10:30am:

you could have installed a used one without issues.

Abndanger wrote on May 22^nd, 2017 at 10:30am:

this is a common failure.

This is exactly why I didn't install a used one.

The place I sent it to says it has a lifetime warranty.

I'm still baffled that they don't make these anymore. It's not just some little trim piece, it makes the fuel pump operate. Oh well, I guess there's always a way around it.

-Andy

Title: Re: Ford Central Junction Box Repair
Post by Schumi on May 31^st, 2017 at 1:51pm

Just to update, I did go the eBay route. Got the part back and put it in, all is well. Thanks for the advice.

-Andy

Title: Re: Ford Central Junction Box Repair
Post by superskyliner34 on Jul 13^th, 2017 at 7:05am

Andy, these internal relays are great when the problem is intermittent, access makes it a challenge in diagnosis. ;D

Title: Re: Ford Central Junction Box Repair
Post by Schumi on Jul 24^th, 2017 at 8:51am

Jose aka superskyliner wrote on Jul 13^th, 2017 at 7:05am:

Andy, these internal relays are great when the problem is intermittent, access makes it a challenge in diagnosis.

Yeah, this thing started as a very intermittent problem. Luckily with a little work I could get to the wires I needed to.

-Andy