brake controller relay
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New User
Joined: Sep 2004
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brake controller relay
I got the wiring harness and relay from the dealer for my 2000 f 250 and it says the fuse box is under the hood on the passenger side and well on mine its on the drivers side anyway the instructions show 2 banks of 3 relays but on mine all 6 relays are in a vertical row so where do I plug the relay into?
Senior User
Joined: Sep 2004
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Can your dealer's service manager let you see the wiring diagram for the truck? It is, of course, in a volume of the dealer shop manual. How is your top for your relay box labelled??
Did instructions come with the harness and relay package? (No, that is NOT trying to be a jerk toward you; rather, sometimes, Ford packages them in a tiny envelope in the bottom of the box underneath--at least partially--one of the folds in the box.)
Try to leave a post, too, for Bob Ayers over in the miscellaneous wiring and electrical section of the forums. He is quite knowledgable on electrical matters--as is Franklin2.
73custom has several wiring diagrams as well, if I understand correctly.
I hope, at the very least, this gives you some more leads to investigate.
Did instructions come with the harness and relay package? (No, that is NOT trying to be a jerk toward you; rather, sometimes, Ford packages them in a tiny envelope in the bottom of the box underneath--at least partially--one of the folds in the box.)
Try to leave a post, too, for Bob Ayers over in the miscellaneous wiring and electrical section of the forums. He is quite knowledgable on electrical matters--as is Franklin2.
73custom has several wiring diagrams as well, if I understand correctly.
I hope, at the very least, this gives you some more leads to investigate.
Elder User
Joined: Apr 2004
Posts: 797
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From: Wickenburg, AZ
Is it a super duty or a regular F250? I think the setups are different...Relay arrangements will be in the owner's manual or on the lid of the power distribution box. You might need both to do it, though.
FTE Chapter Leader
Joined: Feb 2004
Posts: 14,904
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From: Wayland, MI
In 2000 there should be a small black box (by the main fuse box under the hood) it will most likely have some black tape on it also. open that little box, there is only room for two relays cover it back up and tape it closed and you're good to go.
Toyman
Toyman
FTE Legend
Joined: Jan 2006
Posts: 37,918
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From: Princeton, BC
Originally Posted by Toyman
In 2000 there should be a small black box (by the main fuse box under the hood) it will most likely have some black tape on it also. open that little box, there is only room for two relays cover it back up and tape it closed and you're good to go.
Toyman
Toyman
Postmaster
Joined: Nov 2003
Posts: 3,595
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From: Utah County, UT
Originally Posted by Zip
I think this may apply to my issue as well. I have no power to charge my trailer battery. Am I correct to assume one of these relys will rectify my problem. Both spots are empty now. In my manual the relay is in spot #39 I think. So assuming again that one of the spots in this smaller box is #39 adding a relay would fix my charging issue. Am I correct. I think all other fuses are installed and functioning.
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FTE Legend
Joined: Jan 2006
Posts: 37,918
Likes: 178
From: Princeton, BC
Did it yesterday. Got a relay and boom power to my plug. I only need the one because I don't have backup lights on my trailer. Thanks
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