Pre-Power Stroke Diesel (7.3L IDI & 6.9L) Diesel Topics Only

Tow pkg wiring, fuses? Diagram?

Thread Tools
 
Search this Thread
 
  #1  
Old 08-14-2013, 02:33 PM
jeffbradbury7's Avatar
jeffbradbury7
jeffbradbury7 is offline
Freshman User
Thread Starter
Join Date: Feb 2011
Posts: 36
Likes: 0
Received 0 Likes on 0 Posts
Tow pkg wiring, fuses? Diagram?

91 F350 no power at rear bumper tow pkg wiring for running lights, or 12v hot, are there extra fuses somewhere?

8 wires-I figured the easy 4, anyone have a diagram? or know the colors
 
  #2  
Old 08-15-2013, 01:10 AM
tecgod13's Avatar
tecgod13
tecgod13 is offline
Logistics Pro
Join Date: Sep 2007
Location: Western Mass
Posts: 3,567
Received 119 Likes on 100 Posts
I believe there is a relay on the driver's side fender. I'm not sure if its supposed to be mounted, or just kinda laying there (the relay on my truck was busted and just laying there) I ended up bypassing the relay and installing my own set of relays in the rear of the truck.

I had traced everything at one point, but don't have those papers handy at the moment. You might want to just trace it out and see where it goes as it might be modified by a previous owner.
 
  #3  
Old 08-15-2013, 02:21 AM
ifrythings's Avatar
ifrythings
ifrythings is offline
Laughing Gas
Join Date: Aug 2011
Posts: 1,086
Likes: 0
Received 84 Likes on 67 Posts
If the wiring is stock,

1)does the running lights on the truck work? if so then the relay is getting power to turn on,

2)There is a fusible link that powers this circuit, its a blue link that feeds a yellow wire, see if that's blown or not,

3)If all above is good, change the relay and check for any bad wiring or corroded plugs.

The relay "should" be in a plastic toped hanger and say trailer relay or something close to that, it will be on the drivers side and should be between the coffee can (if you have one) and the firewall.
 
  #4  
Old 08-15-2013, 11:37 PM
FordTruckfan89's Avatar
FordTruckfan89
FordTruckfan89 is offline
Fleet Mechanic
Join Date: May 2013
Location: NC
Posts: 1,256
Received 4 Likes on 3 Posts
The relay only powers the trailer wiring, not the truck marker lights, unplug it an see. It just takes the trailer lighting load off the headlight switch, so it doesn't mess up.
 
  #5  
Old 08-18-2013, 01:55 PM
jeffbradbury7's Avatar
jeffbradbury7
jeffbradbury7 is offline
Freshman User
Thread Starter
Join Date: Feb 2011
Posts: 36
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by ifrythings
If the wiring is stock,

1)does the running lights on the truck work? if so then the relay is getting power to turn on,

2)There is a fusible link that powers this circuit, its a blue link that feeds a yellow wire, see if that's blown or not,

3)If all above is good, change the relay and check for any bad wiring or corroded plugs.

The relay "should" be in a plastic toped hanger and say trailer relay or something close to that, it will be on the drivers side and should be between the coffee can (if you have one) and the firewall.

the truck running lights work, with them on there is no power at the relay.
where is the fusible link, is it by the relay, or somewhere else
 
  #6  
Old 08-18-2013, 04:37 PM
jeffbradbury7's Avatar
jeffbradbury7
jeffbradbury7 is offline
Freshman User
Thread Starter
Join Date: Feb 2011
Posts: 36
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by ifrythings
If the wiring is stock,

1)does the running lights on the truck work? if so then the relay is getting power to turn on,

2)There is a fusible link that powers this circuit, its a blue link that feeds a yellow wire, see if that's blown or not,

3)If all above is good, change the relay and check for any bad wiring or corroded plugs.

The relay "should" be in a plastic toped hanger and say trailer relay or something close to that, it will be on the drivers side and should be between the coffee can (if you have one) and the firewall.

Thank you for all the help
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
tbenks
Electrical Systems/Wiring
5
01-31-2020 05:29 PM
puman
Aerostar
3
03-01-2015 10:16 PM
johnsjsj
1999 - 2003 7.3L Power Stroke Diesel
2
03-07-2013 09:05 AM
Midnite1987
1987 - 1996 F150 & Larger F-Series Trucks
3
04-03-2012 05:13 PM
EPNCSU2006
1987 - 1996 F150 & Larger F-Series Trucks
1
04-14-2003 11:48 PM



Quick Reply: Tow pkg wiring, fuses? Diagram?



All times are GMT -5. The time now is 05:49 AM.