Need clarification/help with trailer brake wiring on 97 E150 - Ford Truck Enthusiasts Forums

Go Back  Ford Truck Enthusiasts Forums > Ford Vans and other vehicles > 1968-2013 Full Size Vans
Reload this Page >

Need clarification/help with trailer brake wiring on 97 E150

Notices
1968-2013 Full Size Vans Econolines. E150, E250, E350, E450 and E550

Need clarification/help with trailer brake wiring on 97 E150

 
  #1  
Old 06-29-2017, 08:34 AM
Ryan Greene
Ryan Greene is offline
New User
Thread Starter
Join Date: Jun 2017
Posts: 12
Ryan Greene is starting off with a positive reputation.
Need clarification/help with trailer brake wiring on 97 E150

hello all. I'm new to this forum and I need some help.

I Am trying to put trailer brakes on my 97 E150 without factory tow. I have already installed a 4 way flat harness and a hitch last year. 4 way I used is the T harness at the tail lights.
I ordered a prodigy P2 and the adapter harness. I have found the connector along the left toekick area in the cab.

I searched he'd for the plug by the rear left tire and didn't find one. Now from what I've read I should at least find a single plug and if it doesn't have factory tow then I may not find the one with the blue and orange wires feeding it. I'm not finding either one.
I'd like to verify that if I do not have factory tow then could I possibly still have the plug I need at the rear? And if I do not have the plug at the rear, where can I find those wires up front? I really don't want to run wires in to the drivers area and have to cut them off the plug out of the brake controller. I'd like to keep it cleaner then that but I need trailer brakes on my camper more then that.

Lastly what about the relays and fuses for the controller? I was reading that some guys need to find a relay box and use that. Is that a box from a factory tow unit? Will my brake controller not power up until I have that? Thanks for reading.
 
  #2  
Old 06-29-2017, 06:54 PM
98Econoline150's Avatar
98Econoline150
98Econoline150 is offline
Senior User
Join Date: Jan 2011
Location: Chicago
Posts: 478
98Econoline150 is starting off with a positive reputation.
Here is an article. Hope it helps.

https://www.etrailer.com/faq-Ford-Fu...ontroller.aspx
 
  #3  
Old 06-29-2017, 11:33 PM
Sam I Am's Avatar
Sam I Am
Sam I Am is online now
Posting Guru
Join Date: Jun 2009
Location: Fort Smith, Arkansas
Posts: 1,684
Sam I Am has a good reputation on FTE.Sam I Am has a good reputation on FTE.Sam I Am has a good reputation on FTE.
Originally Posted by Ryan Greene View Post
hello all. I'm new to this forum and I need some help.

I Am trying to put trailer brakes on my 97 E150 without factory tow. I have already installed a 4 way flat harness and a hitch last year. 4 way I used is the T harness at the tail lights.
I ordered a prodigy P2 and the adapter harness. I have found the connector along the left toekick area in the cab.

I searched he'd for the plug by the rear left tire and didn't find one. Now from what I've read I should at least find a single plug and if it doesn't have factory tow then I may not find the one with the blue and orange wires feeding it. I'm not finding either one.
I'd like to verify that if I do not have factory tow then could I possibly still have the plug I need at the rear? And if I do not have the plug at the rear, where can I find those wires up front? I really don't want to run wires in to the drivers area and have to cut them off the plug out of the brake controller. I'd like to keep it cleaner then that but I need trailer brakes on my camper more then that.

Lastly what about the relays and fuses for the controller? I was reading that some guys need to find a relay box and use that. Is that a box from a factory tow unit? Will my brake controller not power up until I have that? Thanks for reading.
Since your van has the connector for the controller, the fuse box under the hood will have the circuits for the trailer brake relays and fuses. Check your owners manual to be certain which spaces in the fuse box need to be populated and the proper fuse rating to make those circuits function as designed.

After that you need to find the bolt together connector next to the left side exhaust manifold. You will need to be under the van to see this. It may or may not help to have the doghouse off when you are working in this area. You will know after you crawl under there and see the connector. Find the connector, check to see if the proper wire colors run through it or stop there at it. Then tap into the circuit as needed, or re-pin that connector. Run the wires you need to the back.

This is something you want to have to do only once, so do a quality splice job on the wires. I much prefer to solder something important like this.
Do it right and you will never have to touch it again.

It is really not too difficult to do, just be sure to wear eye protection because you will be looking up at the underside of a used vehicle and there WILL be dirt dropping on you.
 
  #4  
Old 06-30-2017, 11:45 AM
Ryan Greene
Ryan Greene is offline
New User
Thread Starter
Join Date: Jun 2017
Posts: 12
Ryan Greene is starting off with a positive reputation.
I don't have an owners manual. Need to order one. I did look at the distribution box under the hood and don't see any empty spots that have contacts in them so maybe someone threw them in even though they are not needed. I'll just be happy if I don't need to add a different box in. I will look for that connector this weekend to see if any blue or orange runs through it or stops there. My controller comes today so I'm hoping I can get that powered up easy enough, and then I can easily verify the proper wires under the van When I find a blue and orange someplace. Thanks for your input. I will report my finding.
 
  #5  
Old 06-30-2017, 12:05 PM
Sam I Am's Avatar
Sam I Am
Sam I Am is online now
Posting Guru
Join Date: Jun 2009
Location: Fort Smith, Arkansas
Posts: 1,684
Sam I Am has a good reputation on FTE.Sam I Am has a good reputation on FTE.Sam I Am has a good reputation on FTE.
  #6  
Old 08-08-2017, 12:06 PM
Ryan Greene
Ryan Greene is offline
New User
Thread Starter
Join Date: Jun 2017
Posts: 12
Ryan Greene is starting off with a positive reputation.
Progress so far

ok so I couldn't find much around for wire so I ended up using a black heavy duty 12/3 cord to run back the van.

I verified and re verified that the wires went into the plug by the footwell and so not come out the other side. I cut and connected the blue and orange and then verified power to the blue wire when using the manual lever on the prodigy controller.
I also checked the orange and it's only about 11.75 volts. Would that be the relay possibly taking away a little voltage?

The he real question is, do I need to cut the black ground out of that harness on the one corner? I'm grounding theough the frame at the eyelet at the 7 way so I'm thinking no but am I better off using the ground from there too?
 
  #7  
Old 08-08-2017, 01:52 PM
Sam I Am's Avatar
Sam I Am
Sam I Am is online now
Posting Guru
Join Date: Jun 2009
Location: Fort Smith, Arkansas
Posts: 1,684
Sam I Am has a good reputation on FTE.Sam I Am has a good reputation on FTE.Sam I Am has a good reputation on FTE.
Where exactly is the 11.75V measured? And what is the exact voltage at the battery posts? If this is measured with the engine not running, it may make all the difference to have it running.
The voltage drop could be from the relay, too heavy wire gauge, or poor quality wire splice. Or if you sourced a section of wire that is not new, it could possibly be damaged internally in a way that is not externally visible.

The black wire should be trailer reverse. Depending on the trailer it will either be used to deactivate the trailer brakes for moving the trailer backwards or activating backup lights on the trailer or possibly even both. Check the black wire to see if it has a pink or green stripe on it, if so it is the trailer reverse. Otherwise, ground is ground and it won't matter where you connect the ground as long as it is a clean solid connection to the frame.
 
  #8  
Old 08-08-2017, 02:03 PM
Ryan Greene
Ryan Greene is offline
New User
Thread Starter
Join Date: Jun 2017
Posts: 12
Ryan Greene is starting off with a positive reputation.
Now that you mention that about the black wire I'm almost certain it had a green stripe. I won't worry about it then.

I measured that voltage with engine off right when I cut the orange out of the harness. I am unsure of battery voltage exactly, and was more trying to verify it was active but will check out the relay and see if changing it makes a difference. I did check power on the green(blue) at the rear just to see if the unit worked and read 5.7 volts while the display read 6.3 so once I get the plug mounted this afternoon I'm good to go

I appreciate the help from all of you.
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
dawhits1
1987 - 1996 F150 & Larger F-Series Trucks
28
06-19-2018 10:06 AM
NO_SPRK
1987 - 1996 F150 & Larger F-Series Trucks
29
01-28-2018 09:58 PM
OldBlackCat
1968-2013 Full Size Vans
7
10-30-2016 03:30 PM
kell104
1987 - 1996 F150 & Larger F-Series Trucks
7
05-29-2016 02:56 AM
Rolling7
2009 - 2014 F150
1
04-04-2016 10:15 PM


Thread Tools
Search this Thread
Quick Reply: Need clarification/help with trailer brake wiring on 97 E150


Contact Us About Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.