No power to trailer while in reverse?
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Elder User
Joined: Oct 2005
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From: Citrus Heights, CA
No power to trailer while in reverse?
I have a trailer with brakes. When I step on the brakes, the tongue of the trailer collapses and engages the trailer brakes. There is a solenoid that prevents this from happening when in reverse so that I can back the trailer. The problem is that power is not delivered through the factory plug.
I temporarily worked around this by splicing into the backup lights, and jamming the other end of the wire into the trailer end of the connector (flat 5). Obviously I'm not happy with this as a permanent solution.
Where should the voltage come from to power this solenoid?
2001 F150 SuperCrew w/ factory towing package
I temporarily worked around this by splicing into the backup lights, and jamming the other end of the wire into the trailer end of the connector (flat 5). Obviously I'm not happy with this as a permanent solution.
Where should the voltage come from to power this solenoid?
2001 F150 SuperCrew w/ factory towing package
Lead Driver
Joined: Jan 2005
Posts: 7,782
Likes: 221
From: Huntington Indiana
Sounds like you need a 7 pin configuration for the plug. Here is an example. http://www.rvlifestyles.net/Groups.a...c-a5c3db5270db
Fleet Owner
Joined: Aug 2001
Posts: 29,941
Likes: 46
From: Drummonds, TN USA
WHAT YOU ARE DESCRIBING IS A SURGE BRAKE.
You can confirm it by jacking one side up and pulling the brake drum.
If there is no magnetic brake assembly in there, you have a surge brake.
If a solenoid is disconnecting the brake on backup, and you have to jumper it - YOU HAVE A BAD CONNECTOR....
Look at your plugs, use a meter, and find the bad connection.
You can confirm it by jacking one side up and pulling the brake drum.
If there is no magnetic brake assembly in there, you have a surge brake.
If a solenoid is disconnecting the brake on backup, and you have to jumper it - YOU HAVE A BAD CONNECTOR....
Look at your plugs, use a meter, and find the bad connection.
CO River Rat
Joined: Feb 2004
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From: Lake Havasu City AZ
Dog -
If the factory plug on that 150 is a flat 4-pin you need to replace it with a flat 5-pin, wired so the extra pin powers the lock-out solenoid when in reverse. If the factory plug is a round 7-pin, you can buy a 7-into-5 adapter for around $12.
Steve
If the factory plug on that 150 is a flat 4-pin you need to replace it with a flat 5-pin, wired so the extra pin powers the lock-out solenoid when in reverse. If the factory plug is a round 7-pin, you can buy a 7-into-5 adapter for around $12.
Steve
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Elder User
Joined: Oct 2005
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From: Citrus Heights, CA
These are indeed surge brakes. I just couldn't remember what they were called while writing the first post.
If I have a bad connector, it is in the round, six connector, socket. I have an adapter that goes from there to a flat five. The truck came stock with both flat four and round six prong connectors.
Really, I'm just looking to where the power should come from. If it is the backup lights, I'll wire it in from there. If it is from somewhere else, I'd like to know.
Chet
If I have a bad connector, it is in the round, six connector, socket. I have an adapter that goes from there to a flat five. The truck came stock with both flat four and round six prong connectors.
Really, I'm just looking to where the power should come from. If it is the backup lights, I'll wire it in from there. If it is from somewhere else, I'd like to know.
Chet
CO River Rat
Joined: Feb 2004
Posts: 3,209
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From: Lake Havasu City AZ
Chet -
Here's your wiring diagram: http://www.accessconnect.com/trailer_wiring_diagram.htm
If I'm reading it right, the 12v pin is hot with ignition key on; you don't have a breakaway battery to charge, so you could rewire this pin for back-up light power to activate the lock-out solenoid. Just make sure your 6-into-5 adapter works for this set-up. If not, you may have to rewire the electric brake pin for back-up power, but one of these ways should get you juice to the trailer plug's pin for the solenoid.
I doubt that round 6-pin connector is from the factory, especially on an '01, but I could be wrong.
Steve
Here's your wiring diagram: http://www.accessconnect.com/trailer_wiring_diagram.htm
If I'm reading it right, the 12v pin is hot with ignition key on; you don't have a breakaway battery to charge, so you could rewire this pin for back-up light power to activate the lock-out solenoid. Just make sure your 6-into-5 adapter works for this set-up. If not, you may have to rewire the electric brake pin for back-up power, but one of these ways should get you juice to the trailer plug's pin for the solenoid.
I doubt that round 6-pin connector is from the factory, especially on an '01, but I could be wrong.
Steve
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