Hopkins brake control

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80srockandrum

Member
Joined
Mar 17, 2019
Posts
14
I recently had a Hopkins brake control installed in my 92 Ford F150. All lights work, but brakes do not activate. I also don't get the indicator on the control itself saying it is connected. Any ideas?
 

donn

Well-known member
Joined
Nov 8, 2009
Posts
5,372
Do you have a 7 pin or a 4 pin connector on the back of the truck?
 

Gary RV_Wizard

Site Team
Joined
Feb 2, 2005
Posts
76,153
Location
West Palm Beach, FL
Either the trailer or the brake controller isn't wired right. Could be as simple as a missing ground wire on the trailer side.

You can use a trailer plug tester to verify the truck side is ok, but there are a couple variants depending on gthe plug in use.

https://www.amazon.com/58270-7-Way-Blade-Connector-Tester/dp/B001EOWQY4/

A visual inspection of the trailer side and a VOM to test for ground and brake circuit continuity should find most trailer side problems.
 

80srockandrum

Member
Joined
Mar 17, 2019
Posts
14
It is a 7 blade. I looked at the wires coming into the plug on the truck, I noticed that there is 1 that is not hooked up to the plug, white wire. Could this be the problem?
 

SpencerPJ

Well-known member
Joined
Nov 1, 2017
Posts
4,032
Location
Midwest
I just looked at the Hopkins wiring, and the white wire is Ground.  This absolutely can and is your problem.

Please verify that this is your set-up
https://www.ajtnt.com/7-way-rv-plug-diagram/

 
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