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harper223's avatar
harper223
Explorer
Aug 23, 2013

Problems installing a brake controller... Weird...

TV : 2013 Armada SL with tow package.


I took the Hensley True Control Gold brake controller from the old Tundra and using the Nissan's harness, hooked everything up, double checked with Hensley and Nissan to make sure the right wires were matched.

Problem : The controller only displays information when the brake pedal is applied. When I release the brake, screen goes black again. So I can't control gain or monitor any voltage, you know, basically use the controller. I checked all the fuses and they are good. Is this a relay problem? There is no constant power coming from the Nissan wiring harness RED wire.

Any ideas?
  • Nothing.


    All I found was this:
    FOR NISSAN JUMPER HARNESS :
    Red/green = vehicle stop lamp switch to trailer brake controller
    Black=brake controller ground
    Brown/white=trailer brake controller switched output
    Red/blue =illumination
    Red=fused trailer brake controller battery feed (B+)
  • Look in the owner's manual under the fuses area to see if it lists the correct fuse location for the controller plug.
  • I know that the controller works the way it used to because I hooked it straight to the battery using a long wire connecting the Hensley True Control power wire and bypassing the Nissan's harness. I was able to use all of its normal functions
  • All fuses tested good. Checked the wire connections again to be sure. I'm totally confused.
  • Wrong fuse. The brake controller should be around a 10 amp. The 30 amp is for the charge line.
  • There's a 30A trailer tow fuse or relay, I'm having trouble getting to it so I'm not sure if it's a fuse or relay.