Elec Trailer Brake Control - Internal / External

Submitted: Friday, Mar 30, 2007 at 11:30
ThreadID: 43802 Views:2635 Replies:3 FollowUps:1
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I want to have both trailer-mounted and vehicle-mounted options for electric trailer brake control.
My horse float came with trailer-mounted electric brake controller. I already have a vehicle-mounted controller which I would use in preference but I want to be able to lend the float to someone who doesn't have a vehicle-mounted controller.
I tried connecting the 2 controllers in series but they won't work that way - don't know why not. I can only think that the two control circuits must be incompatible.

The only other option I can think of is to bypass the trailer-mounted controller when the vehicle-mounted controller is in use. I'd rather not use a switch for this because that could be a bit risky if it is accidently bumped. I was thinking of doing it by wiring up 2 different plugs. One, 6-Pin Small, would be for trailer-mounted control, the other, 7-Pin Large, would be for vehicle-mounted control. But this could get pretty messy and will also require a special 6-Pin Small cross-over connector to connect vehicle-Stop to both trailer-Stop and trailer-Brakes when the trailer-mounted system is used.
There may also be a relay-based solution but that's a bit too technical for what needs to be simple.
Anyone else solved this problem or have some ideas?
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Reply By: Mikee5 (QLD) - Friday, Mar 30, 2007 at 12:51

Friday, Mar 30, 2007 at 12:51
If they are getting free use of a horse float, surely a $160 investment in their own controller is a bargain???
AnswerID: 230628

Follow Up By: Member - Bucky (VIC) - Saturday, Mar 31, 2007 at 04:44

Saturday, Mar 31, 2007 at 04:44
Go Mike ,,,
I would not lend them the float till they had a controller in it ,,,

Think about it

FollowupID: 491624

Reply By: Rosco - Qld - Friday, Mar 30, 2007 at 13:00

Friday, Mar 30, 2007 at 13:00
How about running the wiring through a key activated switch. Turn the key to activate the trailer mounted controller and remove from lock ???

AnswerID: 230630

Reply By: Member - Franga (QLD) - Saturday, Mar 31, 2007 at 07:08

Saturday, Mar 31, 2007 at 07:08
Gordon the two controller scenario can be done, I have an internal one and the other day I hire a trailer from flexihire that had an external one and it worked.
Hope this helps.

Regards Franga
AnswerID: 230793

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