Author Topic: Blown trailer brake fuse  (Read 467 times)

Offline travelpro

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Blown trailer brake fuse
« on: August 02, 2018, 08:13:13 AM »
Any idea what would be causing my 15 amp trailer brakes blade fuse to keep blowing? I have a Tekonsha trailer brake system.
Toyota Landcruiser GXL 76 series, 2012 Murranji MKIII

Offline MarkA

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Re: Blown trailer brake fuse
« Reply #1 on: August 02, 2018, 08:48:08 AM »
Check the wiring to the plug on you’re car and make sure there corrosion free and not shorting anywhere also Wiring to the magnets inside the drums can short if they rub or there worn. Remove the drums and inspect or check for a dead short on the van.
Others may have better ideas, 
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Offline Shaker

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Re: Blown trailer brake fuse
« Reply #2 on: August 02, 2018, 09:55:00 AM »
I didn’t think fuses were meant to be used with brake controllers & that circuit breakers were usually fitted.
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Offline peter_mcc

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Re: Blown trailer brake fuse
« Reply #3 on: August 02, 2018, 10:46:24 AM »
I think you're meant to have a self-resetting circuit breaker rather than a fuse (or manual reset circuit breaker).

Try measuring the resistance of the trailer brakes when it's disconnected from the car - perhaps there is a short.

I find the wires on the magnets break off regularly (experience from high mileage hire Tvan's) - perhaps one has broken and is shorting out on the brake internals. [yes, I use proper Alko off-road magnets - I've got a collection of magnets with wires that have broken off at the edge of the magnet well before the magnet had worn down. I think Alko's magnet is a crappy design and the wire needs more support as it exits the magnet because I suspect the wire inside bounces around over corrugations causing it to break where it is fixed going into the magnet]

Offline Smallfry

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Re: Blown trailer brake fuse
« Reply #4 on: August 02, 2018, 12:58:13 PM »
I'm not a fan either, have always had disc brakes on boat trailers. Has anyone considered swapping from drum to disc or is it too much hassle
Rob

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Offline peter_mcc

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Re: Blown trailer brake fuse
« Reply #5 on: August 02, 2018, 02:30:26 PM »
I'm not a fan either, have always had disc brakes on boat trailers. Has anyone considered swapping from drum to disc or is it too much hassle

I looked at it - it's not cheap. A lot more than replacing the magnets every year (or less)! From what I found, you have to get the disc brake caliper mounts welded to the axle stub. You need the disc calipers, new hubs and a hydraulic pump. It's doable just not cheaply. I guess that's why TT stick with drums...

Offline Shaker

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Re: Blown trailer brake fuse
« Reply #6 on: August 02, 2018, 04:00:18 PM »
Track stick with drums because like idiots we let them by keeping buying their campers, none of us would buy a new vehicle with drum brakes!
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Offline Cruiser 105Tvan

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Re: Blown trailer brake fuse
« Reply #7 on: August 02, 2018, 06:58:37 PM »
There was a thread about changing to disc brakes.

http://www.tracktrailerforums.com/index.php?topic=3131.msg26985#msg26985
a thread from an owner of one for sale in the past.
Previously owned by Cracka.

Described here:
http://www.tracktrailerforums.com/index.php?topic=875.15
http://www.tracktrailerforums.com/index.php?topic=1667.msg12949#msg12949

May even be from the old Yahoo Forum prior to 2013.
http://www.tracktrailerforums.com/index.php?topic=884.msg6010#msg6010 -- Found by Aidan MYT150 who's lots better at finding stuff than me, on this Forum.

Regarding the resetting circuit Breakers.
How would you know there was something wrong if it kept resetting?
« Last Edit: August 03, 2018, 12:27:22 AM by Cruiser 105Tvan »
Robert.
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