Trailer stop lights

Trailer stop lights

Postby Silverfox1111 on Tue, 15 Jun 2021 11:05 +0000

G'day all
Bit of a strange issue but I thought I'd bring it up here before it gets to the auto electrician.
I've got a 2017 hilux with a redarc towpro trailer brake controller. Recently I've noticed that the van brake lights are constantly on. The electric brakes on the van are working properly as I can adjust the braking power via the brake controller.
There is constant 12V on the car end of the trailer plug pin that is for the trailer stop light.
Has anyone had this issue before?
TIA
Silverfox
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Re: Trailer stop lights

Postby Gipsy on Tue, 15 Jun 2021 12:13 +0000

Have you checked the Breakaway emergency pin? This will put the brakes on.
The 12v on the brake light in the plug/ socket appears to be a problem with the brake controller. Is there a light on the controller?
Are the brake lights on the vehicle on?
Cheers Gipsy :D although I'm sure somebody will challenge that :lol: even Einstein wasn't certain of his theories.
My 2013 auto D4D DC SR5, prefilter, 3" exhaust and Chip with egt probe, stock SR5 rims with Toyo Open Country AT2 265/65R/17's
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Re: Trailer stop lights

Postby Silverfox1111 on Tue, 15 Jun 2021 3:13 +0000

G'day gypsy
It doesn't have a breakaway system.
Brake lights on the car are off.
Brake controller works the vans breaks correctly when towing.
Thinking either there's a fault in the redarc controller or its wiring somewhere.
Silverfox
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Location: Dapto. NSW.

Re: Trailer stop lights

Postby dave g on Tue, 15 Jun 2021 4:25 +0000

Hi silverfox
Who installed the unit.
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Re: Trailer stop lights

Postby Gipsy on Tue, 15 Jun 2021 5:22 +0000

Yes it does look like a controller or wiring problem
Cheers Gipsy :D although I'm sure somebody will challenge that :lol: even Einstein wasn't certain of his theories.
My 2013 auto D4D DC SR5, prefilter, 3" exhaust and Chip with egt probe, stock SR5 rims with Toyo Open Country AT2 265/65R/17's
Gipsy
 
Posts: 2135
Joined: Tue, 07 May 2013 2:00 +0000
Location: South Coast NSW and all over Oz

Re: Trailer stop lights

Postby dave g on Tue, 15 Jun 2021 7:47 +0000

Is the brake wired to the out side of the
brake pedal switch make sure it is not on
the cruise control side
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Joined: Fri, 18 Oct 2013 6:59 +0000

Re: Trailer stop lights

Postby Silverfox1111 on Thu, 17 Jun 2021 3:10 +0000

G'day all
I've just fixed this issue.
Gipsy, you were very close with the fix. There are two relays in the toyota towing wiring loom, situated near the spare tyre. One of these was full of water & corroded in the "closed" position. A quick trip to supercheap for a new one & it's all good now.
Only problem I had with the fix was having my face directly under the relay & it's housing when I opened it up & getting a face full of rusty water!!
Thanks all for your help.
Silverfox
Silverfox1111
 
Posts: 146
Joined: Sun, 28 May 2017 6:44 +0000
Location: Dapto. NSW.

Re: Trailer stop lights

Postby Gipsy on Fri, 18 Jun 2021 6:58 +0000

Ouch, lesson learned, don't get under the spot you're working on. ;)
Glad you found the problem, many others could be faced with this. I did do some syllogistic reasoning and all I could come up with was the wiring loom. ;)
Did you work out why it was full of water? Taken the Hilux for a swim lately? :o
Cheers Gipsy :D although I'm sure somebody will challenge that :lol: even Einstein wasn't certain of his theories.
My 2013 auto D4D DC SR5, prefilter, 3" exhaust and Chip with egt probe, stock SR5 rims with Toyo Open Country AT2 265/65R/17's
Gipsy
 
Posts: 2135
Joined: Tue, 07 May 2013 2:00 +0000
Location: South Coast NSW and all over Oz

Re: Trailer stop lights

Postby Silverfox1111 on Sat, 19 Jun 2021 7:00 +0000

Did a pretty deep water crossing near Nelligen about 6 months ago, ironically on the way to shallow crossing.
Tossing up on wether to drill a small drain hole in the protective cover. At least the water can then get out.
Silverfox
Silverfox1111
 
Posts: 146
Joined: Sun, 28 May 2017 6:44 +0000
Location: Dapto. NSW.

Re: Trailer stop lights

Postby Gipsy on Sat, 19 Jun 2021 7:24 +0000

Good idea ;) nice country up there around nelligen, I spent time rallying in that area throughout the 70s.
Cheers Gipsy :D although I'm sure somebody will challenge that :lol: even Einstein wasn't certain of his theories.
My 2013 auto D4D DC SR5, prefilter, 3" exhaust and Chip with egt probe, stock SR5 rims with Toyo Open Country AT2 265/65R/17's
Gipsy
 
Posts: 2135
Joined: Tue, 07 May 2013 2:00 +0000
Location: South Coast NSW and all over Oz


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