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Tundra Issue w/ trailer brake surge and back up lights #13267053 09/01/19 07:19 PM
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Yankinlips Offline OP
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Truck: 2014 Tundra
Trailer: Skeeter/Ezloader
Issue(s):
1 - I've had to disengage the surge breaks on the trailer due to being unable to back up at times. I use that little magnet attachment to keep the pin from sliding back n forth. The breaks would engage and keep me from doing so.
2 - I have back up lights on my trailer that won't work. They do work with other trucks hooked up, just not mine.

Is this a fuse issue, wiring issue?

Re: Tundra Issue w/ trailer brake surge and back up lights [Re: Yankinlips] #13267091 09/01/19 07:58 PM
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bronco71 Online Content
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Does the truck have the flat 5 pin plug? If so could be fuse or the reverse lights are not wired into the truck plug.


1987 Nitro MX185/Mercury Black Max 150
1999 Triton TX21/225 Mercury Optimax
Re: Tundra Issue w/ trailer brake surge and back up lights [Re: Yankinlips] #13267092 09/01/19 08:01 PM
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Yankinlips Offline OP
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I've checked the fuze box and come up empty. Checking to see if how the truck plug has been wired.

Re: Tundra Issue w/ trailer brake surge and back up lights [Re: Yankinlips] #13267094 09/01/19 08:05 PM
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bronco71 Online Content
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Should get 12v on the end female plug with the truck reverse lights on....

Last edited by bronco71; 09/01/19 08:07 PM.

1987 Nitro MX185/Mercury Black Max 150
1999 Triton TX21/225 Mercury Optimax
Re: Tundra Issue w/ trailer brake surge and back up lights [Re: Yankinlips] #13267205 09/01/19 10:17 PM
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From what you are describing you have may a fuse out on the truck. The tundra has one fuse for reverse lights and another for trailer back up. I’ve seen trucks where guys swear the fuses are good because the reverse lights work. But the back up fuse is blown. The bk/up fuse is in the cab. This shows it to be fuse 22 in the cab. Top diagram is under hood box and further down is in cab fuse box

22 is tow back up and 26 is reverse lights

https://imgvehicle.com/toyota/tundra-ii/fuse-box

Last edited by K.D.; 09/01/19 10:26 PM.
Re: Tundra Issue w/ trailer brake surge and back up lights [Re: Yankinlips] #13268957 09/03/19 05:24 PM
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Stump jumper Online Content
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You can engage your emergency brakes and turn the key to on without starting the truck. Put the shifter in reverse and test the center pin on the trailer hook up at the truck for power. Just verify that you have a good ground.


2200 Bay Champ/200 Mercury Optimax
2017 Tundra TSS 4x4 Crewmax 5.7L
Re: Tundra Issue w/ trailer brake surge and back up lights [Re: Yankinlips] #13269005 09/03/19 05:55 PM
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redchevy Offline
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I don't think it is something wrong with the truck, I think it is just how it is set up.

Our '04-'06 GM trucks have functioning trailer lighting from the factory and haven't been messed with. They will not work on our boat with surge brakes though. All our other trucks work on them fine.

That is just my experience, those trucks were all factory wired and work with every other trailer that we have that has no brakes or electric brakes, but they will not activate the solenoid to disengage the surge brakes when you back up.

Re: Tundra Issue w/ trailer brake surge and back up lights [Re: Yankinlips] #13269531 09/04/19 01:18 AM
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bronco71 Online Content
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If the trailer works fine behind other trucks I am sure the problem is with the truck! Either the reverse light wire is not wired to the plug on the truck side or a fuse is blown! As stated before several times check the truck plug, I am sure there is not 12v on the reverse pin when the reverse lights are on....... all those other trailers probably did not have reverse lights or surge brakes with a reverse lockout solenoid so the reverse light wiring was not needed on the truck side. Not uncommon for the factory not to wire reverse lights to the truck plug.

Last edited by bronco71; 09/04/19 01:21 AM.

1987 Nitro MX185/Mercury Black Max 150
1999 Triton TX21/225 Mercury Optimax
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