Back up fuse

[Shane s]

Doesn’t happen every time but in reverse
i blow my back up fuse in my truck. I have
a brand new actuator. But it did it before the
new actuator. The white wire is connected to
the bottom of the actuator. Any ideas thanks.

[21XDC]

Check the blue wire condition from the plug to the selonoid, and all the way back to the back up lights on trailer if you have them. If the wire is exposed and touching the trailer this will happen.

[Shane s]

Thanks I appreciate it. I will check that.

[alli ss]

Last time i seen this it just happened to be on the truck side. I have seen all the stuff that mike mentioned plenty of times and after replacing the lock out solenoid and rewiring the whole trailer my buddy brought his over, i hooked it up to a 4 wire trailer adapter to his truck and it still blew the fuse. It just happened to get shorted while he was plugging it in to the truck which made him suspect the trailer. Probably would blow without a trailer at that point but you can check continuity between your ground and the blue reverse light wire on your trailer with a meter then start unhooking from there til it goes away. Probably a faulty reverse light

[21XDC]

The white wire is connected to
the bottom of the actuator.

The white wire is ground... You don't have that hooked to the solenoid where the blue wire should go do you?

[Shane s]

The white wire is ground... You don't have that hooked to the solenoid where the blue wire should go do you?

I hooked the white wire back up to the bottom of the solenoid where it was hooked up before.

[Shane s]

Last time i seen this it just happened to be on the truck side. I have seen all the stuff that mike mentioned plenty of times and after replacing the lock out solenoid and rewiring the whole trailer my buddy brought his over, i hooked it up to a 4 wire trailer adapter to his truck and it still blew the fuse. It just happened to get shorted while he was plugging it in to the truck which made him suspect the trailer. Probably would blow without a trailer at that point but you can check continuity between your ground and the blue reverse light wire on your trailer with a meter then start unhooking from there til it goes away. Probably a faulty reverse light

So where exactly was the short?

[alli ss]

So where exactly was the short?

It was in the big plug that goes thru the bumper- the female 7 way

[Shane s]

Last time i seen this it just happened to be on the truck side. I have seen all the stuff that mike mentioned plenty of times and after replacing the lock out solenoid and rewiring the whole trailer my buddy brought his over, i hooked it up to a 4 wire trailer adapter to his truck and it still blew the fuse. It just happened to get shorted while he was plugging it in to the truck which made him suspect the trailer. Probably would blow without a trailer at that point but you can check continuity between your ground and the blue reverse light wire on your trailer with a meter then start unhooking from there til it goes away. Probably a faulty reverse light

I have no short to the back on both sides of the trailer. The only short I have is the blue and white wire to the actuator. Is this correct? I’m an electrician. But I wasn’t sure. A light bulb shows continuity.

[alli ss]

I have no short to the back on both sides of the trailer. The only short I have is the blue and white wire to the actuator. Is this correct? I’m an electrician. But I wasn’t sure. A light bulb shows continuity.

That means your reverse lockout solenoid is bad. Its a common thing. If you clip the blue wire going to it try your reverse lights and see if they blow the fuse.

[Shane s]

That means your reverse lockout solenoid is bad. Its a common thing. If you clip the blue wire going to it try your reverse lights and see if they blow the fuse.

Thanks I appreciate it.