Power Jack - no power

[LeahBerry]

I have 2014 Sunset Trail trailer and I've installed a new power A frame jack. The power worked for the first 4 times i used it and now it doesn't.

I've checked fuses and power inside the trailer, they all seem to be fine. I am unsure if there is a fuse/breaker located before the junction box on the tongue? Can anyone guide me as to where i might look for a break in power.

Thank you

[007matman]

I would start with a voltage meter. Do you have one? It's odd that it worked the first 4 times. Are your batteries fully charged?

[LeahBerry]

Haven't hooked up batteries. Running off of 110 V plug. Yes, I've tried to source power at the jack itself with no luck. That's what lead me to believe there must be a fuse/breaker that feeds power to the tongue.

[Russb]

Usually the jack is connected directly to the battery and a fuse is in jack wiring from the battery. The fuse is in the wiring that comes with the jack from the mfg. If the battery is not installed that may be the reason it is not working if it was wired directly to the battery.

[007matman]

I'd agree with @Russb. The jack is typically wired directly to the battery. I have no idea why it worked the 4 times before unless for some reason it had power through another source.

I'd have to look at my wiring to figure it out. What I know is that you need batteries. It's not safe to tow without them.

[DavisK]

Originally Posted by 007matman

What I know is that you need batteries. It's not safe to tow without them.

Most states require you to have a working battery installed in a trailer while it is being towed. The battery is what powers the brakes if the trailer becomes detached. Without a battery, the brakes will not work.

[007matman]

Originally Posted by DavisK

Most states require you to have a working battery installed in a trailer while it is being towed. The battery is what powers the brakes if the trailer becomes detached. Without a battery, the brakes will not work.

Agreed.

[Duke4857]

On our 2016 Jayco. When you run the jack too high the fuse will blow. The fuse is in a box under the trailer on the driver's side. I would look for something like that.