I have a trolling motor problem

Last year I had a 24 volt 70 lb. Minnkota PD with auto pilot & us1 and it worked great. Because I planned to upgrade the depthfinder up front I sold it and got a refurbished motor from Fish Lectronics only its a V2 with us2. Because of knee issues I wasn’t able to get out until last Saturday. Well it didn’t go so well.The motor would run for 30 seconds and shut off. I had to unplug the unit and plug it back in to get it to work again for another 30 seconds. I did this about 5 times and called it quits and went back home. These are the same batteries and connections as last year. The batteries were fully charged as I let the onboard charger run all night. I checked the battery guage on the motor and it showed full charge. Put a volt meter in the plug in and it read 24.9 volts. Called Fish Lectronics and got it in. They ran it for 1/2 an hour at full speed without any problems. Tonight I disconnected the jumper on the batteries and had a friend do a load test on each of trolling motor batteries and they were fine. Reconnected the jumper and rechecked the plug in and it was at 24.9 v. With the volt meter plugged into the motor plugin we jiggled the wires to see if there was a loose connection and they are fine. I am stumped and upset. I’m going to Canada next Friday and am supposed to take my boat, but I’ve got to figure this out first. The only thing I can think of is maybe with the us2 plugged in, could that be causing it? I’m going to call FE in the morning and ask them if they hooked up a sonar unit to it when the ran it. That is the only thing I can think of that might be different from when I ran it.
Any help or suggestions would be greatly appreciated.

With the upcoming trip, I would drag the whole rig over for them to look at…. MAJOR bummer for sure…

big G

The plug on T-motor is wired wrong ,its not the same as the boat thats all it could be !!!!!

Yep. Make sure the plug is connected to the 24v system.
Otherwise, your outta luck.

As James can attest to, I had the same thing happen a couple years back and it was due to a faulty circuit breaker at the battery. It would heat up and trip…and reset when cooled. Trip and re-set. Trip and Re-set! Fixed that and it was fine. Worth a look. It is a push button looking breaker.

It sounds to me that you are tripping a fuse. I would make sure that it is not loose or touching something.

I will check out the circuit breaker and the wiring again, but the wires at the plug showed 24.9 volts. If the black & red wires got switched when I put the plug on the new motor could this cause it or would the motor try to run backwards?
It would reverse the polarity to the motor, right?

Make sure the breaker at the batt is rated correctly. As mentioned, if it is too little amps it will pop and reset, pop and reset. I had the same problem with my Terrova, it needed a 60 amp, I had a 40.

Auto reset breakers will also go bad. Replace the breaker and see if it still does it.

I had a similar problem with my Minkota Max Pro 80 with U2,I first replaced the auto breakers with manual breakers but still had the problem, next I rewired the plug and this took care of it. when I removed the tape one black connection was loose and one red wasn’t letting the juice through even though it was still in the connector. Good luck

Well,
I got my motor back from Fish Lectronics Friday. He said there is nothing wrong with the motor. I asked him if it would hurt it to run it out of the water before I left. I reinstalled it on my boat. I ran it on the fastest speed for 20 minutes in the garage and it never failed.
Took it out on the water this afternoon (Sunday) and it failed again after 30 seconds under a heavy load (full speed). Figured out if I run it no more than 4-5 on the footpedal it doesn’t kick out at all. That would never work in a strong wind.
So I got back off the water, called a friend of mine with a 24 volt system on his boat. Put my motor on his boat, went back on the water and my motor failed in his boat too. Exactly like on my boat.
This tells me it is not the wiring on my boat, but the motor that is the problem. Now I have to call FE and run back up there again tomorrow and convince him that there really is something wrong with it.
What a mess.