Precedent Stuttering No Go

[Boltfan1]

I was driving my 2010 Precedent today parked it for a few minutes and went to drive again and the cart would not move just stuttered a little bit. Batteries are strong 2 year old Trojans and the pack and individual batteries check out over 51 volts. I doubled checked all connections and found nothing loose, I have an Alltrax XCT400 with Heavy Duty 400 amp Solenoid with stock motor installed for over a year now without any issues. I checked the Alltrax toolkit and it showed low battery. I'm thinking solenoid issue but I don't know where to start.

[mrgolf]

The high power controller has burned the brushes in the motor up. WAG

[Boltfan1]

Anyone have some idea how to test the motor?

[Boltfan1]

Update, after load testing batteries tonight with the cart lifted up on jack stands it started to run again. I assume something in the Solenoid was stuck and freed up. It is running normal again. I will install a new Solenoid unless someone has any other ideas why it would start running again.

[CCNorth]

Originally Posted by Boltfan1

Update, after load testing batteries tonight with the cart lifted up on jack stands it started to run again. I assume something in the Solenoid was stuck and freed up. It is running normal again. I will install a new Solenoid unless someone has any other ideas why it would start running again.

Glad it's running again. Are you still seeing the "low battery" error on the controller?
I'd be a little surprised if that HD solenoid is dying after only one year unless it's a cheap, knock-off one and I'm guessing it's not. I wouldn't be too quick to replace it until you see how the cart performs now that it's running again.
Keep us posted. If you continue to have this problem I'm sure the experts here will be happy to help you.

[Gregt909]

Originally Posted by Boltfan1

Update, after load testing batteries tonight with the cart lifted up on jack stands it started to run again. I assume something in the Solenoid was stuck and freed up. It is running normal again. I will install a new Solenoid unless someone has any other ideas why it would start running again.

I had the same symptoms you’re describing and it turned to be a bad 400 amp solenoid that was only about a year old.

[Boltfan1]

Originally Posted by CCNorth

Glad it's running again. Are you still seeing the "low battery" error on the controller?
I'd be a little surprised if that HD solenoid is dying after only one year unless it's a cheap, knock-off one and I'm guessing it's not. I wouldn't be too quick to replace it until you see how the cart performs now that it's running again.
Keep us posted. If you continue to have this problem I'm sure the experts here will be happy to help you.

It is a HD 400 amp Solenoid that I bought from Scotty B. I'm thinking somehow it was locked up or frozen then broke free when testing the load on the batteries. When it got going again there were no more low battery warnings or any red flags on the controller.

[Sergio]

The "low battery" warning from the Alltrax Controller is inconclusive since it is measured after the Solenoid.

You need to also look at a voltage meter directly attached to the batteries in order to detect if the issue is weak batteries, bad connections or solenoid.

Most likely it is a Solenoid issue as that is the typical symptom when those "dual coil" solenoids get the bottom contact stuck on the "holding" coil so they cannot activate again after being turned off.

I mounted my MJZ-400 horizontally as it is recommended in some of those Chinese specifications for that type of Solenoid.

[Boltfan1]

Originally Posted by Sergio

The "low battery" warning from the Alltrax Controller is inconclusive since it is measured after the Solenoid.

You need to also look at a voltage meter directly attached to the batteries in order to detect if the issue is weak batteries, bad connections or solenoid.

Most likely it is a Solenoid issue as that is the typical symptom when those "dual coil" solenoids get the bottom contact stuck on the "holding" coil so they cannot activate again after being turned off.

I mounted my MJZ-400 horizontally as it is recommended in some of those Chinese specifications for that type of Solenoid.

Thanks Sergio, I will look at mounting the new one horizontally.