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07-27-2019, 11:55 PM | #1 |
Not Yet Wild
Join Date: Nov 2018
Posts: 22
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Solenoid not clicking,cart slowly shutters forward
Hello everyone. We've got a CCP with Alltrax controller and MZJ-400 amp solenoid. Have driven it a bunch since the upgrade without issue. Last drive was 4th of July, drove great, parked it and plugged it in. Went to go drive it the other day and the cart barely creeps/shutters forward. I noticed that I'm not getting the 'click' of the solenoid closing. I checked voltages, battery pack, and connections.
Can I jump the solenoid with 12v or does it need 48v 'engage'? Any other way to bench test it before replacing it? What would cause it to go bad after only a few months? |
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07-28-2019, 12:03 AM | #2 |
Gone Insane
Join Date: Oct 2016
Location: Richmond, VA
Posts: 14,215
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Re: Solenoid not clicking,cart slowly shutters forward
Does that solenoid have a resistor across the 2 big posts? If so does it get hot when the cart tries to move?
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07-28-2019, 12:25 AM | #3 |
Not Yet Wild
Join Date: Nov 2018
Posts: 22
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Re: Solenoid not clicking,cart slowly shutters forward
Picture
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07-28-2019, 12:25 AM | #4 |
Not Yet Wild
Join Date: Nov 2018
Posts: 22
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Re: Solenoid not clicking,cart slowly shutters forward
It does but I can't tell if it gets hot because I can't get to it when it's all back together. There is also a resistor or something like it between the two smaller connections
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07-28-2019, 12:40 AM | #5 |
Gone Insane
Join Date: Oct 2016
Location: Richmond, VA
Posts: 14,215
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Re: Solenoid not clicking,cart slowly shutters forward
The one on the small posts is a diode. I don't know anything about Alltrax controllers, but if it was mine this is what I would do: Jack the rear wheels off the ground. Tap the side of the solenoid with a rubber mallet, short piece of 2x2 wood or something similar while the pedal is slightly depressed. I think you may have a solenoid that is stuck open.
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07-28-2019, 06:53 AM | #6 |
MOD of all BS!
Join Date: Sep 2011
Location: Florida
Posts: 17,477
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Re: Solenoid not clicking,cart slowly shutters forward
If you read the blink codes when you are depressing the pedal, you are more than likely getting a "Pre-Charge Failure" and you will also see that in the Alltrax Tool Kit. I do not know what is up with the MZJ's lately, but I have had 2 do that within as many months.
As MC stated, get a wooden hammer handle and tap very sternly on the side as the bridge is failing to properly close in and deliver current across the large posts. I have this 2nd one on the bench and will be dissecting it for a Root Cause analysis as soon as things slow down..... |
07-28-2019, 10:37 AM | #7 |
Not Yet Wild
Join Date: Nov 2018
Posts: 22
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Re: Solenoid not clicking,cart slowly shutters forward
Thank you gentlemen, I will give that a try and follow up here after in case someone else runs into the same issue.
Is this solenoid going to be prone to doing this now? I hate to be away from the house with the family and have a failure or to have to take everything apart every couple months. Would I be better off in just replacing it? |
07-28-2019, 10:46 AM | #8 |
Not Yet Wild
Join Date: Nov 2018
Posts: 22
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Re: Solenoid not clicking,cart slowly shutters forward
Follow up questoin, can I manually engage the solenoid to see if it's fixed with 12v on the work bench or does it need to be 48v?
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07-28-2019, 11:25 AM | #9 |
MOD of all BS!
Join Date: Sep 2011
Location: Florida
Posts: 17,477
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Re: Solenoid not clicking,cart slowly shutters forward
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07-28-2019, 11:29 AM | #10 | |
MOD of all BS!
Join Date: Sep 2011
Location: Florida
Posts: 17,477
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Re: Solenoid not clicking,cart slowly shutters forward
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