Cart will not go

William Thompson IV · 11-16-2018, 05:33 PM

1997 48v ds hunting biggie package from Carts Unlimited. This has now happened twice in 2-3 months. First time it happened was about 2 weeks after install of upgrades. I’ll be driving, let off the accelerator and than get no engagement of the solenoid. First time I was testing the solenoid getting power to all the right places. Repeated test multiple times and then all of a sudden the wheels started spinning while testing solenoid and accelerator. I went a head and put on a new potentiometer just in case. Carts been working great for 3 months and then today, driving, foot off the accelerator to take a turn and then nothing, solenoid has no engagement. Any thoughts?

scottyb · 11-16-2018, 05:47 PM

Something intermittent in the solenoid activation circuit. You can only find a problem like this when the cart will not go. Carry a meter and see where the power is stopping; like F&R micro switch? V glide micro switch? keyswitch?

William Thompson IV · 11-17-2018, 03:56 PM

Thank you for the advise. Went to check the cart with a meter and cart is working fine. I did nothing but put the cart on the charger overnight. FR switches seemed good. 17amps on them. Kinda perplexing

scottyb · 11-17-2018, 04:26 PM

Quote:

Originally Posted by William Thompson IV

Thank you for the advise. Went to check the cart with a meter and cart is working fine. I did nothing but put the cart on the charger overnight. FR switches seemed good. 17amps on them. Kinda perplexing

Yes, the intermittent problems are the hardest to find. Had one like this, I drove it around the building for an hour before it failed and only then I was able to find the switch which was not working. (before it started working again!) I changed that switch and the customer had no more complaints.

William Thompson IV · 01-15-2019, 09:21 PM

So it happened again. But now it’s still not going at all. I went ahead and changed the key switch, all micro switches on the HD F&R, switched over to a MCOR4 from the factory potentiometer. Still not working Grrrr!! I figure maybe the solenoid?? When I press the accelerator the solenoid makes a humming soundkinda high on the pitch but low on the volume, if that makes sense.

NoleFan4Ever · 01-15-2019, 09:31 PM

If you have the 48v permissives present and it is not activating (but it is humming), then the bridge in the solenoid is probably sticking (or coil is bad). Take the butt of a wooden hammer and tap firmly on the side of it. If you have the 48v + & - present, then it is definitely a solenoid issue (activation coil, bridge assembly, etc.)

William Thompson IV · 01-15-2019, 11:57 PM

Thanks for the advise. I went ahead and purchased a new solenoid, resistor and diode. I’ll post the results after the install.

William Thompson IV · 01-19-2019, 12:14 AM

Yup. It was the solenoid. New one on and back in business.

NoleFan4Ever · 01-19-2019, 08:09 AM

That is great!!

11-16-2018, 05:33 PM	#1
William Thompson IV Not Yet Wild Join Date: Oct 2018 Posts: 6	Cart will not go 1997 48v ds hunting biggie package from Carts Unlimited. This has now happened twice in 2-3 months. First time it happened was about 2 weeks after install of upgrades. I’ll be driving, let off the accelerator and than get no engagement of the solenoid. First time I was testing the solenoid getting power to all the right places. Repeated test multiple times and then all of a sudden the wheels started spinning while testing solenoid and accelerator. I went a head and put on a new potentiometer just in case. Carts been working great for 3 months and then today, driving, foot off the accelerator to take a turn and then nothing, solenoid has no engagement. Any thoughts?

11-16-2018, 05:47 PM	#2
scottyb Happy Carting Join Date: Dec 2007 Location: Southern California Posts: 73,418	Re: Cart will not go Something intermittent in the solenoid activation circuit. You can only find a problem like this when the cart will not go. Carry a meter and see where the power is stopping; like F&R micro switch? V glide micro switch? keyswitch?

11-17-2018, 03:56 PM	#3
William Thompson IV Not Yet Wild Join Date: Oct 2018 Posts: 6	Re: Cart will not go Thank you for the advise. Went to check the cart with a meter and cart is working fine. I did nothing but put the cart on the charger overnight. FR switches seemed good. 17amps on them. Kinda perplexing

01-15-2019, 09:21 PM	#5
William Thompson IV Not Yet Wild Join Date: Oct 2018 Posts: 6	Re: Cart will not go So it happened again. But now it’s still not going at all. I went ahead and changed the key switch, all micro switches on the HD F&R, switched over to a MCOR4 from the factory potentiometer. Still not working Grrrr!! I figure maybe the solenoid?? When I press the accelerator the solenoid makes a humming soundkinda high on the pitch but low on the volume, if that makes sense.

01-15-2019, 09:31 PM	#6
NoleFan4Ever MOD of all BS! Join Date: Sep 2011 Location: Florida Posts: 17,477	Re: Cart will not go If you have the 48v permissives present and it is not activating (but it is humming), then the bridge in the solenoid is probably sticking (or coil is bad). Take the butt of a wooden hammer and tap firmly on the side of it. If you have the 48v + & - present, then it is definitely a solenoid issue (activation coil, bridge assembly, etc.)

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01-15-2019, 11:57 PM	#7
William Thompson IV Not Yet Wild Join Date: Oct 2018 Posts: 6	Re: Cart will not go Thanks for the advise. I went ahead and purchased a new solenoid, resistor and diode. I’ll post the results after the install.

01-19-2019, 12:14 AM	#8
William Thompson IV Not Yet Wild Join Date: Oct 2018 Posts: 6	Re: Cart will not go Yup. It was the solenoid. New one on and back in business.

01-19-2019, 08:09 AM	#9
NoleFan4Ever MOD of all BS! Join Date: Sep 2011 Location: Florida Posts: 17,477	Re: Cart will not go That is great!!