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Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV. |
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07-19-2021, 07:58 PM | #1 |
Not Yet Wild
Join Date: Apr 2021
Posts: 25
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Reverse No Forward
Hey guys I just went for a ride & when I first took off, it started to pulsate pretty bad, then straighten out. We rode for a bit & when pulling back in the driveway. I stopped and eased into the throttle. It started to pulsate again, then completely stopped. I can hear the relay engage & the voltage drops, but no go in forward. I do have full function in reverse...
Any help would be greatly appreciated. Its a EZGO J199-1205507 |
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07-20-2021, 10:22 PM | #2 |
Not Yet Wild
Join Date: Apr 2021
Posts: 25
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Re: Reverse No Forward
Both forward & reverse micro switches check good.
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07-21-2021, 07:07 AM | #3 |
Gone Wild
Join Date: Sep 2010
Location: Florida
Posts: 1,895
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Re: Reverse No Forward
"I can hear the relay engage & the voltage drops, but no go in forward."
The question is what does the voltage drop to? does it drop at main pack positive/negative or at the solenoid? Half speed reverse could work even with a bad battery where-as forward may drop out pack...also year of batteries would help out the other as well.. |
07-21-2021, 10:36 AM | #4 | |
Not Yet Wild
Join Date: Apr 2021
Posts: 25
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Re: Reverse No Forward
Quote:
On my lil voltage gauge on the dash, it drops from 36vdc down to 32vdc. |
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07-21-2021, 10:44 AM | #5 |
Gone Wild
Join Date: Sep 2010
Location: Florida
Posts: 1,895
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Re: Reverse No Forward
Trojan has a date code on the negative terminal that will tell you exact age... A8 = January 2018....B8 = February 2018 C9 = March 2019 and so on...5-6 years is the life expectancy on average for a set... 36V on a 36 volt cart is near dead..it should be at around 38.1 volts after a full charge... My next step would be to check each battery individually to see if one is dropping out or whole pack is dropping evenly...But someone else may have another suggestion for ya
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07-21-2021, 02:38 PM | #6 | |
Not Yet Wild
Join Date: Apr 2021
Posts: 25
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Re: Reverse No Forward
Quote:
I checked the code it's G6 (2016) so much much older than I thought.... |
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07-21-2021, 03:39 PM | #7 |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: Reverse No Forward
You didn't identify the drive type, but said both F and R microswitches tested good, so I suspect it is a sepex drive (DCS in a 1999) rather than a series drive.
If it is a DCS and runs in one direction but not the other, either the controller is bad, or the F/R voltage isn't getting to the controller. On the other hand, if it is a series drive and only going in one direction, chances are high that it is a F/R switch issue. |
07-21-2021, 11:11 PM | #8 | |
Not Yet Wild
Join Date: Apr 2021
Posts: 25
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Re: Reverse No Forward
Quote:
What would I do to test the controller is in fact getting the voltage it needs to power forward? And what terminals at the motor should have voltage? I'm trying to figure out what's the power in/power out of the controller when in forward. Thanks |
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07-22-2021, 01:52 AM | #9 | |
Gone Wild
Join Date: Jul 2015
Location: Central South Carolina
Posts: 929
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Re: Reverse No Forward
Quote:
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07-22-2021, 10:32 AM | #10 | |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: Reverse No Forward
Quote:
The voltage between F1 and F2 will likely be about 20V since the field mapping ought to be calling for high field amps when starting and might get down to 5V or less as motor spins faster. F1 will be "-" when one direction is selected and "+" when the other direction is selected. Attached are two drawings of a generic sepex controller using a H-bridge to feed the field windings showing amp flow in F and in R. |
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