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Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV. |
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08-20-2016, 11:00 AM | #21 |
Getting Wild
Join Date: Aug 2016
Location: Seneca South Carolina
Posts: 138
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Re: 36v EZGO Electric PDS F/R issues
forgot to add the battery pack is tapped for the lights
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08-20-2016, 12:09 PM | #22 |
Getting Wild
Join Date: Aug 2016
Location: Seneca South Carolina
Posts: 138
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Re: 36v EZGO Electric PDS F/R issues
I'm getting 38v to both side on the solenoid just no clicks
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08-20-2016, 12:36 PM | #23 | |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: 36v EZGO Electric PDS F/R issues
Quote:
Connect your DVM's Negative test lead to the cart's frame and touch the Positive test lead to any of the battery tops or terminals and you will most likely read a voltage. This is due to the input impedance of the DVM being relatively high compared to the impedance of the insulation on the cables and wires and the insulation of the batteries themselves. This phenomenon has often sent technicians and engineers on wild goose chases, but is fairly easy to eliminate by placing a 10kΩ (or less) resistor between the DVM's test leads. If it is a phantom voltage, it will go away when loaded down with 10kΩ or less, but if it continues to exist, it is a real voltage and the source must be found. I first ran into the troubleshooting nightmares caused by phantom voltages when I switched from an analog VOM (20kΩ/volt input impedance - Simpson 260) to a FET input VOM (10MΩ imput impedance - Triplett 310-FET). ------------- What is the backup light wired into? If it is tapped into the Orange wire going to Pin-2 from the F/R switch, that may be the reason the cart goes into reverse when Pin-6 is disconnected. ------------- The cart appears to have multiple electrical problems, so I'd disconnect every wire from the battery pack not directly used to feed the controller and motor. Then troubleshoot the drive system only. |
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08-20-2016, 12:40 PM | #24 | |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: 36v EZGO Electric PDS F/R issues
Quote:
That is a normal condition when the controls are set for driving the cart, but the pedal has not been pushed. (Pedal switch tells the controller to connect the blue wire to B-) |
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08-20-2016, 12:40 PM | #25 |
Happy Carting
Join Date: Dec 2007
Location: Southern California
Posts: 73,358
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Re: 36v EZGO Electric PDS F/R issues
This phenomenon has often sent technicians and engineers on wild goose chases, but is fairly easy to eliminate by placing a 10kΩ (or less) resistor between the DVM's test leads. If it is a phantom voltage, it will go away when loaded down with 10kΩ or less, but if it continues to exist, it is a real voltage and the source must be found.
Thank you Johnnie B |
08-20-2016, 01:10 PM | #26 |
Getting Wild
Join Date: Aug 2016
Location: Seneca South Carolina
Posts: 138
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Re: 36v EZGO Electric PDS F/R issues
Sorry for the million questions I used to consider my self a pretty good mechanic :). Everything not factory wiring has been removed. As far as the solenoid I only get the volts when the cart is in reverse nothing reads in forward and nothing changes when the petal is pressed.
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08-20-2016, 01:35 PM | #27 | |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: 36v EZGO Electric PDS F/R issues
Quote:
To attend the BMET school, you had to have aptitudes at the 90 percentile level in electronic and 85 percentile level in mechanics, so my students were very bright young men and women, but not many of them figured out what was happening on their own, I suspect not many cart owners are aware of it. |
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08-20-2016, 02:00 PM | #28 | |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: 36v EZGO Electric PDS F/R issues
Quote:
A PDS is more or less a fly-by-wire system and getting the solenoid to click is a two step process. First you have to get the controller to apply B+ on the yellow wire and then apply B- to the blue wire. To get B+ on the yellow wire, the charger has to be unplugged from the cart, Run/Tow in Run, Keyswitch ON, and either F or R selected on the F/R switch. At that point (pedal not pressed) you should have B+ (Full battery pack voltage, 38.2V if fully charged) on the following jacks and pins. J1 Pins 1, 3 (or Pin-2 if in Reverse), 4, 5, 6, 7 (coil feed-thru), 8, 9 and maybe 10 (Beeper feed-thru) (J1 Pin 2 should be about 0V if F/R is in F or Pin-3 should be about 0V if F/R is in R.) J3 Pins 1, 2, 3 & 4 J4 Pin-2 (Pin-1 should be zero volts and Pin 3 & 4 are the ITS voltage) When you press the pedal, J4 Pin-1 should have B+ on it and J1 Pin-7 should drop to 0V (B-) and solenoid should click. |
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08-20-2016, 02:14 PM | #29 |
Getting Wild
Join Date: Aug 2016
Location: Seneca South Carolina
Posts: 138
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Re: 36v EZGO Electric PDS F/R issues
Thanks I will try all of that tomorrow and post an update I'm honestly about over it for the day. Random fact if I put my positive lead on the stainless seat hinge and negative on the battery I get 20.5 Volts !
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08-20-2016, 02:42 PM | #30 |
Happy Carting
Join Date: Dec 2007
Location: Southern California
Posts: 73,358
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Re: 36v EZGO Electric PDS F/R issues
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