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Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV.



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Old 04-21-2020, 03:56 PM   #1
tsmith_co
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Default 48v conversion - no solenoid click

Early 01 ezgo TXT Series.

I've just put in the batteries, and no click when I turn the key on or hit the pedal.

I have 48v to the alltrax sr48500 controller. I read no voltage across the selenoid. When I put the voltmeter on the switch on the FNR (blue to switch and the red jumper across switches, and the green to the pedal) - I read 33v. When I press the pedal that drops to 12v.

now, my alltrax wiring instructions do NOT show a wire from the neg end of selenoid to the B- terminal on the alltrax. My original controller had this (which is why I think I'm not getting a click or seeing voltage). The selenoid does have a wire on the neg side to the black port on the controller (part of old wire harness setup)

so - is adding that neg wire the right thing? Does that go to the battery or to the B- terminal on the controller (or doesn't matter?)

Also, is the voltage from the pedal / keyswitch right? I don't belive it is, but I'm not sure why it's low. (reads 33v at keyswitch as well blue/green)
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Old 04-21-2020, 04:22 PM   #2
JohnnieB
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Default Re: 48v conversion - no solenoid click

Quote:
Originally Posted by tsmith_co View Post
Early 01 ezgo TXT Series.

I've just put in the batteries, and no click when I turn the key on or hit the pedal.

I have 48v to the alltrax sr48500 controller. I read no voltage across the selenoid. When I put the voltmeter on the switch on the FNR (blue to switch and the red jumper across switches, and the green to the pedal) - I read 33v. When I press the pedal that drops to 12v.

now, my alltrax wiring instructions do NOT show a wire from the neg end of selenoid to the B- terminal on the alltrax. My original controller had this (which is why I think I'm not getting a click or seeing voltage). The selenoid does have a wire on the neg side to the black port on the controller (part of old wire harness setup)

so - is adding that neg wire the right thing? Does that go to the battery or to the B- terminal on the controller (or doesn't matter?)

Also, is the voltage from the pedal / keyswitch right? I don't belive it is, but I'm not sure why it's low. (reads 33v at keyswitch as well blue/green)
MS-2 on the F/R assembly ought to have one terminal with a single blue wire (to keyswitch) and two red wires (Jumper to MS-4 and wire from reed switch) on the other terminal.

From what I can determine from your description, you are measuring the voltage drop across the keyswitch.

Unless otherwise stipulated, all voltage measurements ought to be made with the DVM's negative test lead connected to the battery pack's main negative terminal (or controllers B- terminal).

All the voltages at all the switches and the solenoid coil ought to be the same as the battery pack voltage at the time. (IE: 50.9V when fully charged)

Here's an Alltrax schematic of a SR in a series drive with solenoid activation circuit highlighted.

The black wire should go to the black jack on the controller.
Attached Images
File Type: jpg SR in TXT - KSI highlighted.jpg (252.9 KB, 0 views)
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Old 04-21-2020, 04:26 PM   #3
2K6TBSS
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Default Re: 48v conversion - no solenoid click

Not sure if this would cause your problems or not.

Did you verify the red band of the diode is hooked up on the same side as the positive? Also, did you install the green resistor that came with the solenoid?
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Old 04-21-2020, 04:55 PM   #4
tsmith_co
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Default Re: 48v conversion - no solenoid click

Here’s a pic of how the FNR is wired as well as the solenoid. So the alltrax controller will pass batt - through itself out the black jumper wire to the solenoid -? (Stock controller did not)
Attached Images
File Type: jpg 56B09100-4E87-4D36-BEB0-9A1478302BA8.jpg (206.1 KB, 0 views)
File Type: jpg 39E276D8-106B-4CBF-9611-FE023D8E91F3.jpg (162.7 KB, 0 views)
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Old 04-21-2020, 06:26 PM   #5
handtools
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Default Re: 48v conversion - no solenoid click

Yes the solenoid gets it's B- from the controller. With the key on, f/r in f or r, push pedal just far enough to click the pedal microswitch does the controller power up and blink green 4 times then go steady green?
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Old 04-21-2020, 06:49 PM   #6
tsmith_co
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Default Re: 48v conversion - no solenoid click

Good to know. I will check tonight but I don’t think I saw it’s light come on earlier.
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Old 04-21-2020, 08:25 PM   #7
tsmith_co
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Default Re: 48v conversion - no solenoid click

Ok. No lights and still no clicks. Reading 33v on ms2 when in F, and 13v when it’s in reverse.
Strange. Also should all 4 posts of the back of the FNR be at 48v at the same time?
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Old 04-21-2020, 08:31 PM   #8
handtools
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Default Re: 48v conversion - no solenoid click

Ok, so now you have to go back and check the activation circuit to make sure it's wired correctly and if it is where you are losing power.
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Old 04-21-2020, 08:36 PM   #9
tsmith_co
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Default Re: 48v conversion - no solenoid click

Ok, so I think it’s my new Lester summit ii 650w. The lockout cable is what’s bringing the 33v.

According to their manual, Bluetooth is powered by the DC side (wouldn’t this be on all the time then?). The manual states that for txt lockout connector to function that a profile needs applied to it. But I can’t connect because it’s not on? (The pos and neg are connected to the batts full time)
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Old 04-21-2020, 08:55 PM   #10
tsmith_co
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Default Re: 48v conversion - no solenoid click

I’ve connected. Strange.
The device profile seems correct? This is what it was set to (attached).

At the charger, my blue lockout cable reads 33v at the terminal (I’ve disconnected it from the ms2
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File Type: jpg 131FF464-86B0-4119-A66C-36BFEE09AFD2.jpg (27.5 KB, 0 views)
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