Charger won’t turn on/charge ‘90 Marathon

HeatLightnin · 06-22-2018, 10:04 AM

Hi folks! Long time lurker, new member here.

I use a Schumacker INC-3625A charger on my 1990 Marathon 36V series cart. I recently encountered problems with my charger not turning on to charge the batteries. At that point I checked the batteries and they were dead...had them for many years but it was time for new ones anyway. After installation of 6 new 6V batteries, the cart runs great.

So after a quick test run, I plug the charger in...nothing. No indicator light, no kicking ON and humming internally. I did my homework on the subject (tried to anyway), checked several things before posting here. Here’s what I know:

Pack voltage is 37.4 V
Cart is wired up properly
Voltage was appropriate from the wall outlet
Continuity tested good for the following items on the charger:
Charger power cord
Charger cable plug
Lighted ON switch (which is dimmer than usual, by the way)
Relay
40 amp fuse
Transformer

The only unknown that I’m not sure how to test for on this charger is the heat sink power board which from what I have read may be the culprit. If anyone is familiar with this type of charger or can think of anything I have overlooked, your guidance would be much appreciated.

Thanks!

cgtech · 06-22-2018, 01:02 PM

You have pack voltage on the charge port on the cart?

HeatLightnin · 06-22-2018, 02:03 PM

37.36 V

I also checked pack voltage with charger plugged in and was the same...37.36 V

HeatLightnin · 06-23-2018, 07:46 AM

Morning bump

06-22-2018, 10:04 AM	#1
HeatLightnin Not Yet Wild Join Date: Sep 2015 Posts: 5	Charger won’t turn on/charge ‘90 Marathon Hi folks! Long time lurker, new member here. I use a Schumacker INC-3625A charger on my 1990 Marathon 36V series cart. I recently encountered problems with my charger not turning on to charge the batteries. At that point I checked the batteries and they were dead...had them for many years but it was time for new ones anyway. After installation of 6 new 6V batteries, the cart runs great. So after a quick test run, I plug the charger in...nothing. No indicator light, no kicking ON and humming internally. I did my homework on the subject (tried to anyway), checked several things before posting here. Here’s what I know: Pack voltage is 37.4 V Cart is wired up properly Voltage was appropriate from the wall outlet Continuity tested good for the following items on the charger: Charger power cord Charger cable plug Lighted ON switch (which is dimmer than usual, by the way) Relay 40 amp fuse Transformer The only unknown that I’m not sure how to test for on this charger is the heat sink power board which from what I have read may be the culprit. If anyone is familiar with this type of charger or can think of anything I have overlooked, your guidance would be much appreciated. Thanks! Last edited by HeatLightnin; 06-22-2018 at 10:07 AM.. Reason: Clarity
HeatLightnin Not Yet Wild Join Date: Sep 2015 Posts: 5

06-22-2018, 01:02 PM	#2
cgtech Over This Interview Is... Join Date: Jun 2012 Location: AZ Posts: 17,449	Re: Charger won’t turn on/charge ‘90 Marathon You have pack voltage on the charge port on the cart?

06-22-2018, 02:03 PM	#3
HeatLightnin Not Yet Wild Join Date: Sep 2015 Posts: 5	Re: Charger won’t turn on/charge ‘90 Marathon 37.36 V I also checked pack voltage with charger plugged in and was the same...37.36 V
HeatLightnin Not Yet Wild Join Date: Sep 2015 Posts: 5

06-23-2018, 07:46 AM	#4
HeatLightnin Not Yet Wild Join Date: Sep 2015 Posts: 5	Re: Charger won’t turn on/charge ‘90 Marathon Morning bump
HeatLightnin Not Yet Wild Join Date: Sep 2015 Posts: 5

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