Help with a 90 Marathon???

gduncdesigns · 02-22-2010, 06:35 PM

Ok.... So not to be annoying but, I picked up a 90 Ezgo for $200 and I want to try and make sure it is somewhat good before I go spending lots of money for it. It has the electronic controller in it and appears to be orginal. Checked connections all are tight and clean. Battery pack is reading 36.6 after a full charge! I know they are bad but I figure they should at least be able to turn the motor. I have jacked it up and and gone through the diagnostics check list and If I have a series or pds (non dcs) It says the resistor is bad. Is this part of the controller and how do I tell if the controller is bad? And what is this cart considered DCS? Solid State? Series? Hope I have made sense!!
Thanks!!
Greg

Paxdad · 02-22-2010, 07:21 PM

It is considered a solid state. When depressing the accelerator do you hear a clicking sound from the solenoid? What is the conditon of the forward/reverse switch contact studs?

pggroves · 02-22-2010, 07:22 PM

You have a 1990 Marathon controller cart. It's a series motor. Do you hear the solenoid engage? Have you checked all three microswitches? There are two on the FNR and one by the pot.

I type slow. Pax is on the job.

rib33024 · 02-22-2010, 07:31 PM

That battery pack is low for a full charge --

gduncdesigns · 02-22-2010, 07:51 PM

Thanks for the quick responses!! Yes the solenoid does click! How do I check the micros?

Paxdad · 02-23-2010, 06:31 PM

Check them with a multi-meter for continuity. They are either on or off (signal or no signal). I would also check the micro on the pot box. Then the pot box for signal output. it should smoothly scale from 0-5000 ohms (+/- 300-500). As you indicated earlier make sure you place jack stands under the axel when doing diagnostic/ troubleshooting.

gduncdesigns · 02-24-2010, 02:50 PM

I was able to get it to run. I checked all the wiring again and it was a bad connection. You guys were not kidding about how clean they have to be. I will start a new thread for "The Rebuild". I picked up a TXT body that I plan on putting on it. The one there now is pretty banged up.
Thanks again guys!!
Greg

Paxdad · 02-24-2010, 05:26 PM

Good luck and thanks for closing out the thread with a reply.

02-22-2010, 06:35 PM	#1
gduncdesigns Not Yet Wild Join Date: Apr 2009 Location: Fishers In Posts: 34	Help with a 90 Marathon??? Ok.... So not to be annoying but, I picked up a 90 Ezgo for $200 and I want to try and make sure it is somewhat good before I go spending lots of money for it. It has the electronic controller in it and appears to be orginal. Checked connections all are tight and clean. Battery pack is reading 36.6 after a full charge! I know they are bad but I figure they should at least be able to turn the motor. I have jacked it up and and gone through the diagnostics check list and If I have a series or pds (non dcs) It says the resistor is bad. Is this part of the controller and how do I tell if the controller is bad? And what is this cart considered DCS? Solid State? Series? Hope I have made sense!! Thanks!! Greg

02-22-2010, 07:21 PM	#2
Paxdad Gone Wild Join Date: Aug 2008 Location: Cumming, GA Posts: 313	Re: Help with a 90 Marathon??? It is considered a solid state. When depressing the accelerator do you hear a clicking sound from the solenoid? What is the conditon of the forward/reverse switch contact studs?

02-22-2010, 07:22 PM	#3
pggroves steeplejack x Join Date: Jan 2007 Location: Republic of Texas Posts: 3,382	Re: Help with a 90 Marathon??? You have a 1990 Marathon controller cart. It's a series motor. Do you hear the solenoid engage? Have you checked all three microswitches? There are two on the FNR and one by the pot. I type slow. Pax is on the job.

02-22-2010, 07:31 PM	#4
rib33024 ...................... Join Date: Apr 2009 Location: FT Lauderdale FL. Posts: 16,416	Re: Help with a 90 Marathon??? That battery pack is low for a full charge --

02-22-2010, 07:51 PM	#5
gduncdesigns Not Yet Wild Join Date: Apr 2009 Location: Fishers In Posts: 34	Re: Help with a 90 Marathon??? Thanks for the quick responses!! Yes the solenoid does click! How do I check the micros?

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02-23-2010, 06:31 PM	#6
Paxdad Gone Wild Join Date: Aug 2008 Location: Cumming, GA Posts: 313	Re: Help with a 90 Marathon??? Check them with a multi-meter for continuity. They are either on or off (signal or no signal). I would also check the micro on the pot box. Then the pot box for signal output. it should smoothly scale from 0-5000 ohms (+/- 300-500). As you indicated earlier make sure you place jack stands under the axel when doing diagnostic/ troubleshooting.

02-24-2010, 02:50 PM	#7
gduncdesigns Not Yet Wild Join Date: Apr 2009 Location: Fishers In Posts: 34	Re: Help with a 90 Marathon??? I was able to get it to run. I checked all the wiring again and it was a bad connection. You guys were not kidding about how clean they have to be. I will start a new thread for "The Rebuild". I picked up a TXT body that I plan on putting on it. The one there now is pretty banged up. Thanks again guys!! Greg

02-24-2010, 05:26 PM	#8
Paxdad Gone Wild Join Date: Aug 2008 Location: Cumming, GA Posts: 313	Re: Help with a 90 Marathon??? Good luck and thanks for closing out the thread with a reply.