Snoopy11 5,713 #1 Posted September 4, 2022 Hello my good people SO... I am starting to get around to my next project that I am going to be working on over the next few weekends. It is a 1985 EZ GO golf cart... and it has some issues. Unfortunately, on this machine, the motor had actually rolled forward upon heavy braking... and the positive terminals came into contact with the frame. NOW... the machine will not run at all. I do believe that the frame is broken in the rear... so I will be repairing... maybe even replacing that. What I don't know is if the motor itself is bad... or if any of the electronics are bad. The question is... what got fried... @Evguy... I don't know if you can stay tuned to this thread... but I'd appreciate it. You can see on the front of the motor where it actually rolled downwards and the positive terminals contacted the frame. I haven't had a chance to get under this cart yet, but I am most positive that the leaf springs broke free from their mounts causing this to happen. There are 2 more wires that go to the back of this motor... so a total of 4 wires going to the motor. I don't know how to test the speed controller or any of the other electrical equipment. This one is going to be a VERY big deal... I think I will start on this machine next weekend... so hopefully I can gather some intelligence before then... Don 1 Share this post Link to post Share on other sites
Snoopy11 5,713 #2 Posted September 4, 2022 (edited) 12 minutes ago, Snoopy11 said: hopefully I can gather some intelligence Something about that just doesn't sound right... Don Edited September 4, 2022 by Snoopy11 1 Share this post Link to post Share on other sites
Evguy 546 #3 Posted September 4, 2022 (edited) If there isn’t a fuse, I would guess motor controller is a paperweight. Motor can be tested by unhooking it from cart electrical and using a power supply or battery and test spin it. How many volts? 48 or 36. I have a controller laying around somewhere. Sounds like a bit of a job, I always wanted a golf car but I would probably just modify it to insane levels Edited September 4, 2022 by Evguy 2 Share this post Link to post Share on other sites
Snoopy11 5,713 #4 Posted September 4, 2022 18 minutes ago, Evguy said: 36 I think there is an old one in the shop... A good while ago I think this cart was upgraded to a faster speed controller... so the old one should be somewhere around here.. DEFINITELY no fuse... Don Share this post Link to post Share on other sites
Snoopy11 5,713 #5 Posted September 5, 2022 (edited) Posting this here for my own reference... and for any future thread viewers... Check Power Output From the Controller Connect the negative probe to the controller's M terminal and positive probe to the B+ terminal. Press the accelerator and watch to see if the voltage increases. It should increase from a reading of 0 to the full voltage of the battery. If the motor is not turning, the problem may be in the directional switch or motor. If there is no voltage, the controller is bad and must be replaced. Don Edited September 5, 2022 by Snoopy11 Share this post Link to post Share on other sites
Evguy 546 #6 Posted September 5, 2022 Looks like you’re on the right road.. any results? Share this post Link to post Share on other sites
Snoopy11 5,713 #7 Posted September 5, 2022 Just now, Evguy said: Looks like you’re on the right road.. any results? No... I won't get to actually physically working on the cart until this weekend. Too many things going on with classes, lectures, meetings, assigned reading, quizzes, papers, discussion boards... not to mention looking at 12 other people's papers to tutor them on how to put "number 1" in the running head of their papers... blah blah blah... I did get a chance to peek under the back of it yesterday though. What I saw made profanity protrude through my lips... BOTH rear hangers are broken for the leaf springs... That is going to require a lot of work to fix. I'll probably pick up a roll ...or 2... of welding wire later this week. Don Share this post Link to post Share on other sites
Evguy 546 #8 Posted September 5, 2022 Make it stronger, may as well lift it too 😆 Share this post Link to post Share on other sites
Snoopy11 5,713 #9 Posted September 5, 2022 1 minute ago, Evguy said: may as well lift it too I'd love to... only problem with that is... the female lady women would run me over with it if I did... I don't think they would like it any taller than it is... then they'd have to 'climb' into it... Don Share this post Link to post Share on other sites
Vurge 157 #10 Posted September 8, 2022 (edited) Just a heads up if you start researching the controller. I've worked on a couple golf carts including two EZGO models. You might have a 1985 body/frame, but that controller is definitely a later modification. I think my 94.5 EZGO Marathon was when they first switched to the solid state controller and yours is a newer version. Looks like the one on my 2010 TXT. Haven't had any need to work on the TXT, but I've upgraded an older electrical cart to solid state using a Marathon controller. This manual may be helpful to you in testing the controller and motor. I think that might be your controller (check the label) on Page 47. EZGO 36v Technician's Repair Manual Edited September 8, 2022 by Vurge 1 Share this post Link to post Share on other sites
Snoopy11 5,713 #11 Posted September 12, 2022 On 9/8/2022 at 1:42 PM, Vurge said: This manual may be helpful to you in testing the controller and motor. I think that might be your controller (check the label) on Page 47. Hey @Vurge... that manual link does not work. I did find some information online about testing it though... and after a bit of testing this morning... I am 98% sure it is roached... I was able to find the old controller though... so hopefully I will be able to put that in this weekend... and get some more stuff done on it now that I have the truck all buttoned back up. @Evguy we are getting closer and closer to the 24th!!! I think I can get everything on this cart done this weekend... so I am on schedule! Don 1 Share this post Link to post Share on other sites
Snoopy11 5,713 #12 Posted September 21, 2022 Quick update on this thread I was able to fix the frame on this golf cart last weekend... so everything is ready to go. I put a new controller in it... tested the motor, and everything seems to work. I did not want to put the 6 volt acid batteries back in this cart. The acid leaks, eats the frame, causes more issues. SO... I decided to go with sealed deep cycle batteries, 3 --12 volt deep cycle batteries in a series. They are 109 AH per battery, which should be more than enough for what this cart is used for (going to check the mail, etc). I bought the batteries along with a custom charger... so hopefully everything will be fine with that. Don 2 Share this post Link to post Share on other sites
davem1111 1,932 #13 Posted September 21, 2022 On 9/5/2022 at 3:39 PM, Snoopy11 said: No... I won't get to actually physically working on the cart until this weekend. Too many things going on with classes, lectures, meetings, assigned reading, quizzes, papers, discussion boards... not to mention looking at 12 other people's papers to tutor them on how to put "number 1" in the running head of their papers... blah blah blah... 1 Share this post Link to post Share on other sites
Oldskool 6,582 #14 Posted September 21, 2022 Wow I just found this thread. You had it fixed before I even read it. Was going to follow lol. I have a cart I was given. I was going to get it going in some way for the kids to use at camp. 1 Share this post Link to post Share on other sites
Snoopy11 5,713 #15 Posted September 21, 2022 1 hour ago, Oldskool said: Wow I just found this thread. You had it fixed before I even read it. HAHAHAHA... Yessir, now just a matter of batteries and a charger and it should roll again!!! Don 1 Share this post Link to post Share on other sites
Snoopy11 5,713 #16 Posted September 29, 2022 New batteries, new charger. It rolls and charges. Don 1 Share this post Link to post Share on other sites
Snoopy11 5,713 #17 Posted October 2, 2022 "tis finished... Don 3 Share this post Link to post Share on other sites
Snoopy11 5,713 #18 Posted December 18, 2022 Found some metal fatigue today that I had to fix. I was having steering issues... loose steering... etc... finally got around to fixing it. Also have been having a few issues related to the key switch. The cart does not shut off when the key is turned off... (the switch has been going bad for a while... it would stop and restart without warning... had a hard time figuring out what was wrong... now it just stays on all the time)... I ordered a new key switch... Don 1 Share this post Link to post Share on other sites
