# 2002 gem cart ride for fun motor **URL:** \ **Category:** Uncategorized\ **Created:** [October 3, 2025, 9:25pm UTC](https://community.electricforum.com/t/2002-gem-cart-ride-for-fun-motor/29773 "2025-10-03T21:25:16Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![mb10190](https://avatars.discourse-cdn.com/v4/letter/m/a6a055/32.png) [@mb10190](https://community.electricforum.com/u/mb10190)\ **Post date:** [October 3, 2025, 9:25pm UTC](https://community.electricforum.com/t/2002-gem-cart-ride-for-fun-motor/29773/1 "2025-10-03T21:25:16Z")
Hello, how do I test the ride for fun motor? It is inoperable. Thank you for any help with this MB ---
**Author:** ![mb10190](https://avatars.discourse-cdn.com/v4/letter/m/a6a055/32.png) [@mb10190](https://community.electricforum.com/u/mb10190)\ **Post date:** [October 3, 2025, 10:05pm UTC](https://community.electricforum.com/t/2002-gem-cart-ride-for-fun-motor/29773/2 "2025-10-03T22:05:49Z")
I have installed new bushes, and it passes the continuity test, I will apply 12 volts to A2 and F2 then ground F1. Is this the correct way to test the motor to see if it spins? I just what to make sure I have wired the motor correctly before I apply 12 volts. Please see attached picture. Thank you, MB Please correct me, if I wrong… ![gem motor](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/3X/5/f/5f7aa9ad9c1474ba46ecc9551be731536537a0c0.jpeg) ---
**Author:** ![AssyRequired](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/assyrequired/32/7621_2.png) [@AssyRequired](https://community.electricforum.com/u/AssyRequired)\ **Post date:** [October 4, 2025, 12:49am UTC](https://community.electricforum.com/t/2002-gem-cart-ride-for-fun-motor/29773/3 "2025-10-04T00:49:23Z")
Short answer- No. This motor will not work as you hooked it up. Don’t expect it to. It does not mean you assembled it wrong. If it passed the continuity test I’d say you are good to install. I don’t see the point of running it outside the car “just to test”. If it spins, it doesn’t really tell you much beyond that. This is somewhat risky on another factor tho. If you broke this motor down to replace the brushes, I’m sure you noticed it only has one bearing on the coupler end. The coupler end is floating. In other words-\> **This motor should not be bench tested without some support on the coupler end.** I suggest you stop what you are doing and we can discuss what you are trying to prove here. This motor needs to be mounted on the gearbox to do a run test. It uses the bearings on the input shaft to support the floating (coupler) end. Mounted on your gearbox, you will be one step closer to running your car. Hook it all back up the way it was and figure out if there is anything else wrong with your car. ---
**Author:** ![mb10190](https://avatars.discourse-cdn.com/v4/letter/m/a6a055/32.png) [@mb10190](https://community.electricforum.com/u/mb10190)\ **Post date:** [October 4, 2025, 6:20pm UTC](https://community.electricforum.com/t/2002-gem-cart-ride-for-fun-motor/29773/4 "2025-10-04T18:20:17Z")
I mounted the motor. Turn the key on load clunk from the contactor, press the go pedal and nothing… I have 72 volts on the bottom two big gauge wires of the controller going down to the motor but no voltage from the smaller two wires when pressing the go pedal. Help please! Thank you, MB, ---
**Author:** ![AssyRequired](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/assyrequired/32/7621_2.png) [@AssyRequired](https://community.electricforum.com/u/AssyRequired)\ **Post date:** [October 4, 2025, 8:57pm UTC](https://community.electricforum.com/t/2002-gem-cart-ride-for-fun-motor/29773/5 "2025-10-04T20:57:51Z")
With loud clunk on the contactor, it is getting ready to go. Does it De-clunk at any time during this test? > I have 72 volts on the bottom two big gauge wires These two big cables should be going to the A1/A2 lugs on the motor. This voltage should vary with pedal press, then drop to (near 0v) when pedal lifted. (Drop is immediate) Does it do this? (Verify Y/N?) Motor will not run with (no volts) on the F terminals. Check to make sure the F wires are good. Take a V check right at the terminals on the bottom of the controller and that this V goes straight to the motor F1/F2 lugs. I think it should detect an open circuit on the Field drivers and throw a code. Is it showing anything on the Dash display? Otherwise, First guess says you need another controller. ---
**Author:** ![mb10190](https://avatars.discourse-cdn.com/v4/letter/m/a6a055/32.png) [@mb10190](https://community.electricforum.com/u/mb10190)\ **Post date:** [October 4, 2025, 9:47pm UTC](https://community.electricforum.com/t/2002-gem-cart-ride-for-fun-motor/29773/6 "2025-10-04T21:47:29Z")
Voltage on both a1 and a2 lugs on the motor are 72 volts regardless of pedal position. There is no voltage at the bottom of the controller lug F1 or F2 Unfortunately, my bdi will not light up… ---
**Author:** ![mb10190](https://avatars.discourse-cdn.com/v4/letter/m/a6a055/32.png) [@mb10190](https://community.electricforum.com/u/mb10190)\ **Post date:** [October 4, 2025, 9:48pm UTC](https://community.electricforum.com/t/2002-gem-cart-ride-for-fun-motor/29773/7 "2025-10-04T21:48:53Z")
My contactor never dechunks during testing. ---
**Author:** ![Inwo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/inwo/32/1067_2.png) [@Inwo](https://community.electricforum.com/u/Inwo)\ **Post date:** [October 5, 2025, 12:07am UTC](https://community.electricforum.com/t/2002-gem-cart-ride-for-fun-motor/29773/8 "2025-10-05T00:07:54Z")
> [@mb10190](#): > > My contactor never dechunks during testing. > [@mb10190](#): > > Voltage on both a1 and a2 lugs on the motor are 72 volts That is unlikely if main contactor doesn’t pull in. Where are your probes when testing voltage? ---
**Author:** ![mb10190](https://avatars.discourse-cdn.com/v4/letter/m/a6a055/32.png) [@mb10190](https://community.electricforum.com/u/mb10190)\ **Post date:** [October 5, 2025, 12:08am UTC](https://community.electricforum.com/t/2002-gem-cart-ride-for-fun-motor/29773/9 "2025-10-05T00:08:16Z")
So, looks like it may be a bad controller like you said. So, moving forward I would like to know what wires going to the controller to check for power and grounds when key or key off before i send my controller out for repairs. Just need to make sure I get power and ground to the proper wires… I also think that the controller could be the reason my bdi is dead. Is that possible?? So next question would be is where I should have power and ground to the bdi so I can confirm I have a bad bdi or electrical power or ground issue going to the bdi.. Ty for your help MB ---
**Author:** ![Inwo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/inwo/32/1067_2.png) [@Inwo](https://community.electricforum.com/u/Inwo)\ **Post date:** [October 5, 2025, 1:38am UTC](https://community.electricforum.com/t/2002-gem-cart-ride-for-fun-motor/29773/10 "2025-10-05T01:38:49Z")
I’ll try to step in for Byron. He’s on a road trip. All that’s needed for bdi to come on is +72, to pin 1, and +72v to pin 2. One is from key circuit. Check the small plug, 8 pin if T1 and 12 pin if T2 controller. Bdi is powered direct from this plug. ---
**Author:** ![AssyRequired](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/assyrequired/32/7621_2.png) [@AssyRequired](https://community.electricforum.com/u/AssyRequired)\ **Post date:** [October 5, 2025, 12:12pm UTC](https://community.electricforum.com/t/2002-gem-cart-ride-for-fun-motor/29773/11 "2025-10-05T12:12:34Z")
> He’s on a road trip Have not left yet. Just Busy. > Voltage on both a1 and a2 lugs on the motor are 72 volts regardless of pedal position. This makes no sense at all. Describe how are you measuring this? (one probe on A1, the other probe on what?) > Unfortunately, my bdi will not light up This makes it very tough to diagnose issues. First test is always → When first power up [Main Battery Disconnect Switch to ON] (the turn switch under the back seat) The BDI will light up, display a couple of numbers, then go out. Does your car do this? Verify(Y/N?) ==== From your earlier post: > Turn the key on load clunk from the contactor Can you post a few pics of the wiring around your contactor? Has there been any creative wiring on this car other than factory? What is the history on this car? How long have you had it? When was it last running properly? ---
**Author:** ![mb10190](https://avatars.discourse-cdn.com/v4/letter/m/a6a055/32.png) [@mb10190](https://community.electricforum.com/u/mb10190)\ **Post date:** [October 5, 2025, 2:33pm UTC](https://community.electricforum.com/t/2002-gem-cart-ride-for-fun-motor/29773/12 "2025-10-05T14:33:19Z")
> [@AssyRequired](#): > > The BDI will light up, display a couple of numbers, then go out. > Does your car do this? Verify(Y/N?) NO BDI lights I can see if I get power to the BDI per Inwo recommendations I do have a T2 controller. > > Has there been any creative wiring on this car other than factory? Yes, looks like he may of bypass the DC/DC converter, I will put that back to factory once I get it up and running. > > I bought the cart not running, last time it ran they could smell something burnings. It never ran after that, I pulled the motor and found stuck brushes, replaced them with proper parts. Which is where I’m at now… > > Yes looks like some creative wiring doon to bypass the DC/DC converter. I will put the converter back to factory once I can get the cart running. > > ![image](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/3X/0/6/069f9fea4709fd9fd9883c90f14aaa3a20b07fc7.jpeg) ![image](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/3X/6/f/6fe36ee1ecebda724e965acccf90c48bd3835f4f.jpeg) ![image](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/3X/3/1/318a65d8aa48be27d41ce7767832c61653e50d9c.jpeg) ![image](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/3X/6/f/6fe36ee1ecebda724e965acccf90c48bd3835f4f.jpeg) ---
**Author:** ![AssyRequired](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/assyrequired/32/7621_2.png) [@AssyRequired](https://community.electricforum.com/u/AssyRequired)\ **Post date:** [October 5, 2025, 4:52pm UTC](https://community.electricforum.com/t/2002-gem-cart-ride-for-fun-motor/29773/13 "2025-10-05T16:52:15Z")
Ah, So the layers are starting to come off this onion… Did you also happen to post this problem over on the FB forum? You need to trace the wires that are powering up the Main Contactor/Relay. I bet they wired that directly to the key. This is why it is clicking (when it shouldn’t). This can be very bad on the controller. You need to go back to the previous owner and smack him on the backside of the head. > I also think that the controller could be the reason my bdi is dead. Is that possible?? Yes. The BDI is powered directly off the controller. It is the first in a series of diagnostic checks when your car is not running. If the BDI does not light up when battery switched on, then you do not go past GO, You do not collect $200. Too many hacks go immediately to the MC relay. They figure it needs to close first and the car will run. The MC is the LAST thing that closes as the car is about to run. ---
**Author:** ![mb10190](https://avatars.discourse-cdn.com/v4/letter/m/a6a055/32.png) [@mb10190](https://community.electricforum.com/u/mb10190)\ **Post date:** [October 5, 2025, 5:54pm UTC](https://community.electricforum.com/t/2002-gem-cart-ride-for-fun-motor/29773/14 "2025-10-05T17:54:19Z")
Okay then I guess I have my hands full… ---
**Author:** ![mb10190](https://avatars.discourse-cdn.com/v4/letter/m/a6a055/32.png) [@mb10190](https://community.electricforum.com/u/mb10190)\ **Post date:** [October 5, 2025, 6:42pm UTC](https://community.electricforum.com/t/2002-gem-cart-ride-for-fun-motor/29773/15 "2025-10-05T18:42:06Z")
> [@AssyRequired](#): > > > [@AssyRequired](#): > > > > (Did you also happen to post this problem over on the FB forum?) NO! should I?? > > > > I will try to get the BDI working first then revisit with codes… > > > > You need to trace the wires that are powering up the Main Contactor/Relay. I bet they wired that directly to the key. Yes sir you are correct they wired it to the key. > > > > Man, I guess I have my hands full here, I will do my best to get the BDI working, I agree with you first on the list to proper diagnosis. > > > > Thank you for your time…MB Yes, they wired the contactor to the key switch No, I have not posted this on Facebook. I will try to get the bdi working so as we can properly diagnose my issue. Any direction on properly wiring the contactor would be helpful. Thanks MB ---
**Author:** ![AssyRequired](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/assyrequired/32/7621_2.png) [@AssyRequired](https://community.electricforum.com/u/AssyRequired)\ **Post date:** [October 5, 2025, 7:07pm UTC](https://community.electricforum.com/t/2002-gem-cart-ride-for-fun-motor/29773/16 "2025-10-05T19:07:34Z")
Do you have the original wring diagram and the page of the DC Converter wiring update? How well can you read those things? ---
**Author:** ![mb10190](https://avatars.discourse-cdn.com/v4/letter/m/a6a055/32.png) [@mb10190](https://community.electricforum.com/u/mb10190)\ **Post date:** [October 5, 2025, 8:05pm UTC](https://community.electricforum.com/t/2002-gem-cart-ride-for-fun-motor/29773/17 "2025-10-05T20:05:31Z")
I do not have original wring diagram and the page of the DC Converter wiring update.. I am very confident I can read a wiring diagram. Would be able to e-mail me this info please? [mb10190@gmail.com](mailto:mb10190@gmail.com) Thank you very much. MB ---
**Author:** ![mb10190](https://avatars.discourse-cdn.com/v4/letter/m/a6a055/32.png) [@mb10190](https://community.electricforum.com/u/mb10190)\ **Post date:** [October 5, 2025, 8:14pm UTC](https://community.electricforum.com/t/2002-gem-cart-ride-for-fun-motor/29773/18 "2025-10-05T20:14:32Z")
I will do a quick search on Google for this update converter wiring diagram. ---
**Author:** ![AssyRequired](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/assyrequired/32/7621_2.png) [@AssyRequired](https://community.electricforum.com/u/AssyRequired)\ **Post date:** [October 5, 2025, 8:44pm UTC](https://community.electricforum.com/t/2002-gem-cart-ride-for-fun-motor/29773/19 "2025-10-05T20:44:01Z")
I will send you a few documents to your email address. ---
**Author:** ![mb10190](https://avatars.discourse-cdn.com/v4/letter/m/a6a055/32.png) [@mb10190](https://community.electricforum.com/u/mb10190)\ **Post date:** [October 6, 2025, 11:47am UTC](https://community.electricforum.com/t/2002-gem-cart-ride-for-fun-motor/29773/20 "2025-10-06T11:47:31Z")
> [@AssyRequired](#): > > Yes. The BDI is powered directly off the controller. It is the first in a series of diagnostic checks when your car is not running. If the BDI does not light up when battery switched on, then you do not go past GO, You do not collect $200. > > Let’s get the BDI working first. (I may have a bad BDI) So, which wires at the back of the BDI should have power when the battery switch is thrown on, (how many V) and when ![bdi](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/3X/d/3/d3b4294dd48e575bacf6d39c14120bdd48278a5f.jpeg) key switch is on/off? [Next page](https://community.electricforum.com/t/2002-gem-cart-ride-for-fun-motor/29773.md?page=2)