# 2012 GEM Troubleshooting- No movement **URL:** \ **Category:** GEM Forum\ **Created:** [December 29, 2025, 12:04pm UTC](https://community.electricforum.com/t/2012-gem-troubleshooting-no-movement/30058 "2025-12-29T12:04:23Z")\ **Posts on this page:** 20\ **Page:** 2
**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:** [December 29, 2025, 4:51pm UTC](https://community.electricforum.com/t/2012-gem-troubleshooting-no-movement/30058/21 "2025-12-29T16:51:57Z")
Hmmm… OK. Let’s look at the controller plug. Known around here as the 23p. (on top of motor controller up front under hood) The wire I am looking for is P13. The doc I have open shows it as a Blu/Or (possibly wire colors changed?) ![23p connector num](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/2X/9/90ff2cf7354052f98fa48d0bd4cfe7713c70fa25.jpeg) Inspect that wire (It may have evidence of probing). This wire may not be connecting with the pin in the controller. You say you made a breakout adapter for this plug? (nice!). Is this adapter using nice/tight pins/sockets? Can you verify Pin13 going low (B- ) with handbrake down? (assuming relay plugged back into socket). Also P13 goes high when Handbrake up. ---
**Author:** ![Coastalev](https://avatars.discourse-cdn.com/v4/letter/c/e480ec/32.png) [@Coastalev](https://community.electricforum.com/u/Coastalev)\ **Post date:** [December 29, 2025, 5:10pm UTC](https://community.electricforum.com/t/2012-gem-troubleshooting-no-movement/30058/22 "2025-12-29T17:10:06Z")
For my breakout, I have soldered every pin and to the best of my knowledge, everything seems to be tight and good. Results: I removed my connector to reduce connections and I backprobed the connector (it is Blue/Orange) while attached to the controller. Interesting….I have continuity to the B- post on the controller whether the parking brake is up or down. ---
**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:** [December 29, 2025, 5:16pm UTC](https://community.electricforum.com/t/2012-gem-troubleshooting-no-movement/30058/23 "2025-12-29T17:16:22Z")
> [@Coastalev](#): > > Interesting….I have continuity to the B- post on the controller whether the parking brake is up or down. Try measuring V? (instead of ohms) Remove associated cube relay? Still… if at B- potential, the light should be out. ---
**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:** [December 29, 2025, 7:50pm UTC](https://community.electricforum.com/t/2012-gem-troubleshooting-no-movement/30058/24 "2025-12-29T19:50:54Z")
In case anybody was following this topic this morning, we did not end it on purpose. The forum bots cut Coastal off from further posting (since he is a new guy). He and I took it private until he has full member access. So far, we are focusing on several bad connections related to the 23p connector. The Brake light is now OFF Foot Pedal overvolt appears to be cleared Now chasing down a few other issues. Will come back with updates as they are solved. ---
**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:** [December 30, 2025, 1:44am UTC](https://community.electricforum.com/t/2012-gem-troubleshooting-no-movement/30058/25 "2025-12-30T01:44:33Z")
> [@Coastalev](#): > > When I check my voltages on the 23 pin for the pedal my 5V reference goes from 4.8V with pedal unplugged to 3.0V with it plugged in. My wiper is stuck at 0.1V. 5v ref is very low. T4 controller uses pot type throttle and wot wiper should go over 3v. This won’t be possible with 3v ref. Output will always be .5v lower than ref. Not your issue with not running, but will limit performance. My pedals are tested to be over 3v output. The .1v output, however, will not allow car to move. ---
**Author:** ![JarJarJava](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/jarjarjava/32/15158_2.png) [@JarJarJava](https://community.electricforum.com/u/JarJarJava)\ **Post date:** [December 30, 2025, 1:45am UTC](https://community.electricforum.com/t/2012-gem-troubleshooting-no-movement/30058/26 "2025-12-30T01:45:46Z")
> [@AssyRequired](#): > > . He and I took it private until he has full member access. Show me in the doll where the bad man touched you… Btw, serious note this this thread is awesome. It harkens back to the chain pms and threads when all of the usual suspects, even us late guys like you and i were all trying to pull off some new conversation ---
**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:** [December 30, 2025, 1:53am UTC](https://community.electricforum.com/t/2012-gem-troubleshooting-no-movement/30058/27 "2025-12-30T01:53:34Z")
> [@Coastalev](#): > > its a rebuilt ride 4 fun pedal assembly We don’t know what that is, but I would love to see one. Even more so that it is overloading pin 9. Building pot boxes is a challenge as the ref is internally current limited to a very small value. Pedals are not rebuildable to the best of my knowledge. Bob sends them out and claims no idea what is done to them. Only that they work with no complaints. It’s possible that the internals are swapped to hall effect, which would explain the overloaded ref supply. Now I’m more interested in you pedal than I am at getting you running. 🙂 Never fear Byron is the Gem guru. We have different trouble shooting techniques. So I will step aside for other than throttle issues. My domain! 🙂 ---
**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:** [December 30, 2025, 1:57am UTC](https://community.electricforum.com/t/2012-gem-troubleshooting-no-movement/30058/28 "2025-12-30T01:57:42Z")
> [@JarJarJava](#): > > Btw, serious note this this thread is awesome As is the op. I made breakout boxes for 23p connector for a while. Included programming port and switches to use Sentry monitor. It had traces for status leads, but never went beyond breakout capability. ---
**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:** [December 30, 2025, 2:09am UTC](https://community.electricforum.com/t/2012-gem-troubleshooting-no-movement/30058/29 "2025-12-30T02:09:26Z")
> [@AssyRequired](#): > > He and I took it private until he has full member access. > > So far, we are focusing on several bad connections related to the 23p I am interested in where you are going and your opinion on some things, if you can add me to pm. ---
**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:** [December 30, 2025, 2:13am UTC](https://community.electricforum.com/t/2012-gem-troubleshooting-no-movement/30058/30 "2025-12-30T02:13:01Z")
@Coastalev changed trust level 3 ---
**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:** [December 30, 2025, 2:14am UTC](https://community.electricforum.com/t/2012-gem-troubleshooting-no-movement/30058/31 "2025-12-30T02:14:20Z")
> [@Inwo](#): > > We don’t know what that is, but I would love to see one. Even more so that it is overloading pin 9. I see your image now. I can’t unsee it. ---
**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:** [December 30, 2025, 2:16am UTC](https://community.electricforum.com/t/2012-gem-troubleshooting-no-movement/30058/32 "2025-12-30T02:16:08Z")
> [@AssyRequired](#): > > Foot Pedal overvolt appears to be cleared > > Now chasing down a few other issues. Pin9 volts are now? What changed? ---
**Author:** ![Coastalev](https://avatars.discourse-cdn.com/v4/letter/c/e480ec/32.png) [@Coastalev](https://community.electricforum.com/u/Coastalev)\ **Post date:** [December 30, 2025, 3:00am UTC](https://community.electricforum.com/t/2012-gem-troubleshooting-no-movement/30058/33 "2025-12-30T03:00:13Z")
Ok, trying to see if I got permissions again. Love this group, I am all about it. As for the pedal I have here, I have complaints but that’s for a different day I suppose. Where we ended up on the day is: several pins in the 23 pin were throwing some gremlins out there. I pulled each pin, adjusted the prongs to ensure solid contact, reseated, and swapped out the red faceplate to a new one with both tabs in tact. Brake light finally working as it should. Sitting at an error code of 08 on the dash which leads back to the pedal. I have a pedal getting to me tomorrow to try (i had ordered it prior to these conversations). Its from an 02 blazer- found a thread on here that led me down that rabbit hole and figured it was worth a shot. I will let you all know what it looks like once it arrives. ---
**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:** [December 30, 2025, 3:27am UTC](https://community.electricforum.com/t/2012-gem-troubleshooting-no-movement/30058/34 "2025-12-30T03:27:02Z")
You won’t find an auto pedal that works as-is. Let us know if it does. ---
**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:** [December 30, 2025, 3:28am UTC](https://community.electricforum.com/t/2012-gem-troubleshooting-no-movement/30058/35 "2025-12-30T03:28:51Z")
Strange that initial test was low voltage on p7. .1v -8 fault is high voltage on key up. ![image](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/3X/9/9/997ed73c3815419c62c0cf7b70e61463da1ab7e8.png) ---
**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:** [December 30, 2025, 3:31am UTC](https://community.electricforum.com/t/2012-gem-troubleshooting-no-movement/30058/36 "2025-12-30T03:31:00Z")
I can send you a new pot box if you want. Tested working. That is one of two products I offer. The other being Magic Magnet. Still have a few high voltage battery kits, but mostly out of the battery business. ---
**Author:** ![Coastalev](https://avatars.discourse-cdn.com/v4/letter/c/e480ec/32.png) [@Coastalev](https://community.electricforum.com/u/Coastalev)\ **Post date:** [December 30, 2025, 3:38am UTC](https://community.electricforum.com/t/2012-gem-troubleshooting-no-movement/30058/37 "2025-12-30T03:38:53Z")
Not super optimistic but figured it was worth a shot. I was grasping before today. ---
**Author:** ![Coastalev](https://avatars.discourse-cdn.com/v4/letter/c/e480ec/32.png) [@Coastalev](https://community.electricforum.com/u/Coastalev)\ **Post date:** [December 30, 2025, 3:39am UTC](https://community.electricforum.com/t/2012-gem-troubleshooting-no-movement/30058/38 "2025-12-30T03:39:14Z")
I believe its sitting at about 1.5 now. ---
**Author:** ![Coastalev](https://avatars.discourse-cdn.com/v4/letter/c/e480ec/32.png) [@Coastalev](https://community.electricforum.com/u/Coastalev)\ **Post date:** [December 30, 2025, 3:40am UTC](https://community.electricforum.com/t/2012-gem-troubleshooting-no-movement/30058/39 "2025-12-30T03:40:59Z")
Lets come back to this tomorrow on the pot box. This cart has your magic magnet on it but I have a couple others that might need it. I am interested to learn more about your battery kits if you want to pm me. ---
**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:** [December 30, 2025, 3:41am UTC](https://community.electricforum.com/t/2012-gem-troubleshooting-no-movement/30058/40 "2025-12-30T03:41:31Z")
> [@Coastalev](#): > > 02 blazer But -8 tells us over .9 volts. Pin 7 = wiper. [Previous page](https://community.electricforum.com/t/2012-gem-troubleshooting-no-movement/30058.md?page=1) [Next page](https://community.electricforum.com/t/2012-gem-troubleshooting-no-movement/30058.md?page=3)