# 2004 GEM dash lights up but displays 16mph and wrench **URL:** \ **Category:** GEM Forum\ **Created:** [November 17, 2020, 9:35pm UTC](https://community.electricforum.com/t/2004-gem-dash-lights-up-but-displays-16mph-and-wrench/20264 "2020-11-17T21:35:34Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![Rob68cal](https://avatars.discourse-cdn.com/v4/letter/r/2acd7d/32.png) [@Rob68cal](https://community.electricforum.com/u/Rob68cal)\ **Post date:** [November 17, 2020, 9:35pm UTC](https://community.electricforum.com/t/2004-gem-dash-lights-up-but-displays-16mph-and-wrench/20264/1 "2020-11-17T21:35:35Z")
Putting this Gem back together and when I turn the key on the dash lights up and everything but it shows 16mph on the screen and the wrench icon is lit up to the right. Won’t go but all the electronics work like the wipers, horn etc. getting 89.9 volts running 27 3.3v batteries. Not my cart doing this for a friend just kinda lost. ![image](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/2X/4/4588425eaf9ab34dc2249fd316bb5b4f54f0c216.jpeg) ---
**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:** [November 17, 2020, 11:05pm UTC](https://community.electricforum.com/t/2004-gem-dash-lights-up-but-displays-16mph-and-wrench/20264/2 "2020-11-17T23:05:51Z")
Error code 16 is over voltage. Won’t run over 86 volts. 25s or 26s lifepo4 is the most we usually run. ---
**Author:** ![LithiumGods](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/lithiumgods/32/672_2.png) [@LithiumGods](https://community.electricforum.com/u/LithiumGods)\ **Post date:** [November 17, 2020, 11:48pm UTC](https://community.electricforum.com/t/2004-gem-dash-lights-up-but-displays-16mph-and-wrench/20264/3 "2020-11-17T23:48:58Z")
at 89 volts you Have to have a voltage spoof to make it work . ---
**Author:** ![djgabriel2004](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/djgabriel2004/32/12304_2.png) [@djgabriel2004](https://community.electricforum.com/u/djgabriel2004)\ **Post date:** [November 18, 2020, 5:54am UTC](https://community.electricforum.com/t/2004-gem-dash-lights-up-but-displays-16mph-and-wrench/20264/4 "2020-11-18T05:54:05Z")
over voltage, Take a couple cells off or get a voltage spoof. ---
**Author:** ![Rob68cal](https://avatars.discourse-cdn.com/v4/letter/r/2acd7d/32.png) [@Rob68cal](https://community.electricforum.com/u/Rob68cal)\ **Post date:** [November 18, 2020, 10:49pm UTC](https://community.electricforum.com/t/2004-gem-dash-lights-up-but-displays-16mph-and-wrench/20264/5 "2020-11-18T22:49:44Z")
This spoof you speak of? What would I look up to try and find one of those? ---
**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:** [November 19, 2020, 3:42am UTC](https://community.electricforum.com/t/2004-gem-dash-lights-up-but-displays-16mph-and-wrench/20264/6 "2020-11-19T03:42:29Z")
Not what, but whom. Talk to Dave @Inwo ---
**Author:** ![Banger978](https://avatars.discourse-cdn.com/v4/letter/b/22d042/32.png) [@Banger978](https://community.electricforum.com/u/Banger978)\ **Post date:** [September 26, 2024, 1:32pm UTC](https://community.electricforum.com/t/2004-gem-dash-lights-up-but-displays-16mph-and-wrench/20264/7 "2024-09-26T13:32:22Z")
Error code 16 is over voitage, Just turn on the wiper, headlights and any other 12 v accessory to drain the battery a bit, then turn the key off , and back on, until it says zero.