Jeep Grand Cherokee Start Stop Disabled & Module Communication Nightmare | Battery Swap Gone Wrong

In this video, I troubleshoot a 2021 Jeep Grand Cherokee that’s flashing the “Start Stop System Disabled” message. Another shop replaced the batteries, but instead of fixing it, now the windows don’t work, seats won’t move, and multiple control modules aren’t communicating. I break down what really happened, how to diagnose the issues, and what it takes to get this Jeep back to normal. If you’re dealing with start/stop issues or module communication problems after battery swaps, this video is for you. Want to support us AND get early access to the SMA videos as they are uploaded? Consider joining the SMA "YouTube Membership" by clicking here:    / @southmainauto   You are also able to support us on Patreon if you feel inclined to do so by clicking here:   / southmainauto   CHECK OUT OUR "SMA SWAG" STORE! Go on Teespring and get your very own SMA merch! https://teespring.com/stores/the-sma-... If you don't like Patreon feel free to use the "PayPal Me" link: https://www.paypal.me/SouthMainAuto The South Main Auto Amazon Store: https://www.amazon.com/shop/southmain... AES Wave Automotive Diagnostic Tools: https://www.aeswave.com/cart.php?m=af... Thank you so much for the support! --Eric & Vanessa O. Feel like sending some swag to SMA because you love the videos but don't know where to send it? Just ship it here: South Main Auto Repair 47 S. Main St PO Box 471 Avoca, NY 14809 Disclaimer: Due to factors beyond the control of South Main Auto Repair, we cannot guarantee against unauthorized modifications or improper use of the information provided in this video. South Main Auto Repair assumes no liability for property damage or personal injury resulting from the use of any tools, equipment, chemicals, lubricants, or information presented. We strongly recommend following safe practices when working with power tools, automotive lifts, jack stands, electrical equipment, blunt instruments, or any other tools and equipment shown or implied in this video. No information in this video creates any express or implied warranty or guarantees any particular result. Use this information responsibly and at your own risk. #JeepGrandCherokee #StartStopDisabled #AutoRepair #JeepProblems #BatterySwapIssues #ModuleCommunication #CarDiagnostics #MechanicLife