this post was submitted on 08 Jan 2026
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Electric Vehicles
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You perform a battery reset of the low voltage system. Disconnect HV system, disconnect the 12V battery (or batteries) then short the positive and negative battery cables together for about half an hour. Then reattach 12V battery, and then turn HV system back on. Forces all the computer modules (normally about 30-50 modules in a modern car) to reboot from their base programming. Have to do this several times a week, often fixes weird electrical issues.
Uh, on the pcb side, to discharge condensers & co. Not on the battery side.
You don't need to disconnect the HV. Electronics are all run on 12V.