Post here for mechanical and engine topics such as fuel issues, transmission problems, rough idle, exhaust, electrical issues, etc
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Got a head scratcher... Turned off the engine of my '88 M6, removed the key and multiple accessories still are powered, including radio, antenna, wipers, turn signals, and left side warning panel. Ordered and installed a new OEM ignition switch, and it works perfectly. All the key positions seem to power up the proper items and engine starts and turns off with proper key positions. The new switch made no difference to the still powered items. Have consulted the trouble shooting electrical manual, and pulled and replaced various fuses that effect the items that remain powered. Also replaced the 2 power module relays. Pulling fuses for the wipers for example does not keep the other items from remaining powered. Have installed a battery kill switch incase the computer or other silent items are getting unauthorized power. Car starts, runs, and stops normally. Any thoughts would be appreciated? I hate electricity issues!
That seems like a good idea. I just can't find any one relay that effects all the various accessories that are powered. Tracing the way positive electricity flows from the electrical troubleshooter, it seems that more than one relay could be involved. Hard to imagine more than one relay failed at the same time.. Maybe a ground went bad that combines these accessories?