Instrument cluster gauges, panel lamps, and electric door locks may not operate, and the courtesy lamps may remain on. These faults are commonly caused by "logic lock-up" of the body control module (BCM). If this is the case the BCM should be replaced with a revised version.
Various Electrical Issues Due to Internal Body Control Module Failure on Chrysler New Yorker
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My Problem Started in when a Short was found in Vanity Mirrors & Dimmer Turn Signal Switch. Replaced Battery & Dimmerswitch. ABS Trouble Light came on. Now Transmission would not shift out of second gear. But now have several Electrical Issues. Checked all fuses & Relays. Alternator & Battery. All Good. No Poewer to Lights, Power Door Locks & Windows. Radio A/C Controls Radiator Cooling Fans. It seems to be ok after removing Battery Cables to reset BCM. But a Surge or Failure is exploding Bulbs for #3 Brake Light. These Bulbs Blow & all kinds of Problems Start. Car Has New Battery, Alternator & Belt, Dimmer & Head Light switch & Relay for Transmission. I am Checking all Connection for Ground & Contact not corroded or Damage. Has 157000 miles now & has been a Reoccuring Problem. Security System seems to be the weak link. Reset it by cycling key 3 times in left & or Right door. Seems to reset system. Do this everytime Loss of Power or any repair to Vehicle.
All instrument s failed