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Will not start and security alert blinking

Tiny
DAVID WHITTEKER
  • MEMBER
  • 1995 JEEP GRAND CHEROKEE
  • 5.0L
  • V8
  • 4WD
  • AUTOMATIC
  • 200,000 MILES
Cleaned battery connectors. Replaced the connector and now the alert comes on, blinking lights and car won't start. There's a red light on the dash board says "Security".
Wednesday, September 8th, 2021 AT 1:17 PM

1 Reply

Tiny
CARADIODOC
  • MECHANIC
  • 33,916 POSTS
The system arms when the battery is reconnected, but the horn doesn't sound. Unlock a front door with the key to turn the alarm off. If that doesn't work from one of the doors, suspect there are broken or frayed wires between the door hinges.

Standard practice is to use some type of memory saver device while replacing the battery or while the cables are disconnected for some other service.

https://www.2carpros.com/articles/how-to-reset-a-security-system

This is much more important on newer models where multiple computers will lock up, requiring a tow to the dealer. VW and BMW are the worst offenders at this designed-in nightmare.
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Wednesday, September 8th, 2021 AT 4:16 PM

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