Security system preventing vehicle from starting

1991 PLYMOUTH VOYAGER
219,000 MILES • 3.3L
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JACQUES4735
  • MEMBER
  • 1 POST
Good morning, I have the vehicle listed above (le) that I have been locked out by the security. I have checked out some wiring and I have no signal from the ignition to the relay but I am not sure if it has a chip key. but have been told that year came without a chip key. Is there a way to bypass or reset the security? And do you know if it actually came with a chip?
Jun 29, 2021 at 2:39 AM
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CARADIODOC
  • ✓Experienced Mechanic
  • 34,397 POSTS
I'm pretty sure '91 models didn't come with an anti-theft system. Those require a Body Computer, and '92 was the first year for those in the minivans. If you have a late production '91, it might actually be a '92 model. If that is the case, the anti-theft system is turned off by unlocking a front door with the key. When that doesn't work, it is almost always due to broken wires between the door hinges.

What are the symptoms when you open a door and when you try to start the engine? Can you hear the hum of the fuel pump for one second when you turn on the ignition switch? Chrysler didn't use chips in their keys. That's a GM thing.
Jun 29, 2021 at 1:21 PM
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