Security system preventing vehicle from starting

JACQUES4735

MEMBER
1991 PLYMOUTH VOYAGER
3.3L
219,000 MILES

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?

1 Reply

CARADIODOC

MECHANIC
33,723 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.