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I have a '98 Buick Century with a Loctronics antitheft

Customer Question
I have a '98...

I have a '98 Buick Century with a Loctronics antitheft system that just stopped working. I'm looking for a way to bypass it.

Mechanic's Assistant: Are you fixing your Century yourself? What have you tried so far?

Yes and confirmed battery is charged and ignition systems work (with the exception of the starting). Everything was working last night. I've had some issues with the Loctronics in the past, but it worked with some wiggling.

Mechanic's Assistant: Will the headlights turn on? Is the battery fully charged?

Yes

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

No, just want to bypass the loctronics.

Submitted: 10 months ago.Category: Buick
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Answered in 2 minutes by:
10/1/2017
Buick Mechanic: Dan, Technician replied 10 months ago
Dan
Dan, Technician
Category: Buick
Satisfied Customers: 26,039
Experience: Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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Buick Mechanic: Dan, Technician replied 10 months ago

When this system stops working it usually means the ignition lock cylinder has failed and not reading the resistance in chip built into key. To bypass you first need to check resistance of chip in key then install the same size resistor between the purple/white and white/black wires going into the lock cylinder. Let me know if you have more questions. Thanks.

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Customer reply replied 10 months ago
The Security light goes off. Doesn't that usually mean that the lock cylinder recognizes the resistance chip?
Buick Mechanic: Dan, Technician replied 10 months ago

Usually, why do you think problem is security related?

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