1994 Buick Lesabre Remote Starter

Printed From: the12volt.com
Forum Name: Vehicle Wiring Information & File Requests
Forum Discription: Request Car Alarm, Car Stereo, Cruise Control, Remote Starter, Navigation, Mobile Video, and Other Vehicle Specific Wiring Info, Manuals, Tech Tips
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=19721
Printed Date: July 14, 2025 at 6:58 PM

Topic: 1994 Buick Lesabre Remote Starter

Posted By: djtrini
Subject: 1994 Buick Lesabre Remote Starter
Date Posted: October 06, 2003 at 1:22 PM

Hi guys,

I installed a ungo remote starter/alarm in a 94 Lesabre. I do know the car is equipped with the "Passkey" system.
Everything works but I can only remote start the car with the key in the ignition.

I searched on here and found out I need to put a resistor on the passkey wire, I dont have a tester to test the wire.

Do any of you know what size of a resistor I will be needing to use?

Any help would be greatly appreciated.

Thanks

Replies:

Posted By: auex
Date Posted: October 06, 2003 at 8:54 PM

For this you will need a meter. Also it is a little more then just placing a resistor inline.

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Posted By: djtrini
Date Posted: October 07, 2003 at 6:52 AM

So when I do get a meter and the correct resistor, what do I need to do to get everything working properly?

Posted By: defective
Date Posted: October 07, 2003 at 10:53 AM

you should just get an immobiliser module, they can be bought at most install bays. also DJTRINI didn't mention that you will need another factory key to do this, there is a chip in the key that the ignition needs to sense to turn the ignition on. the DEI part number is 555U it is a simple three wire box that you hide in your dash. other than that it's pretty simple, it can be done without the module but it's a nightmare to get right, this box makes it idiot-proof.

Hope i helped,

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Posted By: defective
Date Posted: October 07, 2003 at 11:38 AM

oops actually it is not this system, its called a VATS system, sorry for the misleading.

you need to use a relay, here is the setup

pin 86 - ignition output from remote start, must be isolated with a diode

pin 30 -vats computer side of non-white wire inside orange sleeve in ignition

pin 87a - ignition side of non-white wire in orange sleeve in ignition

pin 85 - ground

pin 87 - to the white wire in the orange sleeve, but through a resistor

the resistor has to match the same inpedance value as the key, so use a multimeter to test the resistor in the key, one lead on each side, dont use your fingers to hold the leads. the resistor has to be within 10 ohms of the key value.

hope i helped,

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Posted By: djtrini
Date Posted: October 10, 2003 at 2:04 PM

How do I completly bypass the system??

Posted By: djtrini
Date Posted: October 10, 2003 at 2:07 PM

oops sorry I meant how do you permanently bypass the system because my dad wants it done that way.

Thanks

Posted By: defective
Date Posted: October 11, 2003 at 1:48 PM

Attach the white wire to the other wire with the resistor between them.... idiot proof

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