compustar, 2001 oldsmobile alero
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=97195
Printed Date: May 13, 2025 at 8:05 AM
Topic: compustar, 2001 oldsmobile alero
Posted By: brian1977
Subject: compustar, 2001 oldsmobile alero
Date Posted: September 17, 2007 at 10:13 AM
I'm installing a compustar 2W900FM-S and am having problems with the lock and unlock. It is on an 2001 Oldsmobile Alero. I used a 1500 ohm resistor and relays and nothing is happening. Is there any way to test the lock and unlock wires coming from the brain to see if there is anything wrong with the wire? Or any other suggestions to what could be the problem.
Replies:
Posted By: chadwa2003
Date Posted: September 17, 2007 at 11:35 AM
You need to use a dmm and test the output wires on the compustar. Disconnect them from the vehicle wires and set the meter to ohms and measure the resistance to ground or test for voltage if there is any voltage on the wires than the transistorized output on the compustar is blown where did you get the unit from?
Posted By: brian1977
Date Posted: September 17, 2007 at 1:00 PM
When I test the wires with the dmm set to ohms it reads about 1.9 for the unlock wire and about 2.3 for the lock wire. Voltage is only about 0.01 or so on each wire. I got the unit off of ebay.
Posted By: chadwa2003
Date Posted: September 17, 2007 at 1:27 PM
Are your relays wired up correctly do they click when you lock or unlock with the compustar
Posted By: brian1977
Date Posted: September 17, 2007 at 1:31 PM
I'm pretty sure they are correct, they don't click though. I used this diagram to wire them. https://64.85.6.129/extrainfo/diagrams/26500_ALERO_ALERO%201%20WIRE%20JBS%20UNITS.pdf
Posted By: chadwa2003
Date Posted: September 17, 2007 at 2:04 PM
As long as you followed the diagram that is what is needed. If you take the black wire or pin 86 on the relay and ground it does the relay click
Posted By: xtremej
Date Posted: September 17, 2007 at 4:56 PM
Try it without relays. Its just a ground pulse.
Posted By: brian1977
Date Posted: September 17, 2007 at 7:32 PM
Tried without the relays and it still does nothing. When the wires are connected the lock/unlock button on the car door does not work.
Posted By: chadwa2003
Date Posted: September 17, 2007 at 9:22 PM
If the wires are disconnected do the locks work then if they don't chances are you blew a fuse
Posted By: brian1977
Date Posted: September 18, 2007 at 6:06 AM
Yes they work when the wires are disconnected.
Posted By: chadwa2003
Date Posted: September 18, 2007 at 4:17 PM
Try getting new relays it's not very likely but they could be bad. I haven't really ever seen them go bad I would definately recheck your relay configurations
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