testing bcm
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=23975
Printed Date: July 13, 2025 at 6:10 PM
Topic: testing bcm
Posted By: clearman
Subject: testing bcm
Date Posted: January 05, 2004 at 12:20 PM
Is there any way to test the bcm on a 93 pontiac trans am. I have no power to anything now, and I'm wondering if this might be it.
Replies:
Posted By: Geeque
Date Posted: January 05, 2004 at 3:51 PM
Go to junk yard and purchase a bcm, plug it in and see if that works.
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Gary Kline
MECP Master Technician
Posted By: clearman
Date Posted: January 05, 2004 at 8:17 PM
I would like to find out if mine works so that I don't have to buy a new one. Is there any way to test the one that I currently have?
Posted By: geepherder
Date Posted: January 05, 2004 at 9:39 PM
I don't know how, but the local dealer should be able to walk you through it as long as you have the vehicle.
Posted By: auex
Date Posted: January 05, 2004 at 10:03 PM
Have you checked all of the fuses in the car? Is your battery dead?
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Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.
I've been sick lately, sorry I won't be on much.
Posted By: clearman
Date Posted: January 06, 2004 at 2:05 AM
Yes, I checked every fuse I could find and checked the battery. There is no power to anything, no matter what. I will try to contact the dealer or an auto parts store to see if they know how to test it.
Posted By: sparkie
Date Posted: January 06, 2004 at 6:04 PM
You say you have no power to anything. Do you mean to say there is no power to any fuses or just the BCM. There isn't any way to test a BCM other than to diagnosis it in the vehicle. There should be orange wires which have battery power and pink ones which have ignition power. Check these.
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sparky
Posted By: auex
Date Posted: January 06, 2004 at 8:25 PM
I hate to say this, but the bcm doesn't control everything. I don't quite understand why you are worrying about the bcm when you don't have any power anywhere. You probably have a dead battery. Go buy a 9 dollar digital multimeter at checker or autozone and see if the battery has any power, or you could just take the battery and have it tested.
-------------
Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.
I've been sick lately, sorry I won't be on much.
Posted By: geepherder
Date Posted: January 07, 2004 at 12:20 AM
I was under the impression he meant no power locks/windows (accessories), but if that's not the case, I agree. Check the battery and all connections. Check the ground cable to the negative battery terminal.
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