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2015 GMC Terrain, Compustar CM-900AS


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britton0055 
Member - Posts: 3
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Joined: February†05, 2024
Location: Ohio, United States
Posted: February†06, 2024 at 5:52 AM / IP Logged Link to Post Post Reply Quote britton0055
Hello to all I have 2015 GMC Terrain I have had a compustar remote start alarm hooked up for a couple months. I changed the battery and now I canít get the car to start or even crank I have power to all things except the lights inside the car do not work. Is is a it is a CM-900AS with BL I have checked all fuses in the car any help would be much appreciate
kreg357 
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Joined: January†30, 2009
Location: Pennsylvania, United States
Posted: February†06, 2024 at 10:26 AM / IP Logged Link to Post Post Reply Quote kreg357
It's very unusual for a properly installed Compustar system to brick a vehicle after a simple battery replacement. I would definitely check the vehicle fuses and fusible links closely before jumping on the R/S system.
That being said...
Did you do the install yourself? Wondering how familiar you are with the system. Below is a current diagram of the Blade AL install for your vehicle :
2015 GMC Terrain, Compustar CM-900AS -- posted image.
To test to see if the R/S system is causing the issue you could pull the two fuses, unplug the black 20 pin Blade harness and reconnect the one cut vehicle wire ( circled in red ).
Soldering is fun!
britton0055 
Member - Posts: 3
Member spacespace
Joined: February†05, 2024
Location: Ohio, United States
Posted: February†06, 2024 at 11:10 AM / IP Logged Link to Post Post Reply Quote britton0055
I did not do the install my issue is I canít see any other fuses other than the one close to the cm900as brain I canít seam to find where the other things are
kreg357 
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Platinum spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Security and Convenience. Click here for more info.spacespace
Joined: January†30, 2009
Location: Pennsylvania, United States
Posted: February†06, 2024 at 12:14 PM / IP Logged Link to Post Post Reply Quote kreg357
A blown fuse on the CM900 wouldn't cause your issue.
Not sure on your next step. If you feel comfortable with taking a few trim panels off to get to the R/S and the vehicles BCM, you could try the above posted test.
If the CM900 20 Pin Blade harness was loose or unplugged you could get the "no start" condition. Not sure how that could happen with a battery replacement. With that one vehicle wire cut, you can't just simply unplug and remove the CM900 controller.
While the wiring is not exactly the same, below is a diagram of the vehicle and BCM location with its necessary connectors indicated.   Use as a quick reference.
2015 GMC Terrain, Compustar CM-900AS -- posted image.
Soldering is fun!
britton0055 
Member - Posts: 3
Member spacespace
Joined: February†05, 2024
Location: Ohio, United States
Posted: February†06, 2024 at 1:11 PM / IP Logged Link to Post Post Reply Quote britton0055
Thanks for the info I will give it a try
silvercivicsir 
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Joined: November†21, 2003
Posted: February†08, 2024 at 4:45 PM / IP Logged Link to Post Post Reply Quote silvercivicsir
check the 2amp Pk3 fuse.. when you slide the key into the ignition and turn it to "ON", and with the door open, do you hear the "ding" ?

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