Anyone ever seen this issue before?
Thread Starter
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Beginning Member
Joined: Jul 2011
Posts: 43
the following vids are some of the electrical issues i have in my 2000 blazer. it does it now randomly without the radio having to be turned up. my mechanic said it may be my BCM...anyone have any clue??? NOTE: PLEASE EXCUSE THE LANGUAGE AND STRONG CONTENT OF THE MUSIC IN THE VIDEO...its all i had 
Electrical issues - YouTube
Electrical issues - YouTube
also it does it randomly just riding down the road. i uninstalled my system and it still does it. especially when i put my windows all the way up...
Electrical issues - YouTube
Electrical issues - YouTube
also it does it randomly just riding down the road. i uninstalled my system and it still does it. especially when i put my windows all the way up...
Last edited by TripleBlackBlazer; Dec 18, 2011 at 03:01 AM. Reason: Merging consecutive posts-Please use the 'Edit' feature to add more info to your last post if no one has replied
BF Veteran
Joined: Feb 2007
Posts: 3,335
What happens when you first put the key in and turn it on without starting?
It almost looks like you have a loose connection at the battery and the truck thinks it's turning back on even though it's already on. I would start by taking the terminals off and inspecting/cleaning them real well before reinstalling and making sure they're tight. Check any grounds you may have for your stereo install. Make sure they're in a good location and you sanded/scraped the area down to bare metal before grounding to that spot.
Electrical problems are a nuisance. Your ignition switch could also be going bad or is bad. There are a lot of systems that are powered up through your ignition switch. It's not a Blazer but I just replaced the ignition switch in my Wife's Regal because when you would use the blinkers the entire dash would light up similar to yours and the needles would jump around like they were on speed.
It almost looks like you have a loose connection at the battery and the truck thinks it's turning back on even though it's already on. I would start by taking the terminals off and inspecting/cleaning them real well before reinstalling and making sure they're tight. Check any grounds you may have for your stereo install. Make sure they're in a good location and you sanded/scraped the area down to bare metal before grounding to that spot.
Electrical problems are a nuisance. Your ignition switch could also be going bad or is bad. There are a lot of systems that are powered up through your ignition switch. It's not a Blazer but I just replaced the ignition switch in my Wife's Regal because when you would use the blinkers the entire dash would light up similar to yours and the needles would jump around like they were on speed.
Thread Starter
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Beginning Member
Joined: Jul 2011
Posts: 43
What happens when you first put the key in and turn it on without starting?
It almost looks like you have a loose connection at the battery and the truck thinks it's turning back on even though it's already on. I would start by taking the terminals off and inspecting/cleaning them real well before reinstalling and making sure they're tight. Check any grounds you may have for your stereo install. Make sure they're in a good location and you sanded/scraped the area down to bare metal before grounding to that spot.
Electrical problems are a nuisance. Your ignition switch could also be going bad or is bad. There are a lot of systems that are powered up through your ignition switch. It's not a Blazer but I just replaced the ignition switch in my Wife's Regal because when you would use the blinkers the entire dash would light up similar to yours and the needles would jump around like they were on speed.
It almost looks like you have a loose connection at the battery and the truck thinks it's turning back on even though it's already on. I would start by taking the terminals off and inspecting/cleaning them real well before reinstalling and making sure they're tight. Check any grounds you may have for your stereo install. Make sure they're in a good location and you sanded/scraped the area down to bare metal before grounding to that spot.
Electrical problems are a nuisance. Your ignition switch could also be going bad or is bad. There are a lot of systems that are powered up through your ignition switch. It's not a Blazer but I just replaced the ignition switch in my Wife's Regal because when you would use the blinkers the entire dash would light up similar to yours and the needles would jump around like they were on speed.
I would test the ignition switch before jumping into the BCM. The ignition switch controls power to everything in the truck. If one of the contacts in gets burnt/corroded, it can cause all sorts of weird things to happen.
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Beginning Member
Joined: Jul 2011
Posts: 43
loc = loss of communication
Last edited by swartlkk; Dec 27, 2011 at 04:55 PM. Reason: *Combining Consecutive Posts* - Please use the edit function to add additional information in your post if another member has yet to respond.