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Chevy Colorado and GMC Canyon Electrical Problems

250 messages,  Last post on Dec 05, 2009 at 9:32 PM

You are in the Chevrolet Colorado and GMC Canyon Forum. Your Host is kcram

What is this discussion about? Chevrolet Colorado, GMC Canyon, Electrical, Truck


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#93 of 250
Re: 2004 LS Ext Cab, Door Lock Issue [leadfoot4] by mrwebman
Sep 22, 2008 (12:31 pm)
Reply

Replying to: leadfoot4 (Sep 22, 2008 11:00 am)

Thanks leadfoot4.
 
I'm not positive but I think those relays that you are talking about might be in the switch assembly in the door panel on the Colorado. I'll remove the switch assembly tonight and disassemble it to see.
 
I'll post my finding here.
 
Cheers.
#94 of 250
Re: 2004 LS Ext Cab, Door Lock Issue [mrwebman] by leadfoot4
Sep 22, 2008 (3:26 pm)
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Replying to: mrwebman (Sep 22, 2008 12:31 pm)

I don't know if the moderators here will let this fly, but if they let this reference go, check this out....
 
http://forums.corvetteforum.com/show....php?t=1606865
#95 of 250
Re: 2004 LS Ext Cab, Door Lock Issue [leadfoot4] by kcram HOST
Sep 22, 2008 (4:32 pm)
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Replying to: leadfoot4 (Sep 22, 2008 3:26 pm)

Dead link...
 
We allow a link like this as long as it's viewable to all and directly answers someone's question. If it's just to promote another site, no good.
 
kcram - Pickups Host
#96 of 250
Re: 2004 LS Ext Cab, Door Lock Issue [leadfoot4] by mrwebman
Sep 22, 2008 (5:03 pm)
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Replying to: leadfoot4 (Sep 22, 2008 3:26 pm)

The Corvette door module looks similar to the Colorado's except that the Colorado's panel is physically attached to the door and window switches - just one assembly. Also, the relays inside are tiny and there is lots of logic on the PC board and it is almost all Surface Mount Devices (SMD). The relays look like single pole double throw relays so I checked across the closed contacts and they appear to be good. If my Hayne's manual wiring diagram is correct, the Body Control Module sends a signal to unlock the door on the white wire at the door module. When I monitor the white wire while pressing the key fob unlock button, I get a steady 4.7 volts. I would think that voltage should go up or down when the key fob button is pressed but it doesn't.
 
I pulled the connectors loose on the BCM hoping that it might 'reset' it but it had no effect.
 
I sure hate to take it to the dealer but I can't afford to just change out expensive parts on a whim and I can't find a decent schematic.
 
I tell you why the truck costs so much - there's $15,000 in wire in the thing. When you start looking behind covers and things it's amazing how much wire and how many connectors there are!
 
Cheers
#97 of 250
Re: battery light [robl6210] by dmathews3
Sep 22, 2008 (5:17 pm)
Reply

Replying to: robl6210 (Sep 22, 2008 11:16 am)

Bottom line you bought a piece of junk due to lack of checking it out according to your post so why not tell me the name of your dealer business so I can avoid doing business with you.
#98 of 250
Re: 2004 LS Ext Cab, Door Lock Issue [kcram] by leadfoot4
Sep 23, 2008 (6:24 am)
Reply

Replying to: kcram (Sep 22, 2008 4:32 pm)

"kcram", there have been some issues on that site, due to a new software package. However, the link I was referring to showed the actual circuit board for the window/lock/unlock functions, as well as identifying which relay was what.
 
It could have been helpful.....
#99 of 250
Re: 2004 LS Ext Cab, Door Lock Issue [leadfoot4] by mrwebman
Sep 23, 2008 (6:52 am)
Reply

Replying to: leadfoot4 (Sep 23, 2008 6:24 am)

The link works if you take out the dots and put in "thread." ie, /showthread.php?t=1606865.
 
For anyone that is having a problem where both your door lock button as well as your key fob doesn't work then I'd look at the relay as a probable problem. The relays on the Colorado are smaller than the ones on the Vette but they are replaceable.
 
Unfortunately, my problem was that only the key fobs wouldn't unlock the door... the switch still worked which means the relays are good.
 
When I figure my problem out I'll announce it here.
 
Cheers.
#100 of 250
Re: 2004 LS Ext Cab, Door Lock Issue [mrwebman] by leadfoot4
Sep 23, 2008 (10:55 am)
Reply

Replying to: mrwebman (Sep 23, 2008 6:52 am)

"webman", I just thought of something. Have you tried resetting the fobs to the truck?
 
To the best of my knowledge, you turn the key to the "on" position, then hold the lock and unlock buttons on the fob simultaneously for a few seconds, or something like that.
#101 of 250
Re: battery light [dmathews3] by robl6210
Sep 23, 2008 (10:59 am)
Reply

Replying to: dmathews3 (Sep 22, 2008 5:17 pm)

I purchased a $5500 unit for $1800! I think I have some room for repairs.
#102 of 250
Re: battery light [robl6210] by dmathews3
Sep 23, 2008 (11:16 am)
Reply

Replying to: robl6210 (Sep 23, 2008 10:59 am)

Not bad, let us know what you find when you get it fixed. In case it wasn't the added on equipment that caused the problem. Most likely, as you said it was but I always have believed in Murphys law.

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