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2003 gmc envoy_slt_xl
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9 Posts
Discussion Starter · #1 ·
i am in desperate need of help. it all started with the heated seats not working and i come to find that a metal bracket on the seat had broken and picked a wire. By this time the power seats did not work. i then checked the fuse box under the back seat and found the mini circuit breaker was extremely hot and was a different color than the other ones. i assumed it was bad. i took the seat our, welded the bracket that was broke, got a new mini circuit breaker, and put the seat back in.

Now i have no radio or anything on the main console. no power seats still. i went through all the fuses and nothing. i am at a total loss. i dont have a ton of money right now, and need to get my car fixed soon. please help me out.
 

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2003 gmc envoy_slt_xl
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9 Posts
Discussion Starter · #2 ·
by the way

the envoy starts and runs fine. all the problems seem to be in the elctrical under the seat and maybe in teh fuse box under the back seat. just my thoughts

please and thank you for any help you can give me.

jeff
 

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2006 chevy trailblazer_ls
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314 Posts
not sure on ur prob but if he is correct about the mega fuse giving no power to the rear fuse box check if your locks and parking lights work if those dont work then your box isnt getting power sorry i cant be more help but make sure you dont have any loose or damaged wires anywhere
 

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2003 gmc envoy_slt_xl
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9 Posts
Discussion Starter · #8 ·
mega fuse

I got where it is at, and am going to get a new one today. another part of this question is what all is controled in the rear fuse box?

you guys have been a great help, thank you all.
 

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2004 gmc
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26,436 Posts
The megafuse is opaque black plastic, so you can only confirm it's bad using a meter. Either with the power off using the continuity mode, or with the power on checking voltage at either end of the fuse. If they're different voltages, then the fuse is open.

Here's the definitive post on what's run by the megafuse:

http://forums.trailvoy.com/showpost.php?p=672328&postcount=26

A summary of rear fuse panel loads that come only through the 6 AWG feed wire:

Liftgate module (solenoid for rear glass and hatch)
Seat memory module
Overhead console - garage door opener / voice recorder
Onstar
Radio
XM
HVAC control module
Sunroof
Aux power outlets
Rear Blower motor (LWB)
Interior lights via BCM (courtesy and reading lamps)
Dimmable lamps (gauges, radio, switches)
Seat motors
Door locks and window motors
Parking lamps
Rear wiper
Backup lamps
 

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2003 gmc envoy_slt_xl
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9 Posts
Discussion Starter · #10 ·
thanks

Roadie, you are the man. i apprecite all the help, this if very informative and a huge help. With now knowing the items that are controlled in the fuse box, i am fairly confidant that i blew the mega fuse, but we will see later today.

Thanks
 
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