Question about 2004 Chevrolet TrailBlazer

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The same problem

Hey buddy, just night my finance tried to jump her Trailblazer the same way, hooking to the fuse box. Over half the electrically items in the back fuse box on DON'T work. Did you ever get solution???

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I had same issue "jumped" the fuse box. For the moment I have replaced the 125amp fuse with a 175 amp until I can get a 125amp replacement. This also confirmed for me that this is the fix too!

I could not find the part locally, but I did find it online at Advanced Auto > http://shop.advanceautoparts.com/ProductDetail.aspx?MfrCode=LIT&MfrPartNumber=MEG125&PartType=669&PTSet=A

Also found another blog with same issue and a photo to help you with identifying the 125amp fuse for the non-technical folks > http://forums.trailvoy.com/showthread.php?t=49965

Posted on Jan 18, 2009

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125 amp fuse

Posted on Sep 02, 2008

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1 Answer

What are the red and yellow wires for?


Hey Bob, how's it going ? The two big ones there with the 125 amp fuse or breaker , they go to the rear fuse block ,that's power supply ! power supply for trailer hook-up comes from rear fuse box. The other wire supply's the body control module ! 42 TR PARK Fuse 10A Trailer Connector .
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2005 chevy trailblazer was jump started and now all interior electricals from lights to windows to door locks are gone. Any ideas beyond fuses as I checked all of those mini fuses


This is a fairly common problem on Trailblazers. What happens most often is, when jump started, instead of connecting the jumper cables to the battery, they get connected to the studs on the main fuse box under the hood. When this happens, it blows the megafuse in the fuse box.
The megafuse feeds electrical current to most of the circuits in the rear fuse box. If that megafuse is blown, it will have to be replaced, and this should fix your problem. Here is a picture I found on the 'net of the megafuse:
10act_0.jpg

Hope this helps!!

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My son was trying to jump the battery and had the cables attached to the fuse box wires and now none of the electrical components function, including the key fob, windows, radio,rear wiper,rear tail...


Sounds like he may have blown out all your main bus fuses and or relays.

Check and replace, sorry thats the best I got, this can be very tricky.

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I changed the battery in my 2002 Chevy Trailblazer last night. Car starts and runs fine, but the majority of the interior electric components are not working. I changed out the battery relay in the fuse...


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Sep 30, 2009 | 2002 Chevrolet TrailBlazer

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what do you mean with "jumped" the fuse box??

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what engine ?
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Electrical Problem for a 2004 Chevy Trailblazer


Hey everyone with this problem! Theres a fuse under the hood in the front of the fuse box. Its black and its not in the bow itself but under the cover though! two nuts hold it in place where your cable line comes in from the battery. The fuse costs $15.00 avg. most anyplace! Easy to change and everything will work inside your vehicle! Without it the vehicle will start and run but you will have no functions on the interior, or dash!

Terry

Jun 20, 2008 | 2004 Chevrolet TrailBlazer

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