Question about 1994 Chevrolet Silverado 2500

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The 4x4 keeps blowing the ATC fuse. I have a 1999 ZR2 Blazer

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

alicantecoli
  • 22156 Answers

SOURCE: Chevy silverado keeps blowing fuses

sounds like a mouse has got in and chewed the cables,their is no easy fix from what i can think of but check all the wires and connections in case water has got into it,or snow if your in alaska.its fifteen years old now so its possible that some insulation has broken down or a wiring loom has chaffed somewhere underneath

Posted on Feb 04, 2009

  • 165 Answers

SOURCE: #14 fuse on 1999 jetta keeps blowing. replace and it starts again

there is a short somewhere in the wiring

Posted on Jul 20, 2009

  • 312 Answers

SOURCE: keep getting code p0785. 1999 blazer 4x4

Depends on how handy you are. You'll need to drop the tranny pan and you'll see them all in the valve body. If you're going to go through the effort you might as well change all of them at the same time.

Here's a diagram:

http://z.about.com/d/autorepair/1/0/p/D/78407452.gif

Posted on Oct 08, 2009

  • 1810 Answers

SOURCE: i have a 1999 kia sportage 4x4. the 40 amp fuse in

sounds like theres a wire rubing against the exhaust and is now shortin out the fuse

Posted on Jan 17, 2010

  • 108 Answers

SOURCE: 1997 chevy Blazer ZR2 4x4 not engaging

Fab only gave part of an answer. Check the vacuum lines on the driverside firewall. Also check your heater/AC unit make sure the air deflector will change from defrost to vent. If it stays on defrost no matter where you put the knob then you have a disconnected or leaking vacuum line to the dash. If that works and you don't see any open hoses then remove the battery and battery tray. You'll find the actuator there. Remove the vaccum line that goes to it, connect the battery or jumper cables so that you can start the engine. Put it in 4HI and feel for a vacuum at the line. If you do then put it on the actuator and see if it pulls on the cable. If there is no vacuum at that line then the switch at the transfer is bad and isn't sending vacuum to the actuator. If you do have vacuum and the cable didn't pull then change the actuator.

Posted on Apr 25, 2010

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Check the ATC fuse in the engine compartiment . Should be a 20A. Pretty shure it is burnt!!

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What you have done? You Just damage the TCCM and that's why you will not manage to shift 4x4. Why this happened? Because you had shortage somewhere and you receive blown ATC fuse.You put a bigger fuse in capacity where the was stronger to blown and the fault moved to the tccm system which was not protected and blown.Ask for an expert to check and see whether the fault is easy to get fixed.

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I have a 1999 blazer zr2 with the 4.3 vortec OK now hears the problem to day when i was driveing in the snow i had to use the 4wd so i stopped and hit the 4wd button and it clicked and sounded like it...


Sound crazy, but alot recommendations say thet when you pass from Hi to Lo must insure that you have foot on the brake pedal.

Loss of vacuum engages the front hubs; other for no 4 wheel drive and no indicator light. Go home pulled all the fuses that had to do with the 4 wheel drive system, put them back in and 4 wheel seems to work fine now. And no there were no blown fuses.

I recently had same case and it was a bad electric motor on the transfer case (31000 miles). The 4x4 light wouldn't even light up or engage so I would lean towards it being something different on your end.
Also, could be the actuator pin or w/e the little plastic piece is that engages the 4LO might be broke, or maybe a couple of other things.

Keep us updated.


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What would make the atc fuse blow in a 1999 chevy blazer?


jai un blazer 2001 avec un probleme de fuse qui saute seule du atc elle saute sur la route lorsque le 4x4 es engager apres quelque minute de route jai changer lencoder le module atc tout verifier le filage a l'oiel et jai rien trouver quelquun peu maidee svp

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Shifting into 4wd


pull out your courtesy lamp and ATC fuses for 1 minute then reinstall then cycle key on and off 5 times this will reset the 4x4 computer and should fix your problem. and for that question by boscia they do not have locking hubs manual or automatic.

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