98 gmc jimmy 4x4 problems?

jfarcticman · #1 11-16-2006, 11:49 PM

I have a 1998 gmc jimmy 4x4 4dr that i bought from my parents for 2000 dollars with just 75000 miles on it and because she didnt use the 4wd much it stopped working. Well i tried to fix it and get it to work but only got it to go into 4lo then when i got it to go into 4hi it blew fuses so i read on the net and replaced the actuator under the battery tray. Still blows fuses so we bring the electronic transfer case motor to a friend of ours and he sed there was deff sumtthing rong with it so we then bought a new motor. Well then after we installed it i jumped in and cycled through 2hi and 4hi for a lil then tok it out into the farm roads behind my house. Then when i was coming back to just put it back into 2 hi to go on the road my lights in my dash to indicate the 4wd went out and lukily i was 2 seconds from home i drove it. Well i got the thing back into 2 hi after blowing fuses and then replaced that switch thinking it was that but now the 2 hi light comes on when it wants tooo can some one help me?

MouseMotor · #2 11-26-2006, 09:34 PM

one of the 2 4x4 motor gismo's are burnt out. try the front diff one first. as a test, disconnect it. if the fuse does not blow, you found your problem. when they go bad, they do short killing the fuse.

jfarcticman · #3 11-27-2006, 08:09 PM

alright ill give that a try and where is the other one located?

MouseMotor · #4 11-27-2006, 09:51 PM

the one should be on the front of your diff. it is a black gismo kind of tube shaped.

the other is on the rear of the t case, just about in the middle. or at least i think that is where they are on small blazers.

jfarcticman · #5 11-28-2006, 07:25 AM

ok man thanks ill check that out tom. night cuz i gotta work tonite

Hanr3 · #6 11-28-2006, 09:10 PM

The S10-blazer are set up a little different then the fullsize trucks. There is only one electric actualtor, and it is on the t-case. Look for it next to teh front driveshaft.

The front axle is cable actuated. A vacum runs from teh t-cae to the thing you replaced under the battery tray. The vacuum pulls the cable, which in turn engages the front axle. Like $250 for that actuator on the t-case.

I would check just about everything else before I replaced that actuator. Make sure the switches are good, vacuum lines are good, etc.

jfarcticman · #7 11-28-2006, 09:44 PM

what actuator are u talking about i know the electronic shift motor that is on the transfer case then theres a switch thing on the front diff but wut do u mean? and its blowing fuses??Also it doesnt indicate the 2hi all the time either like the light doesnt glow only when it wants too

MouseMotor · #8 11-30-2006, 06:15 PM

when those pull motors go bad, they sometimes short out. that is why you are blowing fuses.

MouseMotor · #9 11-30-2006, 06:17 PM

when those pull motors go bad, they sometimes short out. that is why you are blowing fuses.

jfarcticman · #10 11-30-2006, 10:15 PM

heres the thing man we just replaced the shift motor with a brand new one and it worked and everything and even with the old one the lights still lit up and stuff just didnt go into to 4hi and such but i think theres gotta be a short somewhere else cuz not just that shows the 4wd b/c isnt there a switch on the front differential thats called 4wd indicator lamp switch or sumthing?