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03-04-2008, 02:27 AM | #31 | |||
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Re: 4wd system operation 98up Blazers
Ok, I got a 2000 with the 4 button switch. Mine will not shift into 4hi at all and will shift into auto 4wd most of the time (sometimes it wont go in that either). Then once it's in auto 4wd and I hit the 2hi to take it out, nothing happens. But if I hit the 4hi button, the 2hi button will light up and it will go into 2hi. Sometimes it takes several attempts of pushing either the 2hi or the 4hi button for it to go into 2hi. Usually it's the 4hi button being pressed that makes it shift back into 2hi. Any ideas???
Why couldn't they have just stuck with the good old manual shift lever on the floor? Sometimes I really miss my old 85 Blazer.
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Current Rides: 1971 Nova 2004 Tracker 2013 Sonic Past Rides: 2007 G5 1984 Firebird 2000 Jimmy 1994 Jimmy 1990 Tracker 1985 Jimmy |
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06-21-2008, 10:20 PM | #32 | |
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Re: 4wd system operation 98up Blazers
I am having some of the same problems as everyone else has posted about not going into 4 hi, goes into 4 low no problem, took to dealer, they diagnosed as being encoder motor & dash switch, had a local mechanic replace encoder motor & dash switch for about $500. Drove it home & still had same problem, replaced switch located on differential for about $15, still not fixed, took battery out & examined actuator, actuator appears to be working w/ no problems & holds vacuum, vacuum switch located on firewall seems to be doing it's thing also. My big concern is that it appears that the cable is getting hung up on something & isn't able to be pulled far enough to engage, when pulled as far as it will go, it only pulls the actuator diaphram about half way down. I have tried spraying wd40 down the cable, however it appears that it is not in the cable, but something in the front diff. I am not familiar w/ how the cable connects in the diff or what exactly it does, or what it could possibly be hanging up on, & if it is, how to take it apart & fix it. I would certainly appreciate any help or advice.
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06-22-2008, 01:33 AM | #33 | |
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Re: 4wd system operation 98up Blazers
update.... turns out 4 high now works after discovering broken hose @ vacuum smitch on firewall & reconnecting it, however selector switch light still flashes in 4 high. I have already replaced switch on front diff & have disconnected the battery for over an hour to reset computer & am unsure of where to look next to solve the problem of flashing selector switch
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10-13-2008, 09:57 AM | #34 | |
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Re: 4wd system operation 98up Blazers
Here's a puzzler...
All lights on my 4wd switch are lit and will not turn off (Auto, 2HI, red Neutral led, 4hi and 4lo) and the blazer starts out very sluggishly. Service 4wd light is NOT on. The switch was replaced about 10K miles back. Any ideas? nothing in the manual refers to the lights all staying on at startup, only if they are flashing. |
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02-01-2009, 10:08 AM | #35 | ||
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Re: 4wd system operation 98up Blazers
Quote:
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08-16-2009, 09:53 PM | #36 | |
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Re: 4wd system operation 98up Blazers
I just bought a 99 Blazer yesterday.
The Lights in the 4x4 Switch are NOT lit up. The 4x4 function does NOT work. There is no noise from the Encoder/Motor at all. The Switch lights DO light up when the truck is turned on then go out after the diagnostic's test. After driving a short while, the Service 4x4 light illuminates. What do I need to do next ? |
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10-01-2009, 06:38 PM | #37 | |
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2001 jimmy 4WD problem
I have 2001 Jimmy and it has started shifting into 4WDHI on its own. It will go back into 2wd if I push the button a few times. some times I'll see it out of the corner of my eye flashing back between 2wd & 4wdhi by it self. I have a spare switch and tried my spare, but it did the same thing. I didn't notice anyone in this thread with the same problems. Any suggestion on where to start looking to fix it? Anyone else have this problem? How did you fix it?
Thanks! -Steve |
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10-01-2009, 06:55 PM | #38 | ||
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Re: 2001 jimmy 4WD problem
Quote:
Check out www.Car-Part.com for used ones. That's what I ended up doing. Also, your replacement switch very well could be BAD as well. The dash switches are incredibly flimsy and break EASILY. They are cheap enough to buy new and replace. Check out www.RockAuto.com for New switches at cheap prices. Let us know how it works out. |
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10-01-2009, 07:06 PM | #39 | |
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Re: 4wd system operation 98up Blazers
Thanks will do!
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10-01-2009, 07:34 PM | #40 | |
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Re: 4wd system operation 98up Blazers
Crap those are expensive! any chance it could be the vacuum switch on the fire wall?
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10-01-2009, 07:41 PM | #41 | |
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Re: 4wd system operation 98up Blazers
I looked on www.car-part.com and couldn't find TCCM or transfer case controll module listed any where...
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10-01-2009, 08:08 PM | #42 | ||
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Re: 4wd system operation 98up Blazers
Quote:
They are listed under Chassis Control Box(not Engine) Chevy Blazer S10/Jimmy S15/Typhoon You'll need to specify if you have a 3 button dash switch or a 4 button dash switch. |
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10-01-2009, 08:10 PM | #43 |
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Re: 4wd system operation 98up Blazers
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10-01-2009, 09:16 PM | #44 | |
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Re: 4wd system operation 98up Blazers
No the service "Service 4WD" light is not on.
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10-02-2009, 09:03 PM | #45 | |
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Re: 4wd system operation 98up Blazers
Make sure you get the new updated one if you go used. Part #12577412
Find a u pull it yard. I pick one up today for $10. Go\tta love the clunkers program for Cheap parts. Saw another clunker sitting there with the 4 button T case, but it wasn't out in the yard yet. Gonna go back and get it for a spare.
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