In fact, it sounds like the process is examining the neutral swap and may only actuate in neutral. 4Lo is imagined to run in this manner, but 4Hi should really switch on the fly.
The one dilemma you should have is as you have two wires disconnected, you need to know which one goes to which gap (terminal). When you explain to me the colors, I can try to Identify them to suit your needs (be certain with wire shades — ie. white with mild environmentally friendly stripe, pink with dark blue stripe, etc.).
I am enormously indebted for you. My new spouse’s 2000 Blazer misplaced her 4wd a 12 months in the past. SHe located your Internet site regarding the TCCM module corrosion, printed off the knowledge and her mechanic fastened it. He was also amazed.
I understand I’ve likely just rambled on and advised you almost nothing — very well, that was only my imagined approach when attempting to discover a difficulty. I can only hope it assisted. Let me know how you make out. If I think about anything else, I'll update this post.
One other wire I'd Examine will be the A/T (Automated Transmission) change lock change — This really is wire #31 and it is mild eco-friendly using a black stripe (you will discover more web pages of the schematics over… the first is usually a hand -written website page of your TCCM connector pinout). This wire should have voltage applied to it at specified instances — regrettably, I have not had to diagnose that Section of the procedure, so I don’t know if it ought to be +5VDC or +12VDC (but It'll be one of these!
With any luck ,, this may established you off in the appropriate direction. Please let me know what you discover as it might be of use to another person below Later on.
PS – the flashing change lights suggest the technique is trying to talk to the rest of the method. When it stops, this means it could not communicate with Component of the system.
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The primary trouble it is possible to check by yourself. Grab the schematics from the first article and take a look at pins 26 via 29 for logic electric power (+5VDC), working with pin 16 as your floor. You might also need to get beneath the car and test precisely the same wires in the encoder motor. Test the ground wire Try THESE Guys Out there at the same time.
When it stopped Functioning, I went exploring… first behind the glove box, but I could clearly see that the only real relay (the things which make that “click – click†seem) there was for that alerts (turning around the hazard lights verified this when you can Evidently hear the relay, not to mention truly feel the press if you place your hand on it).
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I’ve nonetheless acquired to acquire some schematics posted for another visitor poster over — with any luck , I'll remember to accomplish that now. Regards;
I don’t want to give you undesirable information, but I'd suspect the latter given that the lights will often flash although the method is attempting to have interaction 4WD, even when it doesn’t interact, the lights flash though it’s striving. In the event the lights don’t flash, that tells me which the process isn’t even trying to interact 4WD — and that’s managed by the TCCM.