'86 4kq diff locks/Propshaft

[Dobromir Rizov]

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Hello Everybody,

After I replaced my propshaft my car is back on the road. Even I have a spare ECU now to replace the one on the car that maintains DPR current steady at 17.7 mA.

Many thanks to everybody who responded with advices and info!

Now, being on a mood for repairs I plan to restore the locking functions of the center diff.

Recently I've red some info about all-wheel systems and it's obvious to me that diff locks must be  fully functional .

Rear diff engages o.k.

With center diff lock swithch on  there is no light or movement.

I lost the ability of my power locks as well.

The vacuum pump (trunk, right-hand side) is not working. Obviously the pump is not the source of vacuum for diff locks if rear diff lock is working.

What is the way to test, repair or replace?

Can somebody send me vacuum diagrams, electro diagrams?

How diff locks look like?

If a lock gets broken could it damage the transmission?

 And any pictures that would help of describing hoses, actuators, location of involved components, etc. will be much appreciated!

Thx,

Dobby

86 4qk