[DML] at wits end with transmission governor computer
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[DML] at wits end with transmission governor computer



Here is the brief version: When I restored my own car #3231 3 years
ago, I refurbished and relocated the shift computer from the side of
the trans into a project box. It's worked flawlessly since then. I am
currently trying to finish up restoring #6597 for a family member. 

I tried doing the same restoration (based on hershey's computer
updates and fixes) and moving the boards to a project box. The damn
thing has been stuck in third and won't shift which is a clear
indication that power is not getting to the solenoids. 

In trying to troubleshoot, I tried moving my shift computer to the
project car and see if that solves the problem, of course it did not.
However, now my computer no longer works even in my car! My car is
stuck in third as well.

I found some hand drawn schematics on dmctalk.com and tried metering
to make sure power was getting to the boards and whatnot (also checked
the fuse in each car) but i'm not certian these schematics are
accurate. Compounding the problem, I've misplaced the wiring diagram I
drew when I relocated my own shift computer 3 years ago so It's not
really a matter of matching up the connector I made on my own car with
this one.

I need help from the community. 

First off, I think I want to start by verifying that the transmission
itself is ok and the solenoids are ok. Is there a particular set of
wires I can just send 12 volts down to activate the solenoids directly
to see if it will shift? I know power to both solenoids is first, drop
 the first solenoid is 2nd and no power is 3rd. The cables from the
shift computer don't seem to go directly to the solenoids. The go to a
big old connector on the firewall first. What is inside that block?
resistors? relays?

Assuming I can do that and verify shift functionality, is there a
decent color wiring diagram or schematic so I can see exactly how the
whole circuit works and hopefully put the computer on a bench and test
with a meter. I can see that there are 2 wires (red and gray) that
supply 12 volts. There is a peach colored wire, 2 wires that appear
white, a black, which I believe to be ground, a blue one, and a green
one. 

Not too long ago someone posted a video where they had the whole thing
on a bench and was able to show the solenoids moving. Maybe this
person drew a diagram?

Sorry for making this so long, I am just frustrated and hope I don't
have two fried computers on my hands. 

Sean
#3231
#6597



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