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Here is a link to the original thread:
http://www.brickboard.com/RWD/volvo/1416049/220/240/260/280/1982_start_suspect_hall_sensor_3wire.html
I finally got it started! Thanks all! Here is the recap of the process, that I posted in my blog:
The first thing that I did was go to the Brickboard and did a search. I came up with several threads on the subject. Many of the threads cross-referenced each other, and while sometimes confusing, they were my first best source of information to use to begin working.
Below is the primary thread I used:
http://www.brickboard.com/RWD/index.htm?id=1297768&show_all=1
At some point in the list referenced in the link above, I had tentatively identified the problem as being in the Hall Sensor itself, in the distributor. At this point I was beginning to feel that I was in over my head, and that somehow I might have damaged an electrical component via the testing and would not know about it. Off to Pete's with Olga.
Cutting to the Chase:
The Hall Sensor was bad.
The ECU was also bad.
The three ECU's from the IPD Garage Sale were either bad to start with, or suffered the same possible damage from the misconnected tach lead. (see below)
While re-installing the dashboard after the windshield wiper mechanism replacement, I inadvertently connected the red-white wire to the light switch instead of to the electric tachometer. This may have caused a jolt of excess juice into the ECU and damaged it. Pete found and corrected this (advertently!).
A rebuilt ECU was received from AUTOECMS.com in PA.
It was installed and worked intermittently. One or more of the three post (3,5, or 9) was loose. (This problem was previously addressed in the referenced thread above.)
Pete bent or crimped the appropriate post(s) so that positive contact was made and Olga is running!
In the meantime, I had ordered #100 roll pins @ .07 each, in the proper size to use as $12.00 sleeves on the pins if needed. They had not yet arrived when Pete did the crimp fix. If I have the same problem again, I have the sleeves. I will make them available to Brickboarders for .07 apiece and whatever a first class stamp costs.
Having two of the "electronic links" broken at the same time, made diagnosis particularly lengthy and difficult.
Many thanks to Pete for his tenacity and perseverance, and for making his efforts affordable!
Many thanks to Brickboarder Mario for all his information and help along the way.
A person learns by his mistakes. I sure have learned a lot recently!
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