https://www.brickboard.com/RWD/volvo/1646531/940/960/980/V90/S90/new_post_car_dies_kill_switch_style.html

"It turned out to be a loose cable at the battery."

I guess when doing this stuff, helping people through remote control in forums like this, one should not ever presume the basics such as battery cables at the battery posts are secure and corrosion free.

I think I said something about the checking charging system.

Sometimes I believe I'm so stupid about this stuff sometimes.

I guess a little more glamorous then removing rusty exhaust systems in the mid-1980s from very early 240s and later 140s and the rare 160 and Amazon. (So loved working on those cars then, yet it was work.) I want to unbolt it, yet this is rusty rust belt St. Louis MO. The shop owner wants me to cut it out, yet you still have to unbolt it, and we argue the point.

Rather let a day or two or penetrant, use acetylene torch, what scared the karp out of me on determined hardware, pull the rusty exhaust out, and discard it.

Rusty and filthy work.
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Awesome! I think you can edit the title and main post to say "RESOLVED" just in case someone comes here with the same problem, you might just make their day!

hello spook. After some time I concluded the same thing so I looked some place else and thought about the ignition switch too. It turned out to be a loose cable at the battery. Even it seemed everything was very tight when moving the main harness a smaller wire on the other side was loose. By starting the car and moving this loose wire the engine die and I could noticed lost power to the lights for a split second, but could not duplicate the entire lost power. Go figure the cable got just on the right non-contact spot while driving and stayed there like a phantom

Dear Spook,

Regarding the position of the crank sensor, I think the purpose it is wedged in such tight space between the back of the engine and firewall is that if severe frontal collision occurs, the entire engine + trans bell housing will be pushed back BREAKING the sensor thus effectively stopping the engine.

This tight space placement has been a bane for servicing purposes (this more so for the 200 series) whereas it is there for safety. I salute those Volvo engineers.

Regards,
Amarin.