I have no communications on my 1999 C70. I've studied up on how to diagnose a CAN bus, but I just learned this vehicle isn't CAN. Where can I learn how this car communicates between controllers?

That make total sense, I wish I’d understood this insight a month ago.
Thant you

I know my 1999 C70 has no AC high port, and the use of an adapter on the high pressure sensor has been recommended. But, no one said how to use the adapter on a fully charged system. When I loosen the pressure switch/sensor connector, refrigerant escapes.

Thank you Klausc, with you insight I was able to identify the problem cable. The hand-level on the side of the seat rotates a plate the pulls on a cable. This cable goes up then makes a 180 degree loop back down to the lever that releases the seatback. My cable had frayed and broken. Now I'm on the ...

Thank you. I'll check those out and let you know.
-Ed

Does anyone have tips on how to remove seat upholstery?

Thanks Neil,

When the seat is tilted forward, I do have to lift on the latch to return it upright.

I've opened the upholstery from the bottom of the seat-back and am able to see into the latch area. It does rely on a cable, I just can see what isn't working without taking the leather off the seat ...

The passenger seat-back, in my 99 C70 Convertible, is stuck in the folded forward position. This is the position needed for a rear-seat passenger to get in or out of the car.

The seat lever that you pull up on to allow the seat-back to pivot was finicky for a few months, but now it doesn't work at ...

Two weeks ago I removed the radiator, intercooler, intake manifold, and PCV system. Last weekend installed a new PCV system, cleaned the throttle body, intake manifold, and engine. Today, after work, I started reinstalling; the radiator and intercooler are bolted in. Tomorrow, start connecting the ...