31256240 - I believe this is 300427 for -98 P80 turbo OUTER CV boot 31256230 - I believe this is 300420 for -98 P80 turbo INNER CV boot - this I am not sure about as I am struggling to find cross references for this. I can't find a 6 digit Volvo part number for this for cross reference. Can any one...

So the secondary locking device is missing from the receptacle? AMP part number in your picture is 4-965101-1, I guess if you look at the other side of the housing it should be Volvo part number 3545976? Just replace the receptacle housing...

Torque converter lockup will never be engaged in 1st gear, so it's not responsible for jerky starts.

TCM is innocent until proven guilty. Car off, parking brake set, TCM removed, measure ohms from ECU box TCM connector pin A20 to each of pins A3, A4, A5, A6 in every gear selector position.

Just to make sure I have this right, I'm looking down into the ECU and TCU housing and I hook up my multimeter like so and test continuity on pins A3 (jn P, R,N, D, 3, L), A4 (jn P, R,N, D, 3, L), A5 (jn P, R,N, D, 3, L) and A6 (jn P, R,N, D, 3, L)? Yes, that's right. If you look at the chart in th...

Just to make sure I have this right, I'm looking down into the ECU and TCU housing and I hook up my multimeter like so and test continuity on pins A3 (jn P, R,N, D, 3, L), A4 (jn P, R,N, D, 3, L), A5 (jn P, R,N, D, 3, L) and A6 (jn P, R,N, D, 3, L)? Yes, that's right. If you look at the chart in th...

OK! So the switch contacts for C, PA, 50S and BL are good, but A and B are open circuit. Also, the wiring between the ECU box and the transmission is OK. You need to replace the switch or redo the repair. No need to measure across the blue line. Now that we know A20 to A5/A6 are OK, we know the grou...

Another note. My guess would be that inside the switch, the innermost trace (closest to the circular hole) is ground, the next is PA, then A, then B; and the outermost two traces are shared between C, 50S and BL; and there is an electrical connection between the innermost two copper brushes at the w...

Spotted on the Internet...