93 Pathfinder in limp-mode

[Jacklalanne]

I have a 93 Pathfinder 4WD SE-V6 that is stuck in fail-safe (limp home) mode. I have done all the self-diagnostics outlined in the AT factory service manual. At the end of the process the "Power" light is supposed to blink out a series of codes. I get nothing. Utilizing the rest of the troubleshooting processes in the FSM I have narrowed the issue down to the "revolution sensor".
I tested for revolution sensor pin voltage on the TCM while driving down the road and get 0V at the pins (pins 15-16...16 is ground), rather than the 1V at 19 mph that then rises gradually with an increase in speed (I checked rest of the voltages on the TCM and all other 34 pins are reading correct voltages).
Before I buy a new sensor though I want to make sure it is bad and that I don't just have a bad/broken electrical connection between the sensor and the underhood connector at the other end. The FSM provides an ohm reading (500-650 ohms between terminals 1 and 2) that should be obtained at the under-hood end of the sensor connector if the sensor is good. I have physically traced the wire from the sensor itself to where it disappears up the inside of the firewall next to the A/T dipstick, but for the life of me I can't pick it back up again when looking from under the hood (and believe me, I have spent enough time physically crawling up under the hood trying to find it). Does anyone know where I can find a diagram that would show the location of the connector on the other end of the sensor wire (under the hood) so that I can check it for proper tolerances and then replace it if necessary? I'm really stuck (and frustrated) on this one.
Thanks in advance for any advice and help you can provide.
Regards,
Russ