Some very minor updates. I used the (-) Parking Light wire instead of the (+) Parking Light wire you listed. It's possible the Tach can be found in the OBD2 plug, just test that Black wire to be sure. Check the jumper for IGN2 to ensure it's set for IGN.
CM900-s to 1997 4Runner
CN1
Pin 1 Red - Constant 12V.....................................WHITE (+) @ IGNITION SWITCH HARNESS
Pin 2 Green/White - Programmable Output.........Not Used
Pin 3 Red/White - Constant 12V..........................WHITE/RED (+) @ IGNITION SWITCH HARNESS
Pin 4 White - Accessory 12V positive (+)..............BLUE/RED (+) @ IGNITION SWITCH HARNESS
Pin 5 Blue - Programmable Output..set to IGN2..BLACK/YELLOW (+) or BLACK/RED (+) @ IGNITION SWITCH HARNESS
Pin 6 Yellow - Starter 12V positive (+)...................BLACK (+) @ IGNITION SWITCH HARNESS
Pin 7 Green - Ignition 12V positive (+)...................BLACK/YELLOW (+) @ IGNITION SWITCH HARNESS
Pin 8 Black - Ground negative (-) input..................Chassis Ground
CN3
Pin 1 Green/White - (fixed) Parking light 250mA (-) output..................RED/WHITE (-) @ STEERING COLUMN HARNESS
Pin 2 Blue/Lt. Green - [POC 2] Lock 250mA, 800mS (-) output...........RED/WHITE (TYPE B) @ 10-PIN PLUG, LEFT OF FUSEBOX
Pin 3 Blue - [POC 3] Unlock 250mA, 800mS (-) output........................RED/YELLOW (TYPE B) @ 10-PIN PLUG, LEFT OF FUSEBOX
Pin 4 Black - [POC 4] (GWR) 250mA latched negative (-) output.............................Not Used
Pin 5 Orange - [POC 5] Factory Alarm Arm 250mA, 800mS (-) output....................Not Used
Pin 6 Orange/White - [POC 6] Factory Alarm Disarm 250mA, 800mS (-) output....Not Used
Pin 7 White - [POC 7] Horn\ 250mA (-) output...........................................................GREEN/RED (-) @ STEERING COLUMN HARNESS
Pin 8 Gray/Black - Hood Pin negative (-) (default setting) input..................................Kit supplied hood pin
Pin 9 Light Blue/White - Brake 12V positive (+) input........................GREEN/WHITE (+) @ SWITCH ABOVE BRAKE PEDAL
Pin 10 RED/White - Trigger start (-) input..........................................Not Used
Pin 11 RED - Positive Trigger (+) input...............................................Not Used
Pin 12 Yellow/Black - Engine sensing input (A/C)...............................BLACK (AC) @ IGNITOR or DIAGNOSTIC PLUG
Soldering is fun!