Okay, here's what I've been able to find:
Connector C206 (Gray):
Pin 2: Ground for Brake Indicator - Pnk/Wht
Pin 3: to RABS Module - Dk Grn
Pin 4: Ground for Low Range Indicator - Lt Blu/Blk
Pin 6: Ground for Low Oil Level Indicator - Gry
Pin 12: Panel Illumination - Lt Blu/Red
Pin 13: High Beam Indicator - Lt Grn/Blk
Pin 14: Ground - Blk
Unspecified Pin #:
Power for Resistive Gauges - Blk/Lt Grn
Connector C207 (Green):
Pin 5: Ground for Check Engine Indicator - Yel/Blk
Pin 6: Ammeter - Battery Side (cluster without Tach) - Red/Org
Pin 6 Alternate: Ground for Oil Pressure Indicator (cluster with Tach) - Wht/Red
Pin 9: Ammeter - Load Side - Yel/Lt Grn
Pin 11: Power for switched-ground indicators - Red/Yel
Pin 14: Ground for 4WD Indicator - Lt Blu
Pin 16: Fasten Seat Belts Indicator Dk Grn/Lt Grn
Pin 17: LH Turn Indicator - Lt Grn/Wht
Unspecified Pin #:
Resistive Sensor for Fuel Gauge - Yel/Wht
Resistive Sensor for Coolant Temp Gauge - Red/Wht
Resistive Sensor for Oil Pressure Gauge (cluster without Tach) - Wht/Red
Alternator Warning Light - Alternator Side - Lt Grn/Red
Alternator Warning Light - Ignition Switch Side - Red/Lt Grn
RH Turn Indicator - Wht/Lt Blu
Couldn't find any conclusive info:
Tachometer - possibly a Dk Grn/Yel wire
Sorry, I couldn't find a single diagram that shows the tachometer. I guess you can find it by process of elimination, if all the other wires are identified above.
Good luck.
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