Try this, it is from 12volt.com, I installed a remote start in my 96 and went to the coil pack for the tach signal as is sugjested here for 99 to 02. Mine works fine but I did mot have PATS to deal with.
Ford
Windstar
1999-2002
Remote Starter Wiring Colors and Notes
Start:
DK. GREEN
IGNITION SWITCH HARNESS *
Ignition #1:
WHITE/YELLOW
IGNITION SWITCH HARNESS
Ignition #2:
BLACK
IGNITION SWITCH HARNESS
Ignition #3:
VIOLET/ORANGE
IGNITION SWITCH HANRESS **
Accessory:
BLACK/LT. GREEN
IGNITION SWITCH HARNESS
Brake Light:
RED/LT. GREEN
AT SWITCH ABOVE BRAKE PEDAL
Tach Signal:
DK. BLUE/LT. GREEN
AT COIL MODULE ***
Parking Lights:
YELLOW/LT. BLUE (-)
AT FRONT ELECTRONIC MODULE ****
OEM Alarm Disarm:
LT. BLUE/BLACK (-)
16. PIN CONN. LEFT OF STEERING COLUMN
OEM Alarm Arm:
ARMS WHENEVER THE DOORS
ARE LOCKED.
Notes:
* These Vehicles May Be Equipped With Ford's PATS Anti-Theft System. Bypassing Transponder Theft Systems. ** Use Ignition #3 to Drive a Relay and Fuse the Constant +12 Volts of the Relay Seperately at Battery With a Separate 30 Amp Fuse. *** Located Top Left Side Of The Engine
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Ford
Windstar
1999-2002
Alarm and Keyless Entry Wiring Colors and Notes
Constant +12 Volts:
RED
IGNITION SWITCH HARNESS
Starter Kill:
DK. GREEN
IGNITION SWITCH HARNESS *
Ignition +12 Volts:
WHITE/YELLOW
IGNITION SWITCH HARNESS
Dome Lights/Superv:
ORANGE/WHITE (-)
AT FRONT ELECTRONIC MODULE ****
OEM Horn:
DK. GREEN/ORANGE (-)
8 PIN CONN. LEFT OF STEERING COLUMN
Power Lock:
LT. BLUE/ORANGE (-)
16 PIN CONN. IN DRIVER'S KICK PANEL
Power Unlock:
LT. GREEN/YELLOW (-)
16 PIN CONN. IN DRIVER'S KICK PANEL
Trunk Release:
SEE NOTE *****
Alarm Input Wire:
ORANGE/WHITE (-)
AT FRONT ELECTRONIC MODULE ****
Notes:
**** Located Behind Driver Side Dash Left Of Steering Column. ***** Sliding Door Operation Tan/Lt. Blue (-) At Switch (Same Color For Driver or Passenger Side).