After-market Key-less entry????

I am in the process of installing an after-market alarm system with key-less entry. All i have left is the key-less part. Can anybody tell me what circuitry a 1999 XJ classic uses for the door locks. I know what wires I need and where to find them but I don't know what type of circuit it uses (- switching,
+ switching, reverse polarity, one wire - multiplex, or one wire + multiplex)

Maybe somebody here has already installed one before I start ringing wires.

Thanks
Bob

reverse polarity.


I used a bank of relays that I purchased from a local circuit city, But you may not need them.

12 VOLTS CONSTANT PNK/BLK or RED IGNITION SWITCH HARNESS
IGNITION 1 BLU IGNITION SWITCH HARNESS
IGNITION 2 N/A IGNITION SWITCH HARNESS
IGNITION 3 N/A N/A
ACCESSORY/HEATER BLOWER 1 BLK/ORG IGNITION SWITCH HARNESS
ACCESSORY/HEATER BLOWER 2 N/A
STARTER YEL IGNITION SWITCH HARNESS
PARKING LIGHTS BLK/YEL (+) AT SWITCH
DOMELIGHT YEL (-) COURT. LIGHT UNDER DASH
PWR DOOR LOCK ORG/VIO (-) DR KICK PANEL
PWR DOOR UNLOCK PNK/VIO (-) NEG TRIGGER (TYPE B)
TRUNK RELEASE PNK/BLK (+) DR KICK REAR BODY HARNESS
TACH SENSOR GRY COIL
BRAKE WHT/TAN (+) AT SWITCH ABOVE BRAKE
HORN BLK/RED (-) AT STEERING COLUMN
FACTORY DISARM VIO/YEL DR KICK PANEL

they are negative switch... show it ground.....