99 mirage remote start problems

What directed brand, part # What kind of trouble are you having? Wire location? How to wire relays?

The wires you need are behind the radio. BROWN / WHITE = Lock GREEN/ BLACK = Unlock. They are NEG(-) trigger.

wire your relays like this :

This is one of the most common type of door lock switch configurations found in most vehicles. In most cases you will not need to add relays for this type. Most of the newer alarms and keyless entries on the market today have both positive and negative 200 ma door lock outputs that are usually capable of activating the factory relays. Should you need to add relays for a "3 wire negative" door lock system, just change both normally open terminals (87) from 12V(+) to ground. If your alarm or keyless entry has positive outputs only, you will have to connect the other side of the coils to ground  and connect your outputs as shown. The lock and unlock wires below refer to the switch wires, not the motor legs.