01 isuzu rodeo, bypass factory alarm?

To disarm the factory alarm you pulse this wire with the aftermarket keyless entry. You use the wire coming off your keyless entry that say factory disarm.  If you don't have that wire, you need to split your unlock wire with 2 diodes(band facing module).  1 wire goes to your unlock wire the other goes to the disarm wire.  Usually you will test this wire by turning the key in the drivers door.  when you turn the key to unlock you will get a negative signal on that wire. 

Frank

the k9 should have a factory alarm disarm output. If not, use the unlock output and connect that to your factory disarm.

you will diode isolate the wires to prevent backfeed on any wires.

85 - constant 12v

put the diode inline with each wire (cathode) towards relay