There are several ways of doing this, below is a pdf that covers four of them. It is pretty apparent how each variation works and using different switches etc shouldn't be difficult to figure out.
I personally prefer to use relays, but any 10 amp rated switch should work if you are not using relays.
If you use the ground method you are activating the factory relays, if you use the positive method you are bypassing the factory relays and switching the locker directly.
Make sure you use the correct size wire and fuses. Both factory relays have a single 20 amp fuse, so expect no more than 10 amps per circuit.
When using these bypasses a flashing locker light indicates the locker is locked and no light indicates unlocked. The dash locker lights flash as the locker sensors will signal that the locker is engaged, and the computer is not expecting to see that.
As far as I can tell no codes are thrown when bypassing the lockers this way.
http://www.trailduty.com/temp/lockers/lockers.pdf
I personally prefer to use relays, but any 10 amp rated switch should work if you are not using relays.
If you use the ground method you are activating the factory relays, if you use the positive method you are bypassing the factory relays and switching the locker directly.
Make sure you use the correct size wire and fuses. Both factory relays have a single 20 amp fuse, so expect no more than 10 amps per circuit.
When using these bypasses a flashing locker light indicates the locker is locked and no light indicates unlocked. The dash locker lights flash as the locker sensors will signal that the locker is engaged, and the computer is not expecting to see that.
As far as I can tell no codes are thrown when bypassing the lockers this way.
http://www.trailduty.com/temp/lockers/lockers.pdf