trailblazer locks without module

i have done 25 to 30 trailblazers with no problems, until now. the vehicle does not get along with lock module. check previous post for more info. i think i am going to hardwire the locks with relays, any tips? it will be my first time.

Well you need to go into both drivers and passengers doors and do reverse polarity on each, then for the back doors you need to go under the seat and send a negative pulse to pin 85 on each relay that you will find there Then go into the hatch and wire the wires there for reverse polarity. I recommend a different interface module.J Rilla

Owner/Installer

if you are feeling ambitious you can take the drivers door module apart and solder wires into the lock switch itself and use 2 relays to mimick the switch, I have done this several times and have never had a problem with it. hook common post of switch to pin 87 on both relays and hook the unlock post on the switch to one of the relays(pin 30) and same for the lock post then just use your lock wires from the alarm to trigger the relays, it sounds a lot more complicated than it actually is, really not to hard. Good Luck