This was crossfire weekend for me. After I finished the dome light in the above post, I got my new PKE module "pre-wired". I picked up an extra ignition switch, gutted it out, and wired it to the control module. Now all I have to do is plug in the new ignition switch and attach a couple of other wires (for door lock, brake sense and side marker lights). I have this same module installed on my Audi S4 and I love it. When you walk into close proximity of the car, the doors automatically unlock. When I get in the car, all I have to do is press the foot brake and then press the push start button. When I am done driving, simply walk away form the car and it will lock itself up. There is a nice remote start function for this single digit weather we have been in as well. I decided to go with this because I am down to one key and cant risk losing it. This module actually cost less than the new key (programmed and cut) as well so. The unit is only rated for 30 amps for both the ignition and accessory so I decided to add two 80 amp relays (one for ignition and the other for accessory) just to be safe. Looking at the wiring of the crossfire, I was afraid that a 30 amp max limit not be enough at times and could cause problems in the future.


Each connection is soldered and double heat shrieked to ensure it is safe.



The two relays are rated for 80 amps each (may be a little overkill but id rather be safe than sorry). One relay is for the accessory and the other is for the ignition (pins 1 and 3 on the ignition switch). Pin 2 which controls the side lights when the car is off is connected to the NC side of the ignition relay. The starter wire (pin 4), and the heater controller wire (pin 6) were low enough current that I did not need an extra relay. They were wired directly into the module.



PKE push to start module wired directly to an ignition switch so it can be plug and play (almost). The key in the middle will be my new key for the crossfire.



The final test simulating all of the inputs needed to start the car. The light first lights blue when it senses the key in in range. When you press your foot on the brake and press the start button, the module will do its start sequence (first applying ignition power so it can sense the foot brake, then starting) and then the light will turn green letting you know it was successful. To turn off, press your foot on the brake and press the button once again.