Quote:
Originally Posted by h018871
Thank you for this
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We finally got the entire system installed yesterday. It works perfectly and we should have a short video soon. Had a funky issue with a ground loop using the big relay grounded through the fuse block bus, so we gave it it's own ground. We also used the opportunity to install a footwell lighting kit. We'll try to get the schematic, videos of the finished install, placement of components, and programming the relay boards.
We fused everything for 5A. We took 12V constant positapped from the real OBD and positapped ground(s) from wires going to lug near the dead petal behind some carpeting. You could be more ambitious and find a better constant power from the power plug in the center console or the big wire in the BCM. Most of the parts fit in the cavity accessible by removing the side panel from the dash, where you can see a color legend for the BCM plugs, below the vent. We ran the reset button to the glovebox and taped it the top so it's only visible by getting your head pretty low, but can easily be found through tactile/feeling. We placed the siren in the dash below steering column blasting right into the driver's face, it does not impede the range of motion of the tilt-steering.
Advantages of this setup:
- No second fob
- Remote start still works
- Can work in conjunction with a fuel relay immobilizer and an OBD lock.
- Provides layered defenses with a "live" dummy OBD, a siren, and an ignition lockout
- Only one wire severed, green/violet (I think? need to verify, I know it was pin 15) on the black BCM plug, for the ignition coil relay.
- Very low power draw with boards in "dark" mode
- Inexpensive
- If removed, will fail "open circuit" on the starter relay coil activation.
- Requires no special action to start the car normally, or instructions for someone else to start the car.