I would have taken the car out for an anniversary drive, but alas, the interior is still partially disassembled. My new Spal (made it Italy) power door lock kit arrived and I was able to get it installed this weekend. I've tested it and it works, so now I just need a little more time to put the door panels back on. The rest of the work I can do from the fuse panel access door in front of the passenger's seat. I was hoping to use my old keyless entry system, but I don't think it will work.
The lock/unlock feature of the keyless system works like this -- When the receiver gets an unlock signal from the transmitter fob, it sends a negative pulse down one of the wires. This wire is attached to the power door lock module on the unlock side. When the door lock receives the pulse, the lock actuators fire in the unlock direction. Locking sends a negative pulse down another wire which basically makes the actuators go the other way. I've probed the wires on the keyless module, and it looks like the wires have a resting 12V, with a negative pulse. I talked to a tech at Spal and their power door lock system is expecting a resting zero V with a negative pulse. Good thing I checked and asked the question. I probably would have fried my new door lock module. Bad thing is now I need to wait some more to get a new keyless entry system.
Posts
