I went for a clean self contained install of a garage door opener in the batwing. Picked up a rear defroster switch and was inspired by this guys install
clicker to use a double pole reed switch to simultaneously light the switch led.
Parts :
Keychain opener - new Ebay
2 switch batwing - new
late style matte finish defroster switch - used Ebay
late style matte finish switch blank - new Ebay
OE porsche switch socket and connectors - new
DPST reed relay and DIP socket - Mouser
Schematic :
This shows why you can't simultaneously activate the remote and light the switch status LED. The switch common is +12V and the LEDs are switched separately to ground in normal use by the control relay in the car. The DPST reed switch allows you to do both.
Finished assembly and wiring :
The absolute hardest part of this project was snapping the switch blank into the batwing. It took me 30 minutes and sore fingers to finally get it seated.
Wires routed out of remote case :
Two wires come straight off of the microswitch in the remote, the other two come straight off of the +/- terminals of the battery. This remote uses a standard 12V which is perfect to activate the defroster switch status light and should last a long time. The reed relay is correspondingly a 12V version.
Socketed reed relay. Decided to do this rather than risk soldering straight to a $6 part. Plus it can be easily swapped if it dies in the future.
Parts secured in with velcro and sticky tape.
Finished install with bright status light and yes, the garage did open too.
