Plug and Play Bypass Kit (DVD, NAV and backup Camera) Discussion

Originally Posted by bdl99

With the switch in one position for normal operation the e-brake wire (pin 65) should be in tact (sounds like that is working). In the other position the wire coming from the car harness should go nowhere and the end going to the AV unit should be grounded.

You mention SPDT, is that for just the parking brake switch? You need either:
1 x DPDT
or
1 X SPST (for speed) and 1 x SPDP (for Parking Brake)

The reason for this is with the speed sensor you are just making or breaking the connection where as with the Parking Brake you are making or redirecting the connection. In my diagram I show using a DPDT switch.

Hope that helps.