Aftermarket Stereo Adapter for Steering Wheel Controls

Wanting to Upgrade your Steering wheel to Multifunction but have a Aftermarket stereo like? :
• Kenwood**
• Alpine
• Pioneer

• Sony

• Clarion

• JVC

Then you will most likely need one of these. 

Otherwise the steering controls may not work. You need this in addition to the STMV1. 

Works with most Porsches PCM of 4 or below:

• 911's 997/991,
• Cayman/Boxster 986/981
• Cayennes both gens
• Panameras

 
Bonus: It will also enable other features to work:
Ignition, parking light, vehicle speed sense, hand brake, and reverse analog signals in some vehicles.

** For Kenwood, use brown wire coming out of unit, cut it free from 4 pin Molex connector, and use that as the wire to connect to yellow/blue Kenwood SWC input wire