Fitting aftermarket head unit ?

[Duotone]

Originally Posted by chompy_snake

How sure are you that you need the adapter? I have Kenwood head unit and the infrared led is removed! The blue wire to the led itself is hard wired to the stereo ... Does Sony use a different pulse rate or different to 2 volts? I maybe misunderstand. I thought you just need BMW iso leads and no converter box if you hard wire the signal wire to the stereo??

The op has a Harmony radio fitted and these do not use a infra red system for the steering wheel controls.

The Harmony is hard wired to the steering wheel controls without any interface.


The Sony head unit uses this plug for the steering wheel controls

Input 1 is 1.1volt

Input 2 is 2.2volt

GND = G



Dave T

[raykay]

Originally Posted by chompy_snake

How sure are you that you need the adapter? I have Kenwood head unit and the infrared led is removed!

Only the ZT with a factory fitted Kenwood unit has an adapter for it - bolted to the bracket behind the stereo, the OP has a 75 with a Harmony unit.

An adapter lead is needed, together with a patch lead for the make of stereo being fitted.

[chompy_snake]

Ah didn't know there was a difference between them, thanks for clearing that up. I'll go sit back in the corner lol