So when I had my system professionally installed in 2009 I opted to buy the connecting harness to enable the unit to be controlled from the steering column stalk. However when I applied the last update from Pioneer I can't control the unit from the stalk, only directly from the unit. Has anyone else suffered similar faults? Is it a coincidence? I can't imagine it being the harness working loose as the connectors lock together.

 

Any advice is greatly appreciated.

 

Chris.