I have source/band changes seemingly at random but strangely coincidental with my signal or brake activation. There are a few guys with this setup on the TBSS forums and it isn't an uncommon problem.
I'm having the same trouble with my '07 TBSS, did you get this fixed? Also do you know where to hook the illumination wire?
Thanks, Ken
This is from one of the guys on the tbssowners.com site
The SWI add-on is a voltage sensitive device. Guys with HIDs are more prone to problems because of the truck voltage variations. I had issues with my heated seats cycling and changing bands. Sometimes tapping the volume it may interpret it as a different voltage and change channels.
Here are a few things to try and have worked for me.
ONLY program the SWI do it when the truck has a full battery and with the engine running.
When you program press and hold the buttons for a full two seconds instead of the 1 second listed in the instructions.
And finally, purchase a .47 microfarad electrolytic capacitor. Attach the negative lead truck ground and the positive lead to the green lead (steering wheel wire).
This is stuff I have learned from talking to Pac engineers (not support) and no longer have issues with it changing channels. I do occasionally go back to beginning of song when I tap volume fast. I have a voltage regulator I am going to try installing.