John Veninger

I hooked up an older P2 brake controller using the relay setup for the brake signal.
I'm getting no voltage from the Cayenne's brake input to activate the relay. Took off the relay and measured the voltage, zero with brake pressed.
I triple checked the wiring and the controller powers up fine.
Does anyone know if there is a fuse for the brake signal?

Was going to get a new P3 so I can get rid of the relay, but with no voltage signal that won't work. Don't really want the RF version and really have no plans to tow larger trailers very much. Just a backup for the pickup if needed.
Thanks for any help in advance.