multiple dash light issue.

[NorthernABTDi]

Have an 04 jetta Tdi BEW/PD. Currently having my traction control, Abs and the red flashing brake reservoir level light on. These lights are on most of the time, even as soon as I start my car. Occasionally they will turn off for awhile but will come back on, especially after hitting a bump. Code reader says its P0600 which is a Serial Communication link issue. VAG com says it can't link to the brake module but it links to other modules just fine. I hooked up a known good brake module but it still has the same issues. VAG Com couldn't link to it either. Any ideas on what to look into? Thanks.

 

[Nero Morg]

Sounds like a data line issue, time to whip out a wiring schematic

 

[NorthernABTDi]

Thanks but wiring and me don't get along. It might as well be greek. If there are mechanical type suggestions then I can work at it but if not I might have to take it back to the shop.

 

[Nero Morg]

A wire could be mechanically broken, sounds like you should take it to a shop.