I've got an '02 Jetta TDI (diesel) with ongoing problems (DTCs and low fuel economy) that seem related to the engine electrical system. The codes are all intermittent shorts to ground on various controls – the fuel shutoff solenoid, EGR control, and boost (turbo vane) control.
I'm starting to think that the problems might be in the wiring harness and I'm wondering what my options might be. For example:
- Are harnesses available from the dealer or in the aftermarket?
- Are harness parts available - especially the connectors and terminators?
- Are used harnesses viable options?
I wouldn't mind building my own if the components are available. Would be happy to hear about others experiences and suggestions for how to go about this.