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2003 Audi A4 – Solving the mystery power modude issues
Into our busy workshop this week from another garage was this Audi with no wipers and indicators. The other garage had tried another convenience module but the fault remained.
Being experienced at VAG systems and with both faults being on the steering column we could trace the fault from there
Using accurate wiring diagrams, the signals from the steering column go from the steering column control module to the power distribution module then that module tells the devices to work.
The signals were getting to the power module but it wasn’t sending them out.
A new module was sourced from the agent and plugged in no coding is necessary with this part
Pico scope is the most reliable way to test wiring and can signals.
The new power distribution module