Electrical Fault: Washers and Wipers

[Edward]

Hi guys I’m working on a MAN truck at work that had front end accident damage.

The whole cab & electrics had to be stripped out and replaced.

I’ve done that and plugged it into the MAN CAT computer, it shows no faults on the ECU or any of the other ECM’s.

However, the windscreen wipers and washers have a funny fault.

On setting 1 the wipers do not work at all
On setting 2 the wipers wipe slowly
On setting 3 the wipers wipe fast and every time they wipe the washers squirt.
The washer button otherwise works normally.

I’ve only just discovered the fault and will be back at work on 5 Jan. But in the meantime feel free to have some guesses and I’ll let you know what it was when I fix it.

Kerb

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