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Old 27-06-2012, 10:33 PM
Richard L Richard L is offline
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Join Date: Oct 2003
Location: England
Posts: 4,936
Default Re: 2000 Audi S4 HFS-3 not spraying

It is OK to see 11.64.

Please continue with the following tests:

8. If there is 12V present and the pump is not running, bridge the two thick red wires.
9. If the pump comes on, you have a faulty relay
10 If the pump still does not come on after bridge the two thick red wires
11. Check if there is 12V across the two-pin connector to the pump.
12. Check the black wire is grounded properly.
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