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      08-27-2019, 09:11 AM   #1
MrSweet1991
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Drives: BMW E90 330D M Sport
Join Date: Apr 2017
Location: West Midlands

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E90 330D - Auxiliary Water Pump Not Working

Hi All,

I got a fault for the Auxiliary Water pump a while back so I took mine off to inspect inside and a screw broke so I purchased another one off fleabay only to find the same issue. I spliced the brown wire and connected it to the ground connection on the side of the car by the expansion tank and then used ISTA to run the pump for 10 second but still nothing. The other wire red and white I think it was goes to a loom and then down by the ECU box and connects to the IHKA so I'm not sure what to do on that side of things. Also, I was going to use a multimeter to test for a voltage but when you pull the black connection off its a female connector with two small holes, so without splicing the wires how are you supposed to test the connector anyway?
Appreciate 0