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Old 12-12-2013, 06:39 PM   #1
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Join Date: Aug 2012
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Default Correct wiring for shurflo 4008 water pump?

After getting our trailer out of maintenance for some warranty work to replace the gray tank, I found the wiring to the water pump has been disconnected. This had to be done by the repair people, but I have had enough pain dealing with them and am not going back to have them fix this. Can anyone please tell me the correct connection for these wires? There is a black and red on the pump which I believe to be the ground and 12v power respectively. The other wires it appears they should be connected to (only other ones in the compartment with bare ends) are a white one and an orange-ish red. Our trailer is an X214WSD, but I'm guessing it's a standard sort of connection across the line if someone could please take a look and let me know. Thanks!

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Old 12-13-2013, 01:47 PM   #2
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Join Date: Oct 2009
Location: Arizona
Posts: 1,287

You are correct, the red wire on the pump is (+) and black is ground. Here's a link to the installation manual:

On the trailer side, typically white is the ground. But I would verify this by turning on the pump switch and measuring for 12V at the red wire with a meter.
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