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Old 03-09-2014, 07:30 PM   #1
3 Rivet Member
1969 27' Overlander
Boise , Idaho
Join Date: Apr 2013
Posts: 114
Images: 4
Wiring my new Shurflo

I bought a 69 Overlander in half-way through demolition condition. I am now ready to install a ShurFlo water pump, in the original location, front curbside next to the fresh water tank. Exiting the interior panel at this location are six wires. Four of them are 14 or 16 gauge, and I am nearly certian those four originally served the water level sensor. There are two 12 ga. conductors, one red, one white. BTW, I did not rewire this trailer, as the electrical system aactually worked almost perfectly, once I installed a new converter.

So, I have red and white conductors. The ShurFlo has black and red conductors. The red attaches to the pump at the valve/pump end of the body, the black connects at the motor end of the body. A third red conductor runs from motor end to valve end, is attached at both ends.

How do you suppose I wire this?

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Old 03-09-2014, 07:50 PM   #2
Well Preserved

1993 21' Sovereign
Colfax , North Carolina
Join Date: Jun 2003
Posts: 20,362
On the pump, red is +, and black is ground.
Turn on the switch for the pump, probably in the control panel over the couch, and see which wire has power. Use a test light. Make sure that wire does not have power when the pump switch is off, then connect it to the red wire on the pump. Find a ground, and connect it. Ignore the other wires for now, you'll figure out what they go to later in your project. Just don't bury them, you may need them.

Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.
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Old 03-09-2014, 11:19 PM   #3
3 Rivet Member
1969 27' Overlander
Boise , Idaho
Join Date: Apr 2013
Posts: 114
Images: 4
Who the heck uses black for a ground? Is that maybe a 12V thing? My wiring experience is limited to 110 and 220V.

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Old 03-10-2014, 12:10 AM   #4
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1974 Argosy 20
2014 20' Flying Cloud
Kooskia , Idaho
Join Date: Jul 2009
Posts: 4,591
The #12 wires in the trailer: Airstream uses white for all of the - (negative) wires and various colors for the +. In this case your red trailer wire is the +.

The pump black and red wires wold be black as - (negative) and red as +

So red to red and black to white.
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