Hmmmm then fill the tank above the lower sensor, touch the wire to the lower sensor to the harness wires until the bottom LED lights, then fill the tank above the middle sensor, touch that sensor wire to the remaining wires until the second LED lights, that leaves one ????
I'm just guessing, you may not even be able to get access to do it this way?
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John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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