[4x4k30]

I did install a Pollack switching vavle with 6 prongs but only 5 were used one is blank . I have tried to just hook up the 4 wires for the 87 switch. but I do not know where the 5th one needs to go. I put in new tanks and sending units and pumps when I put in the 6.0 I have just been running on the right tank with no fuel gauge at all..i have done run out of gas several times and have to keep a 2 gallon can full in the bed ..I thank you for the help I will keep trying to figure it out