I was having issues with the car (86 subaru gl 4x4 gl) just changed timing belts (broken) when I took it all apart there were I am sure 2 wires on the sending unit .. I can only find one to hook back.. up.. where do the wires origonate... or??

There should only be a single wire. If you ground said wire the gauge will wrap over to max.

 

It's typical of these sending units to read low and to leak as they age. Look for breaks in the wire also as the wire runs down near accesory belts, etc.

 

GD