FYI, I bench tested one of my Runtz reducers through a 12 volt car battery with my multi-meter and it is working properly at 6 volts. The other one I tested jumped all around never settling down to 6 volts. I then bench tested the Runtz on the fuel gauge with the sender and again the needle would not move. I started to think the gauge is now the culprit but I wanted to check the Runtz again. My thought was that somehow the Runtz gauge mounting hole was not making contact with the hot post on the gauge. The little 1/16" sides of the post hole on the Runtz would be the only part that really makes contact with the gauge post. The bottom of the Runtz, with the most contact area, is sitting on the cardboard post divider. With the Runtz hooked up to 12 volts I used my multi-meter to probe the mounting hole sides on the Runtz where I felt it would come in contact with the gauge post. Well, it was sporadic at best. Some spots would get a 6 volt reading and some got no reading at all. I then tightened the Runtz on the gauge but gently pulled the Runtz to the side hoping the hole sides would contact the post better. I then bench tested everything as a unit and the gauge worked perfectly with my sender swing arm. I'm not going to use a Runtz,too iffy, but use a 6.8 Volt Zener Diode, Part CZ5342B CT-ND instead.
Thank You everyone for all your help. I'm terrible at working through electronic problems but with your help I was able to finally get a positive outcome.
