Tr3 fuel gauge sending unit is challenging my electrical understanding. I have two extra ones and I am trying to figure out which one might work best. One of them comes completely apart. However, on that one there appears to be a short because the hot lead shows ground with a continuity test back to the case. Again, the bottom assembly unbolts from the flange and I can see the little variable resistance coil dealie with the two arms coming out from the float linkage and just rubbing on the coil. I presume the problem is in the coil dealie shorting to the case. This is where I start showing my lack of understanding because if the arms are touching the coil is not the unit supposed to show some resistance or short? In addition to that, it looks like the whole unit gets submerged in fuel and why would that not cause a short. Even more problematic, how come the vehicle does not blow up if there is a short in the unit if it sparks?
Sp53
Sp53