the sender is a 30 ohm variable resistor, it should read about 0-30 ohms [or 1-28 or 2-34, etc] as you move it, your wire winding may have a break along the way or the wiper contact might be corroded or not be tight against the resistor

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics