Temperature Sending Unit
http://www.forabodiesonly.com/mopar/showthread.php?p=1752708#post1752708
The resistances for "on the cold peg", middle of scale, and the hot mark are
L = 73.7 Ohms (empty)
M = 23.0 Ohms (1/2)
H = 10.2 Ohms (full)
These resistances are same for temp, fuel, and optional oil pressure gauge senders.
Temp senders are "a little tender." Don't overtighten them