Sometimes single wire senders
(DiPricol and Autometer) do not make
a good ground contact. If your TT
gauge is not reading correctly this
could be the problem. One solution
is to attach a small S.S. hose clamp
to the hex of the sender and insert
a wire between the sender and the
clamp. The other end of the wire can
be rerouted to a good ground on the
vehicle. Here we are grounding
it to the transmission cooler line
with another hose clamp.
2 wires senders (ISSPRO) will not
have this problem because one of the
wires is a ground.