This flasher is new, NOS, Red, a Signal-stat brand flasher, rectangular in shape and in mint condition. It is a 2-terminal flasher with the terminals in the normal right-angle configuration. These 148 flashers are known to be used on Mopar muscle cars of the 60’s
These instructions are always on the box flashers come in
and the terminals are always clearly marked
X — Power (hot lead)
L — Load (to switch operating lamps to be flashed)
P — to Pilot indicator lamp (this connection may be omitted. Flasher will operate properly either way)