Ditto that on the sending unit. Gauge function test is as easy as disconnecting the wire at the sending unit, then grounding that wire. You should see no pressure, then full pressure respectively. If you do, then your gauge and associated wiring is all OK and you know the sending unit is in need of replacement.
CUSTOM WHEEL & TIRE PACKAGES
$125 LED LIGHT PACKAGE - FREE SHIPPING
REBUILDING HOLLEY MARINE CARBS - $249 DELIVERED
REBUILT COMPLETE MARINE HOLLEY 4160 CARBS
FOR 302, 351 & 454 STARTING AT $425 DELIVERED
Email - firstname.lastname@example.org