TM 10-3930-669-20 CONTINUITY TEST (1)   Ground connector P12, terminal 1. (2)   Set     MAIN     POWER     switch     to     ON position (TM 10-3930-669-10). (3)   Set   engine   switch   to   ignition   position (TM 10-3930-669-10). (4)   Observe gauge needle for reading. (a)   If  gauge  does  not  have  a  full  scale deflection, perform Steps (5) through (7) and go to Step 2 of this Fault. (b)   If  gauge  has  a  full  scale  deflection, perform Steps (6) through (7) below replace fuel sensor (Para 7-35). (5)   Connect   connector   P12   on   fuel   level sender connector. (6)   Set engine switch to off position. (7)   Set    MAIN    POWER    switch    to    OFF position. 2-139