Pioneer Made

R5 (C) RADIO AND PLAYER
(C) 1-GROUND : Approx. 12 Volts with ignition SW at ACC or ON position
(C) 4-GROUND : Always approx. 12 Volts
(C) 2-GROUND : Always continuity

S24 (A) STEREO POWER AMPLIFIER
(A) 7-GROUND : Always continuity