Pioneer BP-540 Owner's Manual page 6

When Combined with a Regular Car Stereo
@ Use a regular power car stereo with a Green ay
maximum output of 6.5W+6.5W or —
less.
Green/black
Black
(ground) To speakers ;
Gray — (See 'Connecting the Speakers" for details.)
Connect to metal body or chassis.
Gray/black
Regular power car stereo
(Unequipped with pin jacks). Black
4d
Yellow
CE— C5 7 + .
Connect to the plus (+) circuit {clock illumination,
Fuse holder smail lamp circuits, etc.) of the car's lighting switch.
Red
Ciej— Co
Fuse holder Connect this lead to the power terminal which is
passed through the ignition switch. (DC 12V)
ciep— ae cS
(Max. 3A 12V DC)
Black
Rapa g 3 <C Connect to metal body or chassis.