Pacific Accessory Corporation - 1502 S. Santa Fe Street, Santa Ana, CA 92705
[email protected] • Voice: (800) 854-3133 • Fax: (800) 832-9722 • www.pac-audio.com
Page 2
The factory radio speaker outputs are connected to the OEM-2 inputs and the new amplifier is connected to the output side of the OEM-2, using the four RCA
jacks and extension cables. Referring to the wire color chart, connect the factory radio speaker (+) outputs to the solid color wires and the (-) outputs to the
black-striped wires. Example, LF speaker outputs of the factory radio connect to the white wire (+) and white/black (-). Continue for the remaining channels. The
OEM-2 provides an amplifier turn on signal. To use, connect the blue/white wire on the OEM-2 input side to one of the positive speaker wires or to any source
that provides 5 volts DC or greater. The blue/white wire on the output side will provide 12 volts to turn on the new amplifier. Connect the red (+) and black (-) wires
on the input side to switched vehicle power and ground. Adjust the output level controls as needed using a small screwdriver.
2) Adding an aftermarket amplifier to a standard factory radio that does not have factory amplifiers
OEM-2
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wh
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g
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v
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(-)
(+)
LF
(-)
(+)
LR
(-)
(+)
RR
(-)
(+)
RF
102.7 FM
F
ac
tory stereo
New Ampl
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(-
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(+
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(-
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(+
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New subwoofers
In
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blu/wht
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d
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for new
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mpl
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er.
blu/wht 12 volt remote output
RCA out to
new
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Referring to the wire color chart above, connect the audio output leads of the factory stereo to the input of the OEM-2, using the red striped wires as the positive
input and black-striped as negative. Most premium systems use a low -level signal from the stereo to the factory amplifiers, therefore use the low level input of
the OEM-2. Some factory-amplified systems use common audio returns and grounded shields like for instance, GM/Delco Bose vehicles. Do not cut the shield
wire or attempt to use it as an audio signal wire. Determine if your system has two common audio return wires, one for the front channels and a second for the
rear channels. If so, connect the negative input wires (black-stripe) for the front channels of the OEM-2 to the common audio return wire in the vehicle for the
front channels. Do the same for the rear channels. If the vehicle has only one audio return wire for all channels connect all of the black stripped wires to it. The
output level controls can be adjusted with a small screwdriver. Connect the red (+) and black (-) wires on the input side to switched vehicle power and ground.
OEM-2
Paci
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ic
A
cc
essory Corpor
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, CA 92705
wht/red
&
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a
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g
rn/red
& g
rn/blk
v
i
o/red
&
v
i
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(-)
(+)
LF
(-)
(+)
LR
(-)
(+)
RR
(-)
(+)
RF
102.7 FM
F
ac
tory stereo
New Ampl
i
f
i
er
blu/wht 12 volt remote output
RCA out to
new
a
mpl
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f
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er
(-
)
(+
)
(-
)
(+
)
New subwoofers
F
ac
tory
a
mpl
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f
i
er
In
pu
t
O
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blu/wht
Conne
c
t blu/wht w
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re to
f
ac
tory
a
mpl
i
f
i
er remote turn
on. Ex
a
mple: some Fords
h
a
ve
a
5 volt remote turn on.
3) Adding after market amplifiers to a factory premium amplified system (Bose, JBL, etc.)
Referring to the wire color chart, connect the new stereo positive speaker outputs to the red striped wire on the input side of the OEM-2. Connect the negative
speaker outputs to the black-striped wires of the OEM-2. On the output side of the OEM-2 connect the red-striped wires to the vehicle positive speaker wiring.
The black striped wires on the output are not used. The negative side of each speaker is either common to each other on one wire or two in the factory plug or
already grounded to the chassis. However it may be, make sure that they are grounded to the vehicle chassis. The output level control on the OEM-2 will not
function in this configuration.
OEM-2
Paci
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ic
A
cc
essory Corpor
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t
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on - S
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nt
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An
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, CA 92705
102.7 FM
wht/red
&
wht/blk
g
r
a
y/red
& g
r
a
y/blk
g
rn/red
& g
rn/blk
v
i
o/red
&
v
i
o/blk
(-)
(+)
(-)
(+)
(-)
(+)
(-)
(+)
LF
LR
RR
RF
wht/red
g
ry/red
g
rn/red
v
i
o/red
Afterm
a
rket stereo
In
pu
t
O
ut
pu
t
4) Installing a radio with floating ground speaker outputs to a common grounded speaker system like the early Fords.