Radio Wiring 1985-1993 Cabriolets

[Briano1234]

Radio wiring
85-89

Red 12v+ large Unswitched power need for memory B+
Brown large main frame ground
gry/blue dash light

lf spk
brn/red -
brn/gn +

rf spk
brown -
br/red +

lr spk
brown -
blue +

rr spk
brown -
red +

You will need to get Switched power from Defroster switch black/yellow

Radio2 85-89

Red Large 12V+ unswitched power for memory b+
Brown large frame ground
grey/blue dash light

lf spk
brn -
brn/blu +

rf spk
red +
brn/white -

lr spk
br/r -
blu/green +

rr spk
red/green +
br/black -

You will need to get Switched power from Defroster switch black/yellow


1990

Red Large 12V+ unswitched power for memory b+
Brown large frame ground
grey/blue dash light
You will need to get Switched power from Defroster switch black/yellow

lf spk
brn/blue
blue

rf spk
red
brn/white

lr spk
br/red
blk/green

rr spk
red/green
brn/black


1991-93 six speaker passive tweeter high in door

t8pin 7 red large 12v+ unswitched
t8pin 4 Brown/red 12v+ switched
t8pin 8 red large gnd
t8pin 6 grey/blue Dash light
Brown/red large 12v+ switched

lf spk
brn/blu -
blu +

rf spk
red +
brn/white -

lr spk
brn/red -
green/blue +

rr spk
red/green -
brn/black +

1992-93 Active Amplified 6 speakers.
Speaker amplifiers

The Bass speakers are wired from the amplifiers, and there is no color matching on them.

Left

brown/black amp t6/1 Tweater gnd
Red amp t6/2 Tweater +
brown/red amp t6/3 Midrange left gnd
blue/green amp t6/4 Midrange left +
red/gray amp t6/5 Power from f3
brown amp t6/6 ground

amp t4f/1 blue/brown to t10/9 radio
amp t4f/2 green to t10/10 radio
amp t4f/3 white/blue to t8/3 radio
amp t4f/4 red/black to t10/5 radio


Right

amp t4e/1 blue/brown to blue/red t10/7 radio
amp t4e/2 green to blue at t10/8 radio
amp t4e/3 white/blue to t8/3 radio
amp t4e/4 red/black to t10/5 radio

brown/black amp t6a/1 tweeter -
red amp t6a/2 tweeter +
brown/red to brown/black amp t6a/3 Mid Range -
blue/green to red/green amp t6a/4 Mid range +
red/gray amp t6a/5 Power from f3
brown amp t6a/6 ground


RADIO

t8/1 White/Yellow Speed Sensor g54 (cluster)
t8/2 empty
t8/3 white/blue
t8/4 Brown/red 12+ switched
t8/5 empty
t8/6 Gray/Blue Panel Instrument Light +12
t8/7 RED 12+ unswitched
t8/8 Brown Ground

t10/1 empty
t10/2 empty
t10/3 white/blue
t10/4 empty
t10/5 red/black
t10/6 empty
t10/7 blue/red
t10/8 blue
t10/9 blue/brown
t10/10 green


Tips
Large diameter wires are usually grnds or powers
small diameter wires are speaker

To test speaker pairs take the color designated
and touch to a 9Vdc battery you should hear a scratching or popping

Solder and heat shrink all connections.

[Briano1234]

What with Christmas time approaching and new radios are usually installed....
Couldn't find the previous thread.. so I stuck it here....

[kamzcab86]

FWIW, the Bentley diagrams weren't 100% correct for my '86. If I can find my notes from back when I replaced the speakers and wires, I'll post up the actual wire colors that were in mine.

[BetaOp9]

Thanks I needed this.

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