Disco II Wiring for Accessories
Adding an aftermarket stereo, NAV system or alarm to a Disco II? Here's a
list of where to find the important circuits involved in those types of
operations that is believed to be accurate. TEST to be sure, as this chart has
not yet been checked for accuracy.
If you aren't sure what size wire to use when you add an accessory, scroll
down to the third chart- make sure you use the correct wire!
|
12volts
 |
brown (50A)
|
+
|
ignition harness
|
|
Starter |
white/red |
+ |
ignition harness
|
|
Ignition |
yellow |
+ |
ignition harness
|
|
Power Lock |
pink/red |
- |
switch or BCU, 26 pin
plug, pin 16 |
|
Power Unlock |
yellow/pink |
- |
switch or BCU, 16 pin
plug, pin 7 |
|
Lock Motor |
pink/purple |
5wi |
fuse/relay box under
driver dash |
|
Unlock Motor |
pink/red |
5wi |
fuse/relay box under
driver dash |
|
Disarm Defeat |
pink/red |
5wi |
fuse/relay box under
driver dash |
|
Parking Lights+ |
red |
+ |
headlight switch
|
|
Parking Lights- |
N/A |
|
|
|
Hazards |
lt. green/red
|
- |
switch or BCU, 12 pin
plug, pin 12 |
|
Turn Signal(L) |
green/red |
+ |
fuse/relay box under
driver dash |
|
Turn Signal(R) |
green/white |
+ |
fuse/relay box under
driver dash |
|
Door Trigger |
pur/wht (D), pur/lt. grn
(P) |
- |
BCU, 26 pin plug, pins
17 and 4 |
|
Dome Supervision |
purple/blue |
+ |
BCU, 12 pin plug, pin 9
|
|
Trunk/Hatch Pin |
common with pass. door
trigger |
|
|
|
Hood Pin |
purple/orange
|
- |
pin sw. or BCU, 26 pin
plug, pin 15 |
|
Trunk/Hatch Release |
purple/red (fuel door)
|
+ |
release switch
|
|
Power Sliding Door |
N/A |
|
|
|
Factory Alarm Arm |
blue/green |
- |
dr. kick or BCU, 26 pin
plug, pin 5 |
|
Factory Alarm Disarm |
blue/gray |
- |
dr. kick or BCU, 22 pin
plug, pin 22 |
|
Tachometer |
white/gray |
ac |
ECM, 40 pin plug, pin 17
|
|
Horn Trigger |
purple/orange
|
- |
switch or BCU, 16 pin
plug, pin 4 |
|
Radio 12v
 |
purple
|
+
|
radio harness
|
|
Radio Ground |
black |
- |
radio harness
|
|
Radio Ignition |
lt. green/purple
|
+ |
radio harness
|
|
Radio Illumination |
red/brown (dimmer)
|
+ |
radio harness
|
|
Factory Amp Turn-on |
same as power antenna
wire |
|
|
|
Power Antenna |
red/blue |
+ |
radio harness
|
|
LF Speaker +/- |
black/white -
black/brown |
+,- |
radio harness
|
|
RF Speaker +/- |
black/pink - black/red
|
+,- |
radio harness
|
|
LR Speaker +/- |
black/yellow -
black/orange |
+,- |
radio harness
|
|
RR Speaker +/- |
black/green - black/blue
|
+,- |
radio harness
|
|
Headlight |
blue/red |
+ |
headlight switch
|
|
Speed Sense |
pink/green |
|
ECM, 40 pin plug, pin 22
|
|
Wipers |
red/lt grn (L), blu/lt
grn (H) |
+ |
windshield wiper switch
|
|
LF Window up/dn |
gray/red - gray/black
|
|
BCU, 7 pin plug, pins 1
and 4 |
|
RF Window up/dn |
gray/blue - gray/pink
|
|
BCU, 7 pin plug, pins 2
and 6 |
|
LR Window up/dn |
gray/yellow - gray/white
|
B |
switch in center console
|
|
RR Window up/dn |
gray/brown - gray/yellow
|
B |
switch in center console
|
|
Starter |
white/red |
+ |
ignition harness
|
|
Second Starter |
N/A |
|
|
|
Ignition |
yellow |
+ |
ignition harness
|
|
Accessory |
white |
+ |
ignition harness
|
|
Second Accessory |
lt. green/white
|
+ |
ignition harness
|
|
Keysense |
white/purple
|
+ |
ign harn or BCU, 16 pin
plug, pin 2 |
|
Reverse Light |
green/brown or
gray/brown |
+ |
BCU, 22 pin plug, pin 8
|
|
Door Trigger |
pur/wht (D), pur/lt. grn
(P) |
- |
BCU, 26 pin plug, pins
17 and 4 |
|
Dome Supervision |
purple/blue |
+ |
BCU, 12 pin plug, pin 9
|
|
Trunk/Hatch Pin |
common with pass. door
trigger |
|
|
|
Hood Pin |
purple/orange
|
- |
pin sw. or BCU, 26 pin
plug, pin 15 |
|
Factory Alarm Arm |
blue/green |
- |
dr. kick or BCU, 26 pin
plug, pin 5 |
|
Factory Alarm Disarm |
blue/gray |
- |
dr. kick or BCU, 22 pin
plug, pin 22 |
|
Tachometer |
white/gray |
ac |
ECM, 40 pin plug, pin 17
|
|
Brake Wire |
green/purple
|
+ |
brake pedal switch
|
|
Parking Brake |
pink/orange |
- |
parking brake switch
|
|
Horn Trigger |
purple/orange
|
- |
switch or BCU, 16 pin
plug, pin 4 |
|
WIRE GAUGE SELECTION TABLE
|
|
Amps |
Watts |
Wire gauge (for length in feet)
|
|
12V |
12V |
3' |
5' |
7' |
10' |
15' |
20' |
25' |
|
0 to 5 |
30 |
18 |
18 |
18 |
18 |
18 |
18 |
18 |
|
6 |
36 |
18 |
18 |
18 |
18 |
18 |
18 |
16 |
|
7 |
42 |
18 |
18 |
18 |
18 |
18 |
18 |
16 |
|
8 |
48 |
18 |
18 |
18 |
18 |
18 |
16 |
16 |
|
10 |
60 |
18 |
18 |
18 |
18 |
16 |
16 |
16 |
|
11 |
66 |
18 |
18 |
18 |
18 |
16 |
16 |
14 |
|
12 |
72 |
18 |
18 |
18 |
18 |
16 |
16 |
14 |
|
15 |
90 |
18 |
18 |
18 |
18 |
14 |
14 |
12 |
|
18 |
108 |
18 |
18 |
16 |
16 |
14 |
14 |
12 |
|
20 |
120 |
18 |
18 |
16 |
16 |
14 |
12 |
10 |
|
22 |
132 |
18 |
18 |
16 |
16 |
12 |
12 |
10 |
|
24 |
144 |
18 |
18 |
16 |
16 |
12 |
12 |
10 |
|
30 |
180 |
18 |
16 |
16 |
14 |
10 |
10 |
10 |
|
40 |
240 |
18 |
16 |
14 |
12 |
10 |
10 |
8 |
|
50 |
300 |
16 |
14 |
12 |
12 |
10 |
10 |
8 |
|
100 |
600 |
12 |
12 |
10 |
10 |
6 |
6 |
4 |
|
150 |
900 |
10 |
10 |
8 |
8 |
4 |
4 |
2 |
|
200 |
1200 |
10 |
8 |
8 |
6 |
4 |
4 |
2 |
Find the amperes or watts the circuit is expected to carry on the
left and the distance the wiring must run at the top - follow the columns
until they intersect - for example, a 12 volt circuit which is 15 feet long
and carries 10 amperes should use at least 16 gauge wire.
|
