Section 17-01: Lighting, Exterior
1994 Mustang Workshop Manual
DIAGNOSIS AND TESTING

Electrical Schematics—Headlamps



Headlamps






Connector End Views






Pin Number Circuit Circuit Function
B1 38 (BK/O) Power Supply to Battery
B2 195 (T/W) Tail Lamp Switch Feed
I 19 (LB/R) Instrument Panel Lamp Feed
IGN Not Used
R 14 (BR) Headlamp Switch to Tail Lamp and Side Marker Lamps
H 15 (R/Y) Headlamp Dimmer Switch Feed
DN Not Used
D1 54 (LG/Y) Interior Lamp Switch Feed
D2 706 (GY) Battery Saver Door Switch Feed







Pin Number Circuit Circuit Function
1 589 (O) Speed Select
2 15 (R/Y) Dimmer Switch Feed
3 13 (R/BK) Lo Beam Output
4 993 (BR/W) Common
5 12 (LB/BK) Hi Beam Output
6 590 (DB/W) Interval Delay Set
7 196 (DB/O) Power Feed







Pin Number Circuit Circuit Function
1 196 (DB/O) Battery
2 13 (R/BK) Low Beam Headlamp Output
3 627 (BK/O) Set Alarm Input (From Electronic Door Lock Control Processor)
4 296 (W/P) RUN/ACC
5 23 (T/LG) Luggage Compartment Door Lock Cylinder Tamper Switch
6 25 (DG/P) Door Disarm Switches
7 118 (PK/O) Unlock All Doors (Unlock Passenger Door Only with Remote Keyless Entry)
8 163 (R/O) Unlock Driver's Door (with Electronic Door Lock Control System)
9 117 (PK/BK) Lock All Doors
10 936 (DG/W) Ignition Tamper Sensor
11 324 (LG/P) Start Enable Output
12 Not Used
13 Not Used
14 24 (DB/O) Courtesy Lamp Switches
15 343 (DB/LG) Alarm Warning Lamp
16 196 (DB/O) Battery
17 13 (R/BK) Low Beam Headlamp Output
18 6 (Y/LG) Horn Relay Output
19 Not Used
20 Not Used
21 14 (BR) Parking Lamps
22 14 (BR) Parking Lamps
23 397 (BK/W) Ignition Sensor Ground Input
24 Not Used
25 Not Used
26 397 (BK/W) Ground







Pin Number Circuit Circuit Function
1 640 (R/Y) 12V Input
2 563 (O/Y) Ground
3 39 (R/W) Water Temperature Gauge Feed
4 29 (Y/W) Fuel Gauge Feed
5 57 (BK) Ground
6 16 (R/LG) Ignition Switch Feed
7 904 (LG/R) Charge Indicator
8 658 (PK/LG) Malfunction Indicator Lamp (MIL) Feed
9 911 (W/LG) Transmission Control Indicator Lamp (TCIL)
10 640 (R/Y) 12V Input
11 676 (PK/O) Speedometer Ground
12 679 (GY/BK) Vehicle Speed Sensor (VSS)
13 54 (LG/Y) Battery Power
14 343 (DB/LG) Anti-Theft Indicator
15 932 (GY/W) Hi Beam Indicator
16 3 (LG/W) Left Turn Indicator







Pin Number Circuit Circuit Function
1 2 (W/LB) Right Turn Indicator
2 794 (LB) Low Coolant Indicator Feed
3 608 (BK/Y) Air Bag Indicator Feed
4 128 (P/Y) Brake Indicator Feed
5 603 (DG) Anti-Lock Indicator Feed
6 397 (BK/W) Ground
7 11 (T/Y) Tachometer Feed
8 651 (BK/Y) Ground
9 640 (R/Y) 12V Input
10 208 (GY) Low Oil Indicator
11 19 (LB/R) Illumination Lamps Feed
12 450 (DG/LG) Fasten Belts Indicator
13 640 (R/Y) 12V Input
14 875 (BK/LB) Ground
15 31 (W/R) Oil Pressure Gauge Feed
16 57 (BK) Ground