For 1990-2009 cars

Connector 1: | BCM X1
Connector 2: | BCM X2
Connector 3: | BCM X3
Connector 4: | BCM X4
Connector 5: | BCM X5
Connector 6: | BCM X6
Connector 7: | BCM X7
Connector 8: | Data Link Connector
Connector 9: | Resistor

### BCM X1

#### Connector Part Information

- OEM: JST HITPB-25-D-K
- Service: N/A
- Description: 25-Way F 064+280 Unsealed

#### BCM X1

Pin | Wire Color | Circuit No. | Function
--- | --- | --- | ---
1 | RD/WH | -- | Battery Positive Voltage
2 | RD/WH | -- | Battery Positive Voltage
3 | RD/WH | -- | Battery Positive Voltage
4 | RD/WH | -- | Battery Positive Voltage
5 | D-BU/WH | -- | Right Front Turn Signal Lamp Supply Volt
6 | -- | -- | Not Used
7 | YE | -- | Wiper Motor Park Switch Signal
8-10 | -- | -- | Not Used
11 | D-GN/WH | -- | Fog Lamp Relay Control
12 | OG | -- | Left Trailer Turn Signal Lamp
13 | YE | -- | Right Trailer Turn Signal Lamp
14 | L-GN | -- | Rain Sensor Signal
15 | OG | -- | Windshield Washer Relay Control
16 | BN/WH | -- | HDLP High Beam Relay Control
17 | -- | -- | Not Used
18 | BN | -- | Rain Sensor Signal
19 | D-BU | -- | Accessory Wakeup Serial Data
20 | YE | -- | Rear Fog Lamp Relay Control
21 | YE | -- | Run/Crank Relay Coil Control
22-23 | -- | -- | Not Used
24 | WH | -- | Headlamp Washer Relay Control
25 | -- | -- | Not Used

### BCM X2

#### Connector Part Information

- OEM: JST HITPB-25-E-N
- Service: N/A
- Description: 25-Way F 064+280 Unsealed

#### BCM X2

Pin | Wire Color | Circuit No. | Function
--- | --- | --- | ---
1 | YE | -- | Left Rear Stop/Turn Lamp Supply Voltage
2 | D-GN | -- | RR Stop/Turn Lamp Supply Voltage
3 | -- | -- | Not Used
4 | L-BU/WH | -- | Left Front T/Signal Lamp Supply Voltage
5 | -- | -- | Not Used
6 | BN | -- | Rear Defog Indicator Supply Voltage
7-10 | -- | -- | Not Used
11 | BN | -- | RAP Relay Coil Control
12 | -- | -- | Not Used
13 | L-GN | -- | Run Relay Coil Control
14 | BN | -- | Accessory Voltage
15 | PU | -- | Hood Closed Switch Signal
16 | L-BU | -- | Park Brake Switch Signal
17 | -- | -- | Not Used
18 | BN | -- | Horn Relay Control
19 | WH | -- | Rear Defog Relay Control
20 | GY | -- | Wiper Motor Relay Coil Supply Voltage
21 | BN | -- | F/Windshield Wiper Switch High Signal
22 | -- | -- | Not Used
23 | PK/WH | -- | HLDP Low Beam Relay Control
24 | D-BU | -- | Park Lamp Relay Control
25 | -- | -- | Not Used

### BCM X3

#### Connector Part Information

- OEM: JST HITPB-25-F-PK
- Service: N/A
- Description: 25-Way F 064+280 Unsealed

#### BCM X3

Pin | Wire Color | Circuit No. | Function
--- | --- | --- | ---
1 | GY/BK | -- | Courtesy Lamp Relay Control
2 | L-GN | -- | Backup Lamp Supply Voltage
3-7 | -- | -- | Not Used
8 | BN/WH | -- | Right Front Door Ajar Switch Signal
9 | -- | -- | Not Used
10 | GY/BK | -- | Left Front Door Ajar Switch Signal
11 | GY | -- | EVAP Core Temp Sensor Signal
12 | PK/BK | -- | Lift Gate Ajar Switch Signal 1
13-15 | -- | -- | Not Used
16 | PU | -- | Intrusion Arm On Signal
17-19 | -- | -- | Not Used
20 | PU | -- | Door Lock Key Switch Unlock Signal
21 | YE | -- | Backuplight Lamp Control
22 | L-GN | -- | Door Lock Key Switch Lock Signal
23 | BN | -- | Trunk Key Switch Signal
24-25 | -- | -- | Not Used

### BCM X4

#### Connector Part Information

- OEM: JST HITPB-28-G-H
- Service: N/A
- Description: 28-Way F 064+280 Unsealed

#### BCM X4

Pin | Wire Color | Circuit No. | Function
--- | --- | --- | ---
1 | -- | -- | Not Used
2 | PK | -- | L/Glass/Trunk Exterior Release Control
3-6 | -- | -- | Not Used
7 | L-GN | -- | Left Front Door Lock Relay Control
8 | OG | -- | Rear Wiper Auto On Signal
9 | PK/BK | -- | Driver Door Unlock Relay
10 | BN | -- | Exhaust Gas Recir Temperature Sensor Low Reference
11 | OG/BK | -- | Engine Main Relay Fused Control
12 | OG/BK | -- | Driver Door Lock Switch Lock Signal
13-14 | -- | -- | Not Used
15 | D-GN | -- | Alarm Armed Signal
16 | L-BU | -- | Rear Fog Lamp Switch Signal
17-22 | -- | -- | Not Used
23 | BN | -- | Left Front Door Open Switch Signal
24 | D-GN/WH | -- | A/C Request Signal
25-28 | -- | -- | Not Used

### BCM X5

#### Connector Part Information

- OEM: HITPB-27-A-LM
- Service: N/A
- Description: 27-Way F HIT Series Unsealed (L-GN)

#### BCM X5

Pin | Wire Color | Circuit No. | Function
--- | --- | --- | ---
1 | -- | -- | Not Used
2 | WH/BK | -- | Ignition Key Resister Signal
3 | GY | -- | Cruise Control Switch Signal
4 | WH | -- | Off/Run/Crank Voltage
5 | L-GN | -- | Windshield Wiper Switch High Signal
6-7 | -- | -- | Not Used
8 | BN/BK | -- | Windshield Wiper Switch Low Reference
9 | L-BU | -- | Windshield Wiper Switch Low Signal
10-13 | -- | -- | Not Used
14 | PK | -- | Run/Crank Ignition 1 Voltage
15 | L-BU/WH | -- | Left Front Turn Switch Signal
16 | D-BU/WH | -- | Right Front Turn Switch Signal
17 | PK | -- | 12-Voltage Reference
18 | PU | -- | HDLP Dimmer Switch High Beam
19 | BN | -- | Hazard Switch Signal
20 | D-GN | -- | Tap Up/Down Enable Signal
21 | YE | -- | Accessory Voltage
22 | -- | -- | Not Used
23 | L-BU | -- | Shift Select Switch Perform Signal
24 | PK | -- | Windshield Washer Switch Signal
25 | YE | -- | HDLP Switch Flash To Pass Signal
26 | BN/WH | -- | BTSI Solenoid Control
27 | -- | -- | Not Used

### BCM X6

#### Connector Part Information

- OEM: JST HITPB-25-B-5
- Service: N/A
- Description: 25-Way F Unsealed

#### BCM X6

Pin | Wire Color | Circuit No. | Function
--- | --- | --- | ---
1 | OG | -- | Electronic Control Unit 12-Volt Reference 3
2 | RD/WH | -- | Battery Positive Voltage
3 | BN/WH | -- | I/P Lamp Dimming Control
4-7 | -- | -- | Not Used
8 | L-BU | -- | HDLP Switch Park Lamp Signal
9 | -- | -- | Not Used
10 | D-BU | -- | Lift Glass/Trunk Release Signal
11 | WH | -- | Ambient Light Sensor Signal
12 | WH | -- | Headlamp Switch On Signal
13-16 | -- | -- | Not Used
17 | D-GN | -- | HDLP Switch Off Signal Control
18 | PK | -- | Intrusion Sensor Switch Disable
19 | -- | -- | Not Used
20 | L-BU | -- | Rear Defog Switch Signal
21 | L-BU | -- | Traction Control Switch Signal (1)
22-24 | -- | -- | Not Used
25 | PU | -- | Interior Lamp Defeat Switch Signal

### BCM X7

#### Connector Part Information

- OEM: JST HITPB-25-C-LE
- Service: N/A
- Description: 25-Way F 064+280 Unsealed

#### BCM X7

Pin | Wire Color | Circuit No. | Function
--- | --- | --- | ---
1 | BK | -- | Ground
2 | RD/WH | -- | Battery Positive Voltage
3 | RD/WH | -- | Battery Positive Voltage
4 | -- | -- | Not Used
5 | BK | -- | Ground
6 | -- | -- | Not Used
7 | YE | -- | Security Indicator Control
8 | BN/BK | -- | High Speed GMLAN Serial Data (+)
9 | BN | -- | High Speed GMLAN Serial Data (-)
10 | D-GN | -- | Low Speed GMLAN Serial Data
11 | D-GN | -- | I/P Lamp Dimmer Switch Signal
12 | OG/WH | -- | 12-Voltage Reference
13 | PU | -- | Brake Pedal Switch Normally Closed Contact Signal
14 | BN | -- | EVAP Core Temp Sensor Low Reference
15 | -- | -- | Not Used
16 | BN/BK | -- | High Speed GMLAN Serial Data (+)
17 | BN | -- | High Speed GMLAN Serial Data (-)
18 | YE | -- | Backlight Lamp Control
19 | L-BU | -- | Serial Data Communication Enable
20 | -- | -- | Not Used
21 | OG | -- | Front Fog Lamp Switch Signal
22-24 | -- | -- | Not Used
25 | PU/WH | -- | LED Dimming Signal

### Data Link Connector

#### Connector Part Information

- OEM: MOLEX 51115-1611
- Service: N/A
- Description: 16-Way F OBD II Unsealed

#### Data Link Connector

Pin | Wire Color | Circuit No. | Function
--- | --- | --- | ---
1 | D-GN | -- | Low Speed GMLAN Serial Data
2-3 | -- | -- | Not Used
4 | BK | -- | Ground
5 | BK/WH | -- | Signal Ground
6 | BN/BK | -- | High Speed GMLAN Serial Data (+)
7 | PU | -- | Engine/Radio Serial Data K Line
8 | WH | -- | Central Control Module Diagnosis Enable
9-13 | -- | -- | Not Used
14 | BN | -- | High Speed GMLAN Serial Data (-)
15 | -- | -- | Not Used
16 | RD/WH | -- | Battery Positive Voltage

### Resistor

#### Connector Part Information

- OEM: PED 15326801
- Service: N/A
- Description: 2-Way F GT 150 Sealed

#### Resistor

Pin | Wire Color | Circuit No. | Function
--- | --- | --- | ---
1 | BN/BK | -- | High Speed GMLAN Serial Data (+) 1
2 | BN | -- | High Speed GMLAN Serial Data (-) 1