Body Control Module (BCM) X3

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Body Control Module (BCM) X3 Connector End View

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
1-3	-	-	Not Used
4	0.35 L-BU/WH	1414	Left Turn Signal Switch Signal
5	0.35 L-BU	1714	Windshield Washer Switch Low Signal
6	0.35 D-BU/WH	658	Cruise Control Switch Signal
7	0.35 WH	103	Headlamp Switch Headlamps On Signal
8	0.35 BN/WH	301	Park Lamp Switch On Signal
9	-	-	Not Used
10	0.35 L-BU	1872	Exterior Lamps Off Input
11	0.35 OG	192	Front Fog Lamp Switch Signal
12	0.35 PU	524	Headlamp Dimmer Switch High Beam Signal
13	0.35 PK	94	Windshield Washer Switch Signal
14	0.35 BN	1356	Flash To Pass Switch Signal
15	0.35 BK/WH	1251	Ground
16	0.35 TN	2144	Hazard Switch Signal
17	0.35 D-BU/WH	1415	Right Turn Signal Switch Signal
18	0.35 L-GN	1715	Windshield Washer Switch High Signal

Connector Part Information

OEM: 638397-1
Service: 88988876
Description: 18-Way F Unsealed (BK)

Terminal Part Information

Pins: 4-8, 10-18
Terminal/Tray: See Terminal Repair Kit
Core/Insulation Crimp: See Terminal Repair Kit
Release Tool/Test Probe: See Terminal Repair Kit