Roof Beacon Switch (5X7/5Y0/TRW)

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Roof Beacon Switch (5X7/5Y0/TRW) Connector End View

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
1	0.5 BK	-	Ground
2	0.35 BN/WH	-	Instrument Panel Lamps Dimming Control
3	0.5 RD/WH	-	Battery Positive Voltage
4	0.5 L-BU	-	Emergency Lamp Switch Signal
5	-	-	Not Used

Connector Part Information

OEM: HCMPB-A05-K
Service: 88988747
Description: 5-Way F HCM 5PA Series (BK)

Terminal Part Information

Pins: 1-4
Terminal/Tray: SHCM-A03T-P025/20
Core/Insulation Crimp: J/J
Release Tool/Test Probe: 12094429/J-35616-64B (L-BU)