Headlamp Switch

2010 Buick Lucerne CXL, 3.9 1SECTION Headlamp Switch
WARNING: This page is about a different car, the 2011 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Headlamp Switch Connector End View
GM850856Courtesy of GENERAL MOTORS COMPANY
Headlamp Switch

Pin Wire Circuit Function
1 0.35 WH 103 Headlamp Switch Headlamps On Signal
2 0.35 L-BU 13 Park Lamp Switch ON Signal
3 0.35 D-GN 306 Headlamp Switch OFF Signal
4-5 - - Not Used
6 0.35 OG 192 Front Fog Lamp Switch Signal
7 0.35 YE 1491 Backlight Lamp Control
8 0.35 BK 450 Ground
9 0.35 D-GN 900 Lane Departure Warning On Signal (UFL)
10 0.35 L-BU 383 Trunk Release Control
11 0.35 PU/WH 1382 LED Dimming Signal (UFL)
12 0.35 PK/BK 1597 Courtesy Lamp Switch On Signal
13 0.35 PK 1444 I/P Dimming Signal
14 - - Not Used
15 0.35 OG/WH 812 12-Volt Reference
16 0.35 OG 901 Lane Departure Warning Control (UFL)
Connector Part Information
  • Harness Type: Instrument Panel
  • OEM Connector: 15416970
  • Service Connector: 13504130
  • Description: 16-Way F Micro-Pack 64 Series (BK)
Terminal Part Information
  • Terminated Lead: 13575535
  • Release Tool: J-38125-21
  • Diagnostic Test Probe: J-35616-64B (L-BU)
  • Terminal/Tray: 15359541/4
  • Core/Insulation Crimp: M/M
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.