2004 Saturn Ion Red LineFACTORY OEM SERVICE PROCEDURE

Body Control Module (BCM) C1

WARNING: This page is about a different car, the 2007 Saturn Ion Red Line, 2007 Saturn Ion 3, and 2007 Saturn Ion 2. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Body Control Module (BCM) C1 Connector End View
GM878462Courtesy of GENERAL MOTORS CORP.
Body Control Module (BCM) C1 Connector & Terminal Parts Information

Connector Part Information 
  • OEM: 1326143-2
  • Service: See Catalog
  • Description: 37-Way F Amp (BK)
Terminal Part Information 
  • Pins: 2-4, 19, 25-30
  • Terminal/Tray: 968074-5/17
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 12031876-1/J-35616-4A (PU)
  • Pins: 5- 7, 21- 23, 34, 37
  • Terminal/Tray: 968072-2/17
  • Core/Insulation Crimp: Pins 5- 7, 23 - C/1
  • Core/Insulation Crimp: Pins 21, 22, 34, 37 - A/5
  • Release Tool/Test Probe: 12031876-1/J-35616-40 (BU)
  • Pins: 17, 18, 20, 32
  • Terminal/Tray: 968075-5/17
  • Core/Insulation Crimp: Pins 17, 18, 20 - See Terminal Repair Kit
  • Core/Insulation Crimp: Pins 32 - 2/4
  • Release Tool/Test Probe: 12031876-1/J-35616-4A (PU)
Body Control Module (BCM) C1 Terminal Identification

Pin Wire Color Circuit No. Function
1 - - Not Used
2 OG 840 Battery Positive Voltage
3 YE 243 Accessory Voltage
4 YE 443 Accessory Voltage
5 D-BU 1307 Power Window Master Switch Lockout Control (Sedan)
6 D-BU 1307 Power Window Master Switch Lockout Control (Sedan w/A31)
7 D-BU 1307 Power Window Master Switch Lockout Control (Sedan w/A31)
8-16 - - Not Used
17 OG 1140 Battery Positive Voltage
18 GY 120 Fuel Pump Supply Voltage
19 D-GN/WH 465 Fuel Pump Relay Control
20 OG 1140 Battery Positive Voltage
21 RD 142 Battery Positive Voltage
22 RD 442 Battery Positive Voltage
23 BN 441 Ignition 3 Voltage (A31)
24 - - Not Used
25 PK 1200 Headlamp High Beam Signal
26 L-BU 20 Stop Lamp Switch Signal
27 L-BU 20 Stop Lamp Switch Signal
28 L-BU 20 Stop Lamp Switch Signal
29 L-BU 20 Stop Lamp Switch Signal
30 L-BU 20 Stop Lamp Switch Signal
31 - - Not Used
32 PK 3 Ignition 1 Voltage
33 - - Not Used
34 RD 342 Battery Positive Voltage
35-36 - - Not Used
37 RD 242 Battery Positive Voltage
Factory Service Tools

Use the Manual With the Right Hardware

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

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

When to See a Mechanic

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

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

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.