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Memory Seat Module (MSM) X4 (A45)

WARNING: This page is about a different car, the 2008 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Memory Seat Module (MSM) X4 (A45) Connector End View
GM750205Courtesy of GENERAL MOTORS CORP.
Memory Seat Module (MSM) X4 (A45)

Pin Wire Circuit Function
1 0.35 WH 790 PWM Serial Data
2 0.35 YE 1519 Power Seat Rear Vertical Up Switch Signal
3 0.35 L-BU 1521 Power Seat Rear Vertical Down Switch Signal
4 0.35 TN 1522 Power Seat Horizontal Forward Switch Signal
5 0.35 L-GN 1523 Power Seat Horizontal Rearward Switch Signal
6 0.35 L-BU 277 Driver Power Seat Recline Motor Rearward Control
7 0.35 L-GN 276 Driver Power Seat Recline Motor Forward Control
8 0.35 D-BU 1064 Driver Seat Lumbar Rearward Switch Signal
9 0.35 YE 1065 Driver Seat Lumbar Forward Switch Signal
10 0.35 YE/BK 1067 Driver Seat Lumbar Down Switch Signal
11 0.35 GY 791 PWM Serial Data
12-17 - - Not Used
18 0.35 D-GN 1518 Power Seat Front Vertical Up Switch Signal
19 0.35 D-BU 1520 Power Seat Front Vertical Down Switch Signal
20 0.35 WH 1066 Driver Seat Lumbar Up Switch Signal
Connector Part Information 
  • OEM: 1740472
  • Service: 12162820
  • Description: 20-Way M Hinged Lock (BK)
Terminal Part Information 
  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit
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