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HOMESERVICE MANUALSCADILLAC2011CTS V, 2D COUPE, STANDARDREPAIR AND DIAGNOSISELECTRICALWIRING DIAGRAMSWIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - MEMORY SEAT MODULE THROUGH REAR WINDOW DEFOGGER RELAYCOMPONENT CONNECTOR END VIEWSPARK BRAKE CONTROL MODULE (J77)
2011 Cadillac CTS V, 2D Coupe, Standard

Park Brake Control Module (J77)

2011 Cadillac CTS V, 2D Coupe, StandardSECTION Park Brake Control Module (J77)
Fig 1: Park Brake Control Module (J77)
GM2216895Courtesy of GENERAL MOTORS CORP.
Park Brake Control Module (J77)

Pin Wire Circuit Function
A 3.0 RD/BK 242 Battery Positive Voltage
B 0.35 PU 7683 Park Brake Release Signal
C 0.35 L-BU 1134 12-Volt Reference
D 0.35 PU 7684 Park Brake Apply Signal
E 0.35 TN/BK 2500 High Speed GMLAN Serial Data Bus+ (without F55)
F 0.35 TN/BK 2500 High Speed GMLAN Serial Data Bus+
G 0.35 TN/BK 2500 High Speed GMLAN Serial Data Bus+
H 3.0 BK 1050 Ground
J - - Not Used
K 0.35 TN 2501 High Speed GMLAN Serial Data Bus-
L 0.35 TN 2501 High Speed GMLAN Serial Data Bus-
M 0.35 TN 2501 High Speed GMLAN Serial Data Bus- (without F55)
N 0.35 YE 1492 12-Volt Reference
P 0.35 L-BU 5986 Serial Data Communication Enable
R 0.35 BN 6107 Low Reference
S 0.35 D-BU 6108 Low Reference
Connector Part Information 
  • Harness Type: Chassis
  • OEM Connector: 88988439
  • Service Connector: 15306348
  • Description: 16-Way F GT 150 280 Series, Sealed (BK)
Terminal Part Information 
  • Pins: A, H
  • Terminated Lead: SEALED: 13575403 UNSEALED: 13578903
  • Release Tool: J-38125-553
  • Diagnostic Test Probe: J-35616-4A (PU)
  • Terminal/Tray: 15304720/19
  • Core/Insulation Crimp: 4/5
  • Pins: B-G, K-R
  • Terminated Lead: SEALED: 13327112 UNSEALED: 13578912
  • Release Tool: J-38125-553
  • Diagnostic Test Probe: J-35616-2A (GY)
  • Terminal/Tray: 12191819/8
  • Core/Insulation Crimp: E/1
  • Pin: S
  • Terminated Lead: SEALED: 13575406 UNSEALED: 13578902
  • Release Tool: J-38125-553
  • Diagnostic Test Probe: J-35616-4A (PU)
  • Terminal/Tray: 15304719/19
  • Core/Insulation Crimp: E/5
RENDER: 1.0x

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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.