For 1990-2009 cars

Figure 1: |

#### Engine Harness to Engine (LG5), Left Side

(1) | C408/C409
(2) | Upfitter TO PTO Connector
(3) | Upfitter TRANS OPT Connector
(4) | Powertrain Control Module (PCM) Connector
(5) | Engine Oil Pressure (EOP) Switch
(6) | Engine Oil Pressure (EOP) Gage Sensor
(7) | Fuel Heater

Figure 2: |

#### Automatic Transmission Harness --Typical-- without MTW/MX4/MWF

(1) | To Backup Lamp Switch
(2) | Vehicle Speed Sensor (VSS)
(3) | Automatic Transmission Modulator
(4) | Neutral Safety Switch
(5) | C408/C409

Figure 3: |

#### Engine Harness to Transmission (MTW/MX4)

(1) | Turbine Shaft Speed (TSS) Sensor
(2) | Automatic Transmission Connector
(3) | Vehicle Speed Sensor (VSS)
(4) | Park/Neutral Position (PNP) Switch
(5) | Automatic Transmission Input Shaft Speed (ISS) Sensor

Figure 4: |

#### Engine Harness to Transmission (MWF)

(1) | Transmission
(2) | Automatic Transmission Input Shaft Speed (ISS) Sensor
(3) | Vehicle Speed Sensor (VSS)

Figure 5: |

#### Instrument Panel Harness to IP Mounted Components, Right Front View

(1) | Power Brake (P/B) Booster Pump Motor Relay
(2) | Park Brake Pump Motor Relay
(3) | Trailer Stop Lamp Relay
(4) | Transmission Control Relay - MTW/MX4/Ignition Relay -- Engine Controls - L18
(5) | ABS Relay Center
(6) | Fuse Block 2 -- Underhood
(7) | Fuse Block 1 -- Underhood
(8) | C123
(9) | C121
(10) | Windshield Washer Fluid Pump
(11) | Windshield Washer Reservoir

Figure 6: |

#### Relays-Lower Exterior Bulkhead, Right Side

(1) | Automatic Transmission Modulator Relay
(2) | Starter Relay
(3) | Engine Brake Relay (LG5/K40)
(4) | Bulkhead

Figure 7: |

#### Automatic Transmission Shift Lever (Instrument Panel Mounted)

(1) | Automatic Transmission Shift Lever
(2) | Convenience Center

Figure 8: |

#### Inside of Left Frame Rail

(1) | Transmission Control Module (TCM) Interface Module
(2) | Transmission Control Module (TCM)

Figure 1: |

#### Transmission Control Module (M74)

(1) | Transmission Control Module Connectors
(2) | Transmission Control Module
(3) | Powertrain Control Module (PCM) (Gas) / Engine Control Module (ECM) (Diesel)

Figure 2: |

#### Engine Harness to Transmission-Allison

(1) | Turbine Sensor Harness Connector
(2) | Power Take-Off (PTO) Connector
(3) | Output Speed Sensor Harness Connector
(4) | Transfer Case Selector Shift Control Switch
(5) | Transmission Connector Harness
(6) | Park/Neutral Position (PNP) Switch Connectors
(7) | Allison Transmission
(8) | Engine Harness
(9) | Automatic Transmission Input Shaft Speed (ISS) Sensor