DESCRIPTION
Note. On 7.3L diesel, all speed control functions are controlled by the PCM. See TESTS W/CODES - DIESEL article in ENGINE PERFORMANCE section. Wiring diagram for 7.3L diesel engine speed control is included in this article.
The cruise control system consists of control switches (ON, OFF, SET-ACCEL, COAST and RESUME), servo throttle servo/actuator assembly, deactivator switch and wiring. Vehicle speed signal comes from Powertrain Control Module (PCM).
SERVO CONNECTOR PIN IDENTIFICATION
The following test procedures make numerous references to various signals on the servo harness connector. (Scheme 1) Signal names, pin numbers and wire colors are identified in SERVO CONNECTOR PIN IDENTIFICATION TABLE.
| Pin No. | Signal | Wire Color |
|---|
| 1 | Not Used | Not Used |
| 2 | Not Used | Not Used |
| 3 | Vehicle Speed Input | GRY/BLK |
| 4 | Brake Input (1) | LT GRN |
| 5 | Command Switch Signal (2) | LT BLU/BLK |
| 6 | Command Switch Return (3) | DK GRN/ORG |
| 7 | Vehicle Power | PPL/ORG |
| 8 | Not Used | Not Used |
| 9 | Deactivator Switch (4) | RED/LT GRN |
| 10 | Ground | PNK/ORG |
| (1) This signal may also be called "brake on/off switch input". (2) This signal may also be called "speed control switch input". (3) This signal may also be called "speed control switch ground". (4) This signal may also be called "brake pressure input". |
| (1) | This signal may also be called "brake on/off switch input". |
| (2) | This signal may also be called "speed control switch input". |
| (3) | This signal may also be called "speed control switch ground". |
| (4) | This signal may also be called "brake pressure input". |
SERVO CONNECTOR PIN IDENTIFICATION
Identifying Servo Harness Connector Terminals. Scheme 1
Scheme 1: Identifying Servo Harness Connector Terminals
