A number of tools make diagnostics easier. They allow you to measure electrical activity on circuits and components that would otherwise be undetectable. Digital Volt-Ohmmeter…

The most valuable reference source is the Service Manual. For 1994, light duty trucks service manuals have been reorganized to make them easier to use.…

Underneath its electronics, the 6.5L EFI diesel engine is a basic V8 diesel powerplant. The fuel pump, lines, and injectors still deliver fuel according to…

DATA LINK CONNECTOR (DLC) TERMINAL “B” — DIAGNOSTIC REQUEST When grounded to terminal “A”, terminal “B” allows the MIL to flash diagnostic trouble codes. DATA…

The Data Link Connector (DLC) is installed in the vehicle so a functional check of the engine’s electronic control system can be made at the…

Description The transmission output speed/vehicle speed sensor is mounted on the driver’s side of the transmission case, near the rear (figure 5-56). The sensor consists…

Non-EFI 6.5L diesels equipped with the 4L80E transaxle use a dedicated Transmission Control Module (TCM) to provide shift control timing, TCC apply and release, and…

The PCM uses brake switch input information to interrupt cruise control operation when the brakes are applied. On automatic transmission vehicles, there are two brake…

CRUISE CONTROL SWITCH Description The cruise control switch assembly contains three internal discrete switches that open and close according to cruise control requests by the…

The PCM uses information about cruise control status, brake and clutch switch status, and vehicle and engine speed for fuel delivery (figure 5-52). Three cruise…