1989 Chevrolet/GMC R/V and P Truck Wiring Diagrams

Year
1989
Make
GMC
Vehicle
Light Duty Trucks, P Forward Control, R/V Trucks, Trucks
Type
Wiring Diagrams
Models
R-V, P Truck
Publication
X-8940
Pages
143

The 1989 Wiring Diagrams booklet for R-V and P Truck Models (X-8940, August 1988) contains the complete circuit diagrams for the full-size R/V pickups, Suburban and utility models and the P forward-control chassis. A general chapter explains how to read and trace the diagrams and repair wiring; Section A then covers the R/V truck and Section B the P truck, each opening with its own page index of circuits from the fuse block and power distribution through engine controls, lighting, instruments and accessories.

Pages 2–8 (7 pages)

Description, Circuit Diagnosis and Repair

How to use the diagrams: wire coding by circuit number, size in millimetres and color, tracing circuits from the battery positive post to ground, power and ground distribution references, numbered splices and grounds, basic electric circuits and circuit diagnosis, an abbreviation list, a wire size conversion table, and on-vehicle service of circuits, Weather-Pack and Metri-Pack connectors and wiring repair, with special tools.

What this section covers

  • Wire coding and tracing circuits
  • Basic electric circuits
  • Circuit diagnosis
  • Abbreviations and wire size conversion
  • Weather-Pack and Metri-Pack connectors
  • Wiring repair
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