Visual Inspection

Refer to VISUAL INSPECTION WORKSHEET located in Technical Management Support/Inspection Forms.

A thorough visual inspection of all related components should be performed so that an obvious problem is not overlooked.

ELECTRICAL CONNECTIONS
Terminals in connectors must lock together. Look for connections that are not fully plugged into each other or terminals that are not fully plugged into the insulator. Also make sure the wiring between each connector, and where it goes into the convolute of the harness, is not pinched behind any screws, bolts, or is rubbing on metal, which would result in a short to ground.
In addition to all electronic component connections, the following electrical connections should also be checked for integrity:

Under Hood
- Battery cables
- Engine to firewall ground strap
- Spark plug wires
- Fuses and fusible links

Passenger Compartment
- ECU/MPI Control Unit
- MPI control relay
- Fuse Block

Underbody Connection
- In-Tank fuel pump

HOSE AND VACUUM LINE CONNECTIONS
All hose and vacuum line connectors must be fully and firmly fitted at their connections. Also, they cannot be pinched anywhere along their routing. Look for hoses and vacuum lines that are not fully plugged in, or are pinched, melted, or cut. Also, make sure hoses are not egg-shaped at their connection points causing a leak.

GREPLACING COMPONENTS
Before replacing any vehicle component, inspect connector or connectors for pin or cavity damage that may result in a poor connection or an open circuit.