Vibration method

If a malfunction occurs or worsens while driving on a rough road or the engine vibrates, perform the following steps.

NOTE:

There are several reasons why the vehicle or engine vibration could cause an electrical malfunction. Inspect the vehicles for the following:
- Connectors not fully seated.
- Wiring harnesses not having full play.
- Wires laying across brackets or moving parts.
- Wires routed too close to hot parts.

An improperly routed, improperly clamped, or loose wiring harness can cause it to become pinched between parts.
The connector joints, points of vibration, and places where wire harnesses pass through the firewall, and the body panels are the major areas to be checked.