Vibration Method

If a malfunction occurs or becomes worse while driving on a rough road or when the engine is vibrating, perform the steps below.
NOTE:
- There are several reasons why the vehicle or engine vibration could cause an electrical malfunction. Check the following:
  - Connectors are not fully seated.
  - Wiring harnesses do not have full play.
  - Wires laying across brackets or moving parts.
  - Wires routed too close to hot parts.
- An improperly routed, improperly clamped, or loose harness can cause a wiring harness to become pinched between parts.
- The connector joints, points of vibration, and places where the wiring harnesses pass through the firewall and body panels are the major areas to be checked.