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Intermittent Concern Troubleshooting: Notes

Vibration method

If 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 vehicle or engine vibration could cause an electrical malfunction. Some of the things to check for are:
  - Connectors not fully seated.
  - Wire 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 harness can cause wiring to become pinched between parts.
- The connector joints, points of vibration, and places where wire harnesses pass through the firewall, body panels, etc. are the major areas to be checked.