Vehicle Damage Warnings

- Make sure the ignition is OFF before disconnecting any control module. Failure to do so could damage the module.

- When testing voltage or continuity at any control module, use the terminal side (not the wire end) of the connector. Do not probe a wire through the insulation; this will damage it and eventually cause it to fail due to corrosion.

- Be careful when performing electrical tests to prevent accidental shorting of terminals. Such mistakes can damage fuses or components and will sometimes set a second code, making diagnosis of the original problem more difficult.