Proper Diagnostic Procedures to Avoid Damaging Other Components

In the process of diagnosing electrical incidents you may be required to remove components, disconnect connectors and inspect parts.

Test equipment

When working with any test equipment, be careful to follow all manufacturers directions and warnings. Improper use of test equipment can result in damage to either your test equipment or vehicle electrical components.

SERVICE PRECAUTIONS

When working on a vehicle's electrical system you need to use care. The following guidelines will help you prevent new problems while diagnosing an electrical incident.

Removing Components

When removing components (such as an engine) which have electrical connectors, disconnect all of the connectors prior to attempting to take the component out of the car. Stretching the connector harness can cause wiring to pull loose and may create a short or open circuit as well as a possible intermittent condition.

Installing Components

When reinstalling components, wait until the component is back in the vehicle before reattaching connectors. Once the component is back in the car, check to verify that the wires and harness are properly positioned in the vehicle. Check the male and female connectors to verify there is no water, grease, dirt, etc. in the connector. Assure that the harness will not be damaged by any brackets or finishing screws. Reconnect the connector. Make sure the connector has an appropriate amount of slack to accommodate any component motion without having unnecessary slack. Secure the harness as required to prevent possible damage to the harness itself.

Disconnecting Connectors

Disconnect the connectors by releasing any locking tabs and pulling on the connector housings. Never disconnect a connector by pulling on the harness or wires.

Connecting Harnesses

Before connecting the harness connectors, inspect the housings to make sure there is no water, grease, dirt, etc. in the housing which may interfere with the proper operation of the connector or component.

Align the male and female halves to prevent bending or breaking terminals.

Make sure the connectors are fully seated when connected. Visually verify that the connector has seated and is locked into place.