Starter Relay Testing

Attach cables to jump-start vehicle (if necessary). Disconnect terminal "S" of starter relay. See Fig 1. Connect remote starter switch between terminal "S" and positive battery terminal. Ensure transmission is in Park on A/T models or Neutral on M/T models.

Fig 1: Starter System Electrical Schematic
Courtesy of FORD MOTOR CO.
Crank engine with remote starter. If engine cranks, relay is okay. Check ignition switch, neutral switch or clutch switch and circuitry for open or loose connections. If engine does not crank, replace relay.