How do know if the starter relay is bad?

To determine if the starter relay is bad, you can perform a few checks. First, listen for a clicking sound when you turn the ignition key; if there's no sound, the relay may be faulty. You can also test the relay by bypassing it with a jumper wire; if the starter activates, the relay is likely the issue. Additionally, using a multimeter to check for continuity can confirm whether the relay is functioning properly.