The most tell-tale sign is a single click when you try to start the engine.
Usually when a starter solenoid/relay switch is bad, you will hear only a click and the starter will not spin (crank).
from what ive read you can switch the starter relay with the horn relay and give it a try.... if she starts and the horn dont work you have a bad relay
Bad Starter. Bad Starter Relay. Bad Ignition Switch. Bad Ignition Module. Improper Ground.
Could be,low battery, loose or dirty battery connections, starter is bad, starter solenoid is bad, neutral safety switch bad or out of adjustment, starter relay is bad,
If the truck is manual. There are a couple of place to check. A bad ignition switch, bad clutch interlock switch or a bad starter relay. If it is an automatic. The selector switch could be bad.
Could be a number of things: -Dead battery -Blown Main Fuse -Bad starter relay -Bad starter -bad ignition switch
bad starter, or bad relay, bad ground or power wire to starter solenoid, bad ignition switch, blown fuse, etc
By taking it off and testing it for resistance with a digital multimeter.
It is possible that a Subaru Check Engine Code #12 is a bad starter switch. This is usually the starter relay switch malfunction code for Subaru.
Check for power at the clutch switch, then check for continuity through the switch with the clutch pedal depressed. If there is power and continuity, then the starter (or even ignition solenoid/starter relay) is the problem.
This could be a bad ignition switch, ignition relay, or ignition fuse.
There are a few things that can be wrong bad battery connection will allow low amp power but fail under a large load like starting. disconnected or frayed starter wire bad starter bad starter relay bad starter solenoid bad ignition switch