Engine won't crank
Turn the key and the starter doesn't spin — clicks, silence, or dimming dashboard.
Check basics first: battery voltage at rest should be ≥ 12.4 V; ≥ 9.6 V while cranking. The R107 uses a neutral safety switch on the shifter that must close in P or N.
What the diagnosis checks
- With the key at START, do you hear a single click or nothing at all?
- Battery resting voltage ≥ 12.4 V?
- Does the dashboard go dark when you try to crank?
- Selector firmly in P or N, brake depressed?
Possible causes it points to
- Starter solenoid or starter motor
- Discharged or failing battery
- Battery cables / ground strap
- Ignition switch contacts
- Neutral safety / starter lockout switch
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