Last week my F525 light it's battery charging light. Voltage at the battery was 12.2+-, and did not change one bit when the engine was running, so I thought OK, dead voltage regulator. New regulator, start the engine and the light goes out. Great!
Except that when you release the parking brake, the battery light comes on.
Break on, no battery light.
Brake off, immediate battery light.
Did I bump some wire or something? Safety switch?