Why do fuses repetitively blow?

Can any one help me figure out why my car keeps blowing the engine fuse?

Seriously: The electrical or mechanically-based problem is NOT being repaired before the new fuse is inserted.
This is true even if the new fuse lives for a while before it blows. If this is the case, the fuse’s threshold is just below the short’s amperage.
If the fuse blows immediate or quickly upon replacement, the short is likely total — not partial. It must be repaired by tracing the circuit.
Identify the specific circuit and then use a circuit tracer light or some device to isolate the location of the short.

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