2001 Mondeo Duratec engine management fuse blown

Had the RAC man and his backup baffled for an hour when the 2001 Mondeo GHIA X 2.0 petrol died on the wife at the weekend. Driving
along as normal in dry condition and it dies and wouldn't restart. The 10 A fuse 42 in the auxilliary fuse box had blown. The handbook says this is the engine management system. 10A seems a bit high and a little disconcerted as to why it blew. Fuse was replaced with another 10A and it's been ok for 150 miles plus since. RAC man says he's never even heard of the problem never mind seen it for himself. Obviously drawing too much current but why ?
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Frayed cable insulation possibly. 10A doesn't sound particularly high given it drives the injectors.
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Yes but the ECU's injector drive DC-DC converter runs at around 80v - high voltage / low current.
Tim..
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Tim.. wrote:

But the high voltage/low current was derived from low voltage/*high current* in the first place.
(Of course, the injectors could be powered through a separate fuse.)
Andrew
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Toon wrote:

Although fairly rare, it's not impossible for a fuse to fail due to fatigue, especially if it spends most of its life going from off to near its maximum rating.
I would only start to worry if it blows again...
Chris
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