Hi jsph1961,
When installing a fuse of a larger capacity, it would not blow as easily as a higher rating. It might cause the item(s) that it is supposed to protect to blow instead. That is the reason fuses must not be of a higher rating than it is recommended.
The ECU fuse is for the Engine control and many other sub components. Without it the vehicle would not start.
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Sunday, October 26th, 2008 AT 7:13 PM