Quote:
Originally Posted by peterux
I've been thinking about what value fuse to put in my fuselink?
Does anybody know what current range an ECU draws for the engine?
Maximum current draw scenario could be......
Engine running 5.0A??
Colling Fan on 12.0A
Heater on 3.0A?
Headlight m/beam 3.8A
Driving lights 3.8A
Sidelights x4 1.4A
Hazards on 6.4A
Fog and Reverse 2.9A
Which makes about 38 amps, so I reckon on a 40Amp fuse.
Comments appreciated,
Peter
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The fuselink is only really to protect against a catastrophic failure - a short between the live side of the fusebox and the battery perhaps. My donor only had a fuselink between the separate ECU connection and the battery. The heavy wire to the fusebox was (and is) unfused.
I don't think 38 is anywhere near enough. If you use too small a fuse, believe it or not, they can actually wear out. The constant heating up and cooling gradually destroys the fuse link.
What normally decides the fuse rating is the size of the wire that it is feeding, not the actual load. You can look up the current rating for the wire and base the fuse on that.
Cheers
Robin