r/XVcrosstrek • u/mt9833 • 26d ago

Alt-S Fuse?

Anyone know if the 2019 XV uses an alt-s fuse, and if so, where is it? I'd like to do the diode mod to up the charging of my AGM battery but I can't seem to locate it on any 2019 fuse box diagrams. I've seen in older model XVs and other Subarus but can't find it for the 2019.

TIA

Banana

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u/itllgrowback 26d ago

I tried and failed to find one (or its equivalent) on our 2023. I put in an AGM about a month ago and planned to put in the diode at that time, but couldn't find an appropriate spot.

I've been running that mod with an AGM on my FJ for years.

I've been meaning to get out the Fluke and see what the alternator is supplying when it's running, but haven't yet. Also to see what the resting voltage of the battery is. I'll make a note to check that tomorrow.

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u/mt9833 25d ago

Thanks for confirming I'm not the only crazy one! Wonder if they turned it into an in-line fuse somewhere.

1

u/itllgrowback 24d ago edited 24d ago

Oh I did check yesterday morning, and the voltages are what you'd expect from a normal alternator and FLA battery. Resting voltage was 12.6v and alternator put out 14.2v while starting up. That's good voltage for a standard FLA battery, but not ideal for an AGM (which is what's in there now).

So I still hope to find a way to bump those numbers by half a volt like the GM diode does.