Battery Drain Fuel injection

manitouboat · Post by **manitouboat** » 22 Apr 2016, 15:18

2007 S80 3.2 V6 Front wheel drive
I have isolated the drain down to the #37 fuse, fuel injection fuse under hood.
I have to listen real close in engine compartment hear a faint high pitched whine after turning engine off, until I pull the #37 fuse.
Battery dies after 24 hour of sitting without pulling fuse. Can sit for days and not die if the fuse is pulled.
Any ideas?

Post by **jimmy57** » 22 Apr 2016, 17:24

Are you sure it is #37? That shows on wiring diagram to be MAF and the injectors only. Injectors buzzing would flood engine, maybe even hydrolock it if you attempt cranking. MAF sensor wouldn't make noise.