We have a hyster h50xm forklift ( H177B50659B ) and it keeps killing the battery if it sits for a couple days. Checking the electrical system, we have a 100 milliamp drain that goes away when I remove the 20 amp ECM fuse. Anyone have a wiring schematic for this so I can see what this fuse powers up? thanks for the help in advance
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Ok. Thanks..so am I correct in thinking then that none of the propane conversion solenoids are powered by this fuse? I see the pcm on the frame rail next to the engine but where is the diagnostic connector?
The one diagram i looked at shows a spilce from the feed wire from the fuse that goes to the ecm...it goes to the diagnostic connector aand also to the instrument cluster on pin 4....can check for corrosion in the diagnostic connector and try unplugging inst. cluster and see if drain goes away
That fuse is for the ECU only. You probably have a defective ECU.
it's a gm 3.0 and yes it has monotrol. The fuse Im talking about is mounted in a small fuse panel located on top of the valve cover. It has the fuel pump relays and other fuses in it. It's labeled as VBattECM and is a 20amp mini fuse.
I glanced thru the schematics and dont see a 20A fused ECM....for starters,what enngine is in the truck and does it have monotrolpedal and other features...is it EPA compliant truck? Any other info you can give????
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