[Cabinman79]

On my 2021 800 zforce, I keep getting the 10 amp aux fuse blowing.  I can replace the fuse and ride it for a few minutes and it blows again, I have not been able to find a short anywhere.  Any ideas?  What does this fuse control?  I know the fuel pump because it will not kick on until I replaced the fuse but is there anything else?

[NMKawierider]

Welcome. The AUX system controls several systems including the fuel pump, ignition and starting systems. Most should be on relays though. If I had a wiring diagram I could help you trace it out but all I have is the older 800s..which had two AUX system relays and the newer 950s. There is something on that fuse taking too much power or there is a short in the harness somewhere. Being only a 10amp fuse should narrow it down though. I'll take a look at the 950's diagram and see if I find anything interesting. Is there only one AUX fuse on your 800?

[Cabinman79]

Welcome. The AUX system controls several systems including the fuel pump, ignition and starting systems. Most should be on relays though. If I had a wiring diagram I could help you trace it out but all I have is the older 800s..which had two AUX system relays and the newer 950s. There is something on that fuse taking too much power or there is a short in the harness somewhere. Being only a 10amp fuse should narrow it down though. I'll take a look at the 950's diagram and see if I find anything interesting. Is there only one AUX fuse on your 800?

I have found only one AUX fuse

[NMKawierider]

Took a look at both the older 800s and the 950s's and they look so different that they likely won't be any help. I think it may be necessary to get the wiring diagram for your machine for this. I did not that the AUX fuse on the older ones did supply power to the fuel pump relay trigger, the EFI System, Ignition signal circuit and the AUX starter relay. And it was a 15 amp.