Rich
08-18-2014, 09:38 PM
I have a 2010 F150 Supercrew XLT with the 5.4 and about 42k miles. About a month or so ago, I went out and it was dead, wouldn’t start. I jumped it, drove it around for a while and everything seemed fine. A few days later same thing. I took the battery out and noticed where it had been leaking for a while. I had it tested, tested “ok” but I replaced it anyway. About a week after that, truck was dead again.
I put a meter on it and it’s drawing .84 amps. I started pulling fuses and found that when I pull fuse 26, the draw drops down to .16 amps. If I pull fuse 5, it drops a little bit more.
Fuse 26 is for the “instrument cluster, key out inhibit solenoid, radio buttons, radio info display, key chime.
Fuse 5 is for keypad illumination, brake shift interlock, SJB microprocessor power.
I started disconnecting components and when I unplugged the instrument cluster, the amp draw fell that same as when I pulled the fuse, (down to around .16 amps)
Does anyone have a wiring schematic for this truck? Also looking for some ideas on how to troubleshoot this further. Even with the fuses out/ cluster unplugged it is still drawing around 150 milliamps. Ford specs say a draw up to .050 milliamps is within specs. I’m thinking maybe it has something to do with the “smart junction box”, but that is really just a guess at this point. Truck is completely stock, no remote start, alarm, etc. Any help is greatly appreciated.
Thanks
I put a meter on it and it’s drawing .84 amps. I started pulling fuses and found that when I pull fuse 26, the draw drops down to .16 amps. If I pull fuse 5, it drops a little bit more.
Fuse 26 is for the “instrument cluster, key out inhibit solenoid, radio buttons, radio info display, key chime.
Fuse 5 is for keypad illumination, brake shift interlock, SJB microprocessor power.
I started disconnecting components and when I unplugged the instrument cluster, the amp draw fell that same as when I pulled the fuse, (down to around .16 amps)
Does anyone have a wiring schematic for this truck? Also looking for some ideas on how to troubleshoot this further. Even with the fuses out/ cluster unplugged it is still drawing around 150 milliamps. Ford specs say a draw up to .050 milliamps is within specs. I’m thinking maybe it has something to do with the “smart junction box”, but that is really just a guess at this point. Truck is completely stock, no remote start, alarm, etc. Any help is greatly appreciated.
Thanks