I have a 2005 John Deere CT332. It's always started right off in the past. I haven't run it in about a month so I tried to start it the other day but there wasn't any electrical power. I figured it was a dead battery so I tried to jump start it but I couldn't get it to turn over. It would try to turn over on the jump start but run out of enough juice to turn over. I figured the bad battery was still preventing it from starting so I got a new one. I can't get the old battery out with the lift arms down so I disconnected the old battery and connected the new battery via jumper cables to the battery cables on the machine. Figured I'd start the machine using the new battery, raise the lift arms, locked them in the up position, shut down the machine and then switch out batteries. It still wouldn't start with the new battery. I checked the glow plug 80a fuse because I've had problems in the past with it blowing and yep, it was blown. So replaced it and tried again. The dash lights lit right up. I turned key to energize the glow plug, then once glow plug icon dims I go to crank it and all electrical goes dead. No more dash lights... nada. If I disconnect and then reconnect the battery, the dash lights will come back on and I can go through the same routine with the same results. I checked the starter key switch and it seems to be working ok, replaced a corroded looking relay and swapped out the rest of the relays with known good ones but still no start. All electrical just goes dead when I turn the key. I can't even get the glow plug to energize. I ran the diagnostic codes on the dash and received two: F9P8 (google search leads me to believe this code means "parking brake open or shorted circuit") and F965 (I believe this code means "fuel level sensor input high"). Can anyone verify the meaning of these diagnostic codes to confirm what they mean? Could either of these codes cause the symptoms I'm experiencing? Could the F965 code be caused by a bad fuel shut off solenoid? My next step is to try to trace the parking brake solenoid circuit to determine if there's a short or open circuit. I also still need to troubleshoot the fuel shut off solenoid. Anyone else ever experience this issue with a Deere? If so, how did you fix it? Thanks in advance for any help.