Had a weird experience recently. In the first two years of having my x758 I used a Battery Tender Jr. battery tender to keep the battery healthy during the winter when it doesn't get a lot of use. Since I needed a new battery tender recently for another vehicle I decided to buy the Noco battery tender with dash-mounted plug like another member posted in this forum recently. Got it all installed and hooked it up. Pushed the button on the Noco to switch it from standby to 12V charge/maintenance mode.
The next day I went to use the x758 and here's what happened: Turned key on, dash displayed normal start-up check and I waited for the glow plug light to go out. When it did I turned the key to crank it and it barely turned over and then everything went out. Dash was black. No starter action. Turned key off and on a couple times and nothing. It was like the battery was almost dead and when I cranked it I used the last juice. Turned off again and left it for a minute, then re-tried. That time the dash came back on and it started normally.
Used the tractor for 15 min, parked it again and plugged the Noco back into the dash plug. Came back next day to move it again and this time it did something similar but wouldn't even crank at all. As soon as I turned key to 'start' everything went dead. Put a battery charger on but noticed that it wasn't taking much change, like a full battery. I checked voltage (with charger removed) and battery was at 13.4V, so looking fully charged. Went back to try starting it again and dash lit up and it popped off just fine.
What the heck is going on here? I know the Noco charger is hooked up correctly. Not that hard to get red side to (+) and black terminal to (-).
I was going to contact Noco but I see they really only have a mail-in form. They say they have chat and call-back but neither is 'active' today (mid day on Monday during business hours). At this point I am about ready to pull everything out and return it to Amazon unless someone here has info on what is going on or what I may be doing wrong.