Hello from New Hampshire! I just developed the same problem with my 2012 CT-335 HST today.
I started the tractor and all was fine with the instrument panel. The tractor was idling for about
30 minutes while I made some adjustments to the 3pt snow blower. When I finished, I decided to
take it for a short ride down the driveway to check out my adjustments. When I got behind the
wheel, I noticed that the temp guage wasn't functioning. I then noticed that the only thing that
was showing was the 4wd indicator, which should have been off since I didn't have 4wd on.
What's working: Engine starts and runs OK.
Horn, brake lights, turn signals, glow plug indicator, 4wd indicator (works backwards)
What's not working: Head lights, rear work lights, tachometer, temp gauge, hour meter
No other instrument panel warning lights function.
All fuses beneath the dash are OK. Battery terminals appear OK and tractor starts OK.
I notice from reading this thread that the problem has been around since at least September 2011.
I'll be calling the dealer tomorrow morning. I'll keep you posted as to what they find, if anything.
I haven't had a chance to check connectors under the hood. Some of them seem to require being
a contortionist, and I'm in no shape to be a contortionist at this time.
uch: