I have a 97 L300 fresh off the boat. My tachometer was working fine, but after the Alberta out of province was completed (how ironic

) the tachometer does not work. I have no idea if there is a direct correlation between the OOP and tachometer not working, but the're were daytime running lights installed. Suggestions?
Finally, does anyone have a NAPA or CAN Tire part number for a block heater (frost plug). Thank you in advance.