Posted 6/1/2012 13:37 (#2409257 - in reply to #2408589) Subject: Re: 6420 Temperature Gauge
Springville Alabama
Unplug the wires from the sending unit and use a jumper wire to connect the two wires in the plug. The guage should go all the way to hot. If it does then your problem is probably the sender. They work on resistance. The hotter the engine is the more the sender is grounded. When fulled grounded out it should read hot.