3 videos. 8 min, 1:45 min and 1:24 min sec to show strange overheating

Tooljunkie said

Pos is battery
Neg is battery neg (for light)
Third one is for sender.

As mentioned, get a voltmeter to go along side with temp gauge

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Okay outta no where both gauges now are dead.

Used my test light all fuses getting power.

Dash lights work but not gauges. I took a look under I don't see anything strange