Check the colour of the wires I see in some pics on line that there is a orange and a black.If you have a truck Manuel the wiring diagram may show it also ,are the connectors the same colour wire as the clock

Last edited by KEVINSKI; 04/08/2021 1:16 PM. Reason: More imfo
1954 Canadian GMC 9300
"The Journey"
Follow in the DITY