any way you can take pics of your gauges....front and back??....from looking at wiring schematics, there shouldn't be a bar between the oil pressure and voltmeter..there is a bar on the gas and temp gauges.....i think....looking at '40 truck wiring diagram, which i hope matches what you have....good luck....somebody will be able to help....Mike
http://www.vanpeltsales.com/FH_web/F...41-42truck.jpg