6368 Posted December 4, 2014 Share Posted December 4, 2014 I found some old posts on here that said you just need to switch the wires on the back...but that didn't work. The gauges are labeled positive ground. This is for my 74 brockway they look just like the mack gauges of the same era but with chrome trim instead of black. They are not like the 82000 series SW gauges in the older trucks. Does anyone know who made these or have part numbers for them in neg. ground. The ones i need are fuel, temp, and volts. Or can i open these up and change them around internally. Quote Link to comment Share on other sites More sharing options...
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