BGarofalo Posted July 23, 2016 Share Posted July 23, 2016 I'm going through this Mack I bought and there are 2 switches that are factory that I'm not sure what they do. I figured rather than trace wires I would just ask. Both are located next to the PTO throttle and both light up but don't appear to actually do anything. Any help would be appreciated. Quote Link to comment https://www.bigmacktrucks.com/topic/46182-mystery-switch/ Share on other sites More sharing options...
hatcity Posted July 23, 2016 Share Posted July 23, 2016 appears that you can have auxillary power by either battery power (when shut down) or when key is on Quote Success is only a stones throw away.................................................................for a Palestinian Link to comment https://www.bigmacktrucks.com/topic/46182-mystery-switch/#findComment-340141 Share on other sites More sharing options...
j_martell Posted July 23, 2016 Share Posted July 23, 2016 Any work lights or strobes?? Or remnants of such?? Quote Lack of planning on your part does not constitute an emergency on my part.... Link to comment https://www.bigmacktrucks.com/topic/46182-mystery-switch/#findComment-340148 Share on other sites More sharing options...
Dirtymilkman Posted July 24, 2016 Share Posted July 24, 2016 Those switches are an add on option when you order a truck. The batt switch will be hot all the time and the other is hot only with key on. The wires are in the dash in the center of the dash. This way Mack figures people won't be splicing into factory harnesses. Quote Link to comment https://www.bigmacktrucks.com/topic/46182-mystery-switch/#findComment-340180 Share on other sites More sharing options...
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