ejensen21 Posted December 4, 2016 Share Posted December 4, 2016 IM trying to keep it positive ground and im having a issue what am i doing wrong the starter is isolated but the solenoid isn't were do the cables go Quote Link to comment https://www.bigmacktrucks.com/topic/47884-12v-39mt-issue-b81/ Share on other sites More sharing options...
theakerstwo Posted December 4, 2016 Share Posted December 4, 2016 Pos cable goes to the end of the starter and neg cable goes to the starter lug.Starters dont care which is ground.Just wire it like that and there will be no problem. 1 Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/47884-12v-39mt-issue-b81/#findComment-353988 Share on other sites More sharing options...
ejensen21 Posted December 5, 2016 Author Share Posted December 5, 2016 The issue is the solenoid when i hook switch wire from series parallel up it shorts out Quote Link to comment https://www.bigmacktrucks.com/topic/47884-12v-39mt-issue-b81/#findComment-353994 Share on other sites More sharing options...
Maddog13407 Posted December 5, 2016 Share Posted December 5, 2016 ???????????????? why would you be using a series parallel switch with 12 volt???? ditch it, run some cables direct from batteries and be done 2 Quote Link to comment https://www.bigmacktrucks.com/topic/47884-12v-39mt-issue-b81/#findComment-354004 Share on other sites More sharing options...
ejensen21 Posted December 5, 2016 Author Share Posted December 5, 2016 No the 12v key power that turns on series parallel the one from start button i have that on the new stater for start signal Quote Link to comment https://www.bigmacktrucks.com/topic/47884-12v-39mt-issue-b81/#findComment-354046 Share on other sites More sharing options...
eddeere Posted December 5, 2016 Share Posted December 5, 2016 Not sure on what you are you are trying to do. Why keep it + ground ? I think most were changed years ago to neg ground to slow electrolysis on the frame body parts and etc. As mentioned above starters will go either way and you do not need the series parallel switch. The key switch should be for the charging system and misc. items. Just wire your start button to a power source then to the starter solenoid. If you go to neg ground you will need to polarize your generator and switch a few wires. If your generator ever goes bad you will be set up for a one wire alt. The B 81 is a neat truck how about some pictures. Quote Link to comment https://www.bigmacktrucks.com/topic/47884-12v-39mt-issue-b81/#findComment-354050 Share on other sites More sharing options...
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