I’ve read through this entire thread, more than once, and I think I’ve retained most of the information. But, what I don’t completely understand is how to make multiple systems work together, for example: GMPP crate engine controller, VA trinary switch, DCC PWM, Dual Spal fans. Does anybody have a wiring diagram for this combination that they could post? Seems like this is popular combination of parts. And a follow up question would be if somebody used a Speartech or PSI harness instead of GMPP would that change anything? Thanks
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