Cummins 3 pin data port questions

Peterson

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Joined
Feb 2, 2009
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Hey guys the 3 pin triangle on the older and 3 pin weather pack is the J1939 data port correct? And isn't this the port that most tuners and boxes hook into correct? I'm not much for vp engines, just the old 12 valves. Lol
Thanks for any info guys!
 
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