The universal unit can turn on when you connect the three main wire from the ISO cable, red ACC wire, yellow B+ wire, and black ground wire.
It's possible that the red ACC wire and yellow B+ wire have the reverse pin position to your original wire harness.
You can try to exchange the red ACC wire and yellow B+ wire to check.
RegardsStatistics: Posted by Jammy — Wed May 11, 2016 5:41 am
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