Batteries NOT charging while towing
Did a search and saw some good info about batteries charging/not charging while towing...but here's a situation some may not know about - I didn't, and I've towed for nearly 6 yrs with my 2008 2500 D/...
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I love this tester. You know exactly what you have, including 12v hot wire. Shows RT (right turn) TM (tail/marker) LT (left turn) 12v BK (brake) and BU (backup).
4 pin/7 pin tester.
4 pin/7 pin tester.
