I have a 2007.5 6.7 3500 that I would like to be able to monitor the trans temp while towing my 5th wheel. I don’t want to add gauges to the interior so I’m looking for a Bluetooth obd reader. I have seen many for the newer trucks but haven’t found anything for the 2007 models. New to the forum...
pin 4 at the headlight switch or/br is the 12v supply to light your gauges installed
pop the dash side panel off and unplug the headlight switch and pull it out to work with..........careful the steel framing of the dash is SHARP!
made this thread because the search function doesnt cut/dry...
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