If it has a factory amp like approximately 70% of Ford Explorers it will be in the passenger side B-Pillar (IIRC you can possibly intercept it in the passenger side kick?). Hope this helps.
If you get frustrated with the DMM/9V battery approach I can try and cross-reference the wire colors on direct techs for you (if someone else doesn't beat me to it).
If you get frustrated with the DMM/9V battery approach I can try and cross-reference the wire colors on direct techs for you (if someone else doesn't beat me to it).
