96 Eddie Bauer, 302, tow package. I just bought the rig primarily for towing a boat. But, I cannot get the trailer plug ins to work, there is no juice to any of the pins. Either the 4-prong flat, or 7 prong round. I have done everything I can do to fix, am stuck. Checked the fuses, relays wiring harnesses. What am I missing? I would really appreciate some help with this. Thanks.