The 77 is set up a little different than my 300 and when the series plugs gave me trouble for the second time this year all I could find local was the pin type of plugs for it. Was able to get a harness from a 300d in the bone yard and made it work. Yes each plug has its own wire. All 4 are hooked to the block where the 80 amp fuse is (firewall) and split off to each plug. I removed the grounding strap next to the #1 plug. Works like a champ.