I just put the pencil plugs in, disconnected the ground wire at the front of the engine, looped them together with jumper wires and attched the hot wire to the first plug at the firewall. I did not utilize the new relay that came with the kit so I can't help at that end. I kind of like the idea of a simple push button.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13