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Old 05-08-2011, 06:29 PM
kerry kerry is offline
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Join Date: Jan 2002
Posts: 18,350
Not all the harnesses are locked in. I bought a new ignition switch assembly for the 84SD and it did not have the locking feature. From what I learned when switching out that assembly, the switch should work whether locked or not. All the locking assembly does is deter thieves by stopping them from pulling off the harness and jumping the terminals as far as I can tell.

It is locked via a T fitting which slides into the plastic end of the harness and turns to lock it in place.
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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
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