International Ignition Switch Wiring
Working on pinning out the 4-wire ignition on my 08 International. This post is combo information and question...
I've got a BAT, IGN, ACC and STA terminals.
With the key out, continuity between none of them.
With the key in at the 10 O'clock position, there is continuity between BAT and ACC.
With the key in at the 2 O'clock position, there is continuity between BAT and ACC, as well as BAT and IGN
With the key in at the 3 O'clock position (spring start), there is continuity between BAT and IGN, BAT and STA, and then (surprisingly) not between BAT and ACC.
So everything here is as I would expect, save that when turning over the engine, it disconnects the ACC system. I'm guessing this is done to protect anything on the ACC circuit from possible voltage fluctuations during turnover?
Replicating this wiring will make installing a "hidden" cutoff key and a push-button ignition a little complicated, so I'm curious if anybody knows how necessary that disconnect of ACC when STA is engaged is.