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ignition switch wiring diagram?

29K views 8 replies 3 participants last post by  M.L.S.C.  
#1 ·
My F350 has the ignition lock removed cause it jammed, so now the ignition switch is just hanging off the harness under the dash, and I have to start it by manually moving the ignition switch slider. It's a bit annoying and uncomfortable, so I'm thinking of installing an on-off-on switch for the main power and a push button for the starter. For this I will need a diagram as to which wires gets energized during "start", "run", and on the opposite end which ones get power with the switch on "acc"? I did something similar to my Lincoln two years ago, but I'm not sure the harnesses are the same, even though they look similar.

In case you're wondering why I just don't replace the ignition lock - I can't seem to find the actuating rod on top of the column, or anywhere else for that matter, it may have fallen off the column at some point, and I have no clue as to what it looks like and how to get it back in there. Thanks!
 
#2 ·
The rod may have broken in two........ normal problem.... you must have a tilt steering column.
 
#3 ·
I will post a picture of the tilt steering column and parts......yours is #23 see my photo link.
 
#6 · (Edited)
#7 ·
cdnsarguy, truck is a 1990 XLT Lariat. #23 in your diagram is the tilt actuator lever, and my tilt works fine. I'm looking at that diagram you have, and I can't even find the ignition switch (#50 maybe?), let alone an actuating rod. Here's what PartsAmerica have listed:
Image

Does that look correct for my model year? If yes, how the heck does it go in the column - that's my biggest issue now, I can get an ignition lock cylinder but I have absolutely no clue how to get it connected to the switch! On my Lincoln only the wheel tilts, not half the column, and everything is much nicer to get to - just pull the plastic covers, all is right there, easily accessible - nothing like that in the F350, I'm at a total loss as to how to install a new rod for the ignition cylinder.

Also I figured them pins and wires out, they were just like my Lincoln (bet the ignition switch will interchange too):
- start - 41-977-ground and power on 37-32-262
- run - power on 37-16-687-297
- acc - power on 37-297

Just built me a two-switch harness to replace the ignition switch, however if I want to make it near ideal I need another switch and a relay, neither of which I have right now. Will probably hold off installing it right away, as I wanna make it so it plugs directly in the stock plug, like a breakout harness.

boomvan, thanks for the linky, will probably use it quite a lot soon.
 
#8 ·
That is the item ......one must remember the schematic is an exploded view, things are much closer together in real life.

You will be required to remove available external covers and the st wheel, you should then see the part on the top behind the turn signal MFS. If anyone has done this personally please jump in here and help MLSC.... with directions.

I really need to write up instructions for this or at least find some......... saw it done once. No camera handy....sorry.
 
#9 ·
You know, I kinda gave up on fixing the ignition lock and all, tis just a bit more work than I'm willing to put into it, besides with my luck while trying to get that piece replaced I'll break either the tilt, or the multi-switch, and likely both, lol

I did install my switches today, and they work nice, I just need one of the single-circuit switches replaced with a dual-circuit switch and one more wire added between two of the terminals, and it'll be all good!