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87'-91 Ignition switch info & troubleshooting guide

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#1 Broncobill78


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Posted 20 April 2008 - 09:09 PM

Here's everything from both the Factory manual and the Factory EVTM guide (electrical, vacuum troubleshooting guide) about the 87-91 Bronco ignition switch. If you're having ignition problems and suspect the ignition switch, lock cylinder or actuator rod then this is pretty much everything that Ford ever published about it. Hopefully this will help you solve any switch related issues that crop up and if nothing else it's good info to save & print for a rainy day :)

Attached Thumbnails

  • Ignition_switch_002.jpg
  • Ignition_switch_001.jpg
  • Ignition_EVTM_005.jpg
  • Ignition_EVTM_004.jpg
  • Ignition_EVTM_003.jpg
  • Ignition_EVTM_002.jpg
  • Ignition_EVTM_001.jpg


People who say it can't be done should not interrupt the person doing it.

84 Mustang GT (Great car to lose your license with, I recommend it for those trying to do so)
74 Ranchero (429, c6, Currie enterprises 9" w/Mickey Thompson cheater slicks, 1970 Torino shaker hood scoop)
82 Bronco (Canadian truck, kilometer speedo, dual batteries, hi-output heater, dual factory block heaters/etc)
78 Bronco (400, 33" Fun Countries, fastback softtop)
79 Bronco (460, 36" Ground Hawgs, frame-off rebuild)
84 Bronco (bone-stock beater)
73 Bronco (I only had it 2 wks before flipping & crushing it.)
76 F-350 (390, 40" Super Swampers, ugly ugly ugly fire-engine green/yellow cab w/faded purple bed)
78 Bronco (460, 38.5" Ground Hawgs, Dana 60's, boxed frame, frame-off rebuild)
86 Bronco (only truck I've ever had fall thru the ice & just plain disappear. no end of hassles from the ins. co.)
91 Bronco (25th anniversary edition, red w/grey leather everything interior, 31x11.5's)
88 Bronco (33x12.5's)
79 Bronco (Current project, 4" lift w/weenie little pizza cutters)

Looking for 78/79 parts, please let me know if you have one you're parting out.



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Posted 25 October 2015 - 11:42 AM

I have a similar problem the truck will run as long as I have the switch held to run but if I let go its like it releases and the engine dies do you know what this could be and what are the two star screw above the switch

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