I was wondering if this could part of my problem too. When we turn the key nothing happens there is very little to no resistence. We changed out the ignition switch and it looks like the part that plugs into the switch has melted a little bit so maybe not getting good connection there. Please let me know what you think
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Re: 1990 Ford Bronco Fullsize
You will have to replace the connector, the contacts have been overheated and you will have more problems, if you can't get a repair connector from Ford try getting a good used one, all Ford models used the hardshell section, you may have to move around wires and splice in any new connectors needed. Before you start make a simple diagram of where the wires go.
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I had a similar problem with an '86 Bronco. It would start just fine but wouldn't turn off. The problem I experienced was with the linkage between the key switch and the ignition switch. When you start the truck it pushes the linkage, when you turn it off it pulls the linkage. A very small pin had fallen out that allowed the key switch to pull the linkage back and turn off the ignition switch. I wasn't able to find a replacement part and ended up drilling and tapping the hole where the pin went and making my own "threaded in" pin (used lots of loctite). You really have to take a lot of the steering column apart to get to the piece in question. If you are still having the problem contact me thru FixYa and I'll send you the diagrams I have.
I just had that same problem on a silverado. Yes, you have to replace the switch. Autozone has a tool you can use to remove the steering wheel. If you are not mechanically inclinced you can still do this. Removing the steering wheel sounds scary, or at least it did to me, but it wasnt bad at all.
down under the dash on the side of the steering column you will see a ingition switch they go bad,remove the two wire harness they only go back in onw way so dont worry,take the two small screws out remove the rod and take off and put the new one back.align the rod into the new switch place it on the column as if it were hooked up.turn the key at the same time you hold the switch in place and start the truck. after you get it adjusted then put it on and tighten the switch.