well if its like most of them you pop the steering wheel off and remove the turn signal unit and there is a clip or screw in there that holds the switch in. My advice tho is to make sure that it is the switch 99% of the time its something with the linkage that jams it up. If you really think its the switch try shooting some WD40 up the keyhole first to make sure the pins in the cylinder arent gunked up. Ive never done one on the ranger im basing it on my experiences with the old GM columns which ive repaired a ton of over the years for my old cab company and some of the older work trucks we had
There is an issue with tab in the lock (where the key goes) that runs the I left the key in the ignition buzzer breaking off and jamming the lock so it will not turn. We use a dental pick to get these out. It is a common problem. you can look down in it with a light and see if the little brass sucker is in there. It can also be the linkage from the key to the switch but usually they just break (espescially with tilt wheel) and you can turn the lock forever and it desn't move the switch. I have not seen a switch itself jam I have seen them come apart and the vehicle not start or some accessories not work.
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