If you have never done a T-Signal switch on this style before, by far the most difficult part is pulling the lock plate.
Although it is not explained in the steps above, I'll give you some additional detail. The turn signal harness runs down through the column and there is a connector at the base of the column that must be disconnected before you can fish the harness up through the column. This is a flat connector with approximately 10 wires going to it. You will want to position this connector to be able to slide it up through the column with the wires still attached. Sometimes you may need to stick a long thin screwdriver down through from the top to help you guide the T-signal wire harness and connector up through.
I hope this helps and if you have any questions, feel free to ask.
Have a Great Day
Steering wheel pull proceedure:
I don't have step by step graphics. I am using All-Data as my information tool. They offer many graphics, however on the 89 model, They don't offer much graphic detail.
Can you be specific on where you think you'll need additional help with this job, and I'll be happy to offer something possibly in a newer model that will offer additional graphic for you.
Here is an additional graphic that may be of help to you.
Just the lever needs to be removed. And one screw retains the little pivot arm that comes over from the multi-function switch.
Then 3 screws retain the t-sig switch.
Once you remove the steering wheel and remove the lock plate, the rest is pretty much common sense. You'll see that it's not too difficult from this point forward.