Talk to a lot of people before you just 'take the switch out'. From what I have heard there is considerablely more to the job than there seems.

Take out your instrument panel. Its dead easy. If you have a manual oil pressure guage plug it ASAP. Don't just stick a match stick in the end but get a threaded fitting that will seal it. Otherwise when you accidentiially start the car, which you will, you will not only fill your shoes but most of the driver's floor pan and back of the insrtument panel with oil. The really black Diesel kind of oil.

Pull the plug out of the back of the ignition switch. The plug has numbers at each hole. Connect a jumper(small alligator clips will fit into the holes) from hole no. 30 (either one-there are 2 of them) to the corresponding pin on the ignition switch. This will bring power to the switch.

Now jumper hole and pin no. 15. This is the wire that takes power to the no. 3 terminal on the ac starter relay when you turn the ignition switch to the no. 2 position. Read my previous post about this relay. With a volt meter or just a wire you can touch a ground at the no.3 hole in the starter relay and get a reading. If you jump this no. 3 wire to the no. 1 wire at the relay plug your starter should kick in.

Back to the ignit. switch. Find the pin on the back of the ignit. switch that corresponds to plug hole no. 50. You'll have to count around the back of the switch and find the pin by feel since you can't see back there. If you attach a jumper to no. 50 pin and turn the ignit. switch to start you should get power from your jumper.

Next connect the other end of that jumper to the no. 50 hole in the ingit. plug. Get someone to hold the ingit. switch in the start position. You should get power to no. 4 wire at the ac start relay.

If you have power at the no. 4 hole plug in the start relay take the back off the plug. It just pops off. Now if you touch a jumper from the no. 4 pin in the back of the plug to ground not only should you feel the relay click in but your starter should also kick in. By doing the above you have bypassed the trans. safety switch. This will enable you to test all the components of the starter relay circuit.

From what I have just been through, as I mentioned in my earlier note to you, I would check for a ground fault first. If you have put in a new solinoid and it stopped working after 6 months I would look at something other than the solinoid, esp. since you can jump it with a screwdriver. The solinoid in my car is 30 years old and still going.