1995 sable when the ignition is turned to the on postion nothing happens except the lights go dim like a big draw of power

Try turning on the headlamps when it fails and see if they dim when you attempt to start it. If not, probably bad starter solenoid.

When you turn key to `start'' does it seem to be drawing power,like do the lights dim? don-ohio

Is the lights being on draining the battery, if not then you have two problems, first check the lights, unplug connector from headlight switch and see if that turns lights off, if so then replace the headlight switch, next is the starting if battery is fully charged and nothing happens when key is turned then i would start by checking the starter, with a test light have someone hold the key in the start postion while you test starter, the back of the starter seliniod you will see two connections, one is a big connection with a battery cable going to it, that cable should have power at all times then theres a small connection next ti the big one with a small wire, thats the trigger wire that should have power when key is in the start postion, if theres power to both then replace the starter and thats the starting problem. good day.

Check all wires running to battery. Check the battery ground(black) cable for sure. Make sure it is getting a good ground. If necessary unbolt the ground and clean up with a wire brush or wheel.

You said you changed the ignition switch. You changed the switch or the ignition lock cylinder? I've seen cars also do this after a remote starter has been installed but you said you nothing like that on your car.

The first thing to do is to check for power at the starter, the big wire should have power at all times then have someone turn the key and hold it in the crank postion and test for power at the small connection at the starter if theres power then you have a bad starter, if theres no power then check the ignition swith and the wiring to in and see if it throws power in the crank spot and last if that checks out check the neutral safety switch, make sure power is flowing through that in park or neutral.

Check and clean, if necessary, your battery terminals - and then make sure they're tight and secure. I had this happen once with an old Subaru: everything electrical worked (although the lights were very dim, wipers were sluggish, etc.), but the problem turned out to be loose and dirty battery terminals. Started right up after that. . .

disconnect the negative battery cable and install a test light -one end on the negative post and the other to the disconnected cable. if it glows brightly, you have a big drain. Have someone watch the light while you pull all fuses 1 by 1. When the test light goes out as a certain fuse is pulled -see what that fuse goes to and there is your problem.

use a test light and see if power is going to the coil. if yes then use a spark tester from a auto parts store. it will have settings for your vehicle. if the spark is not big enough it's just the same as not having one. then change the coil. if you don't get power before the coil have the ignition control modual checked. if bad replace it. good luck.

try to check if the starter relay clicking while you start.If no maybe bad connection from ignition key. If the relay clicking maybe the connection to starter or the starter itself is damaged. try to direct the sol. of starter to batt. positive if it kick your starter is good.