My blazer will not start, the lights come on cd player works but when you go to turn the key over it does not make the clicking sound so i know its not the battery. But why won't it turn over and start?
This issue happens a lot with these vehicles.
What you may want to do is this; Put your key in the 'Run' Position, not 'Start', and press on the Brake, then move the shifter all the way towards the back, so the red marker is on the '2'. Then, remove your foot from the break, and then move the shifter all the way back to the Park position. Next switch your key back to the 'Off' position.
Now, try to start your car.
If it starts, the issue was that you did not have the shifter all the way in the Park position. If it does not want to start, check your fuse box and see if you have a blown fuse. (Make sure if you replace a fuse that you replace it with the same type and rating).
If the fuses look OK, then you may have an issue with the starter solenoid. Turn the key back go the Off Position, slowly turn the key to the On Position, slowly. Listen carefully. You should hear at least a 'click'. This is the solenoid engaging but not turning. If you hear that click, then turn the key to the Start Position. If it doesn't turn over, the issue may be with the Starter.
Fortunately, the Starter has the Starter Solenoid attached to it and it normally comes as one unit. There are two bolts that hold the Starter in place. Make sure, if you are going to change out the Starter, that your remove the Positive Battery Cable from the Battery. The Positive Battery Cable goes directly to the Starter. If you don't remove that cable from the Positive Battery Post/Terminal, you may cause an arc under the engine. Trust me, you don't want to do that.
Let me know if that helps..