What do you look at when a 1995 Chevy Blazer battery light comes on above idle the amp gauge reads 18 volts and car cuts out?

1. Check the battery. The battery light coming on above idle could indicate a problem with the battery itself. Check the battery terminals to make sure they are clean and free of corrosion. If they are corroded, clean them with a wire brush and baking soda. Also, make sure the battery is properly secured in the battery tray.

2. Check the alternator. The alternator is responsible for charging the battery. If the alternator is not working properly, it can cause the battery light to come on and the car to cut out. Check the alternator belt to make sure it is in good condition and properly tensioned. Also, check the alternator connections to make sure they are clean and tight.

3. Check the voltage regulator. The voltage regulator controls the amount of voltage that is sent to the battery. If the voltage regulator is not working properly, it can cause the battery light to come on and the car to cut out. Check the voltage regulator connections to make sure they are clean and tight.

4. Check the wiring. There could be a problem with the wiring that is causing the battery light to come on and the car to cut out. Check the wiring for any loose or broken connections. Also, check the ground wires to make sure they are properly connected.

If you are not able to find the problem yourself, you should take the car to a qualified mechanic for diagnosis and repair.