The service engine light on a 1995 Land Rover is reset by connecting an OBDII code reader to the vehicle's computer. It can quickly and easily rest the light.
The service engine light has to be reset with a scanner. Disconnecting the battery will not work. The light will come back on unless you make the necessary repairs.
Try disconnecting the battery for 10 minutes. May reset the light--if problem persists light will come back on
you need to flash the computer,
TAke it to the dealer. They have check out charts for times when the computer doesn't set codes.
It's the " service engine soon " light to the left of the gas gauge instead of the " check engine " light , like it is on my 1995 Ford Explorer
Use a diagnsotic code scanner to find out why the light is on, repair the problem and if the light doesn't go out after the problem is solved, it should after the engine has been started about 3 times.
If the problem has been corrected, you can clear the codes by disconnecting the ground cable from your battery for at least 10 seconds. After being repaired. if your Blazer has the OBDII system it needs to be cleared with the scan tool. The procedure above works for the OBDI system.
You can find a diagram for the vacuum system in a 1995 Blazer 4x4 will be located in the Blazer service manual. The manual can be purchased in most auto parts.