Without the power from the alternator, your ignition system will have to depend on the battery for electrical power. If the alternator is not working, the battery will fail very quickly and the car will stop running. If you suspect that the alternator in your Montero Sport is not working properly, you can replace it or remove it and have it tested; most auto parts stores will test the alternator for you free of charge if you bring it in.
Remove the negative battery cable from the battery with a wrench. Lay the cable aside and locate the alternator on the front of the engine.
Remove the adjusting bolt at the top of the alternator with a wrench or socket and ratchet. Loosen the lower mounting bolt and push the alternator toward the engine to loosen the belt. Remove the belt from the alternator.
Locate the wiring harness connections on the rear of the alternator. (There are two of them, a ring connector on the “B” terminal and a plug in connector.) Remove the ring connector, using a wrench, then unplug the second connector by pushing the locking tabs on the connector and pulling it free of the alternator.
Remove the mounting bolts from the alternator with a socket and ratchet, then lift the alternator out of the engine compartment. Position the new alternator in place and install the lower mounting bolt. Leave the bolt loose.
Install the upper adjusting bolt and leave it loose. Attach the two wiring harness connections on the rear of the alternator, then tighten the bolt on the ring connector with a wrench. Ensure that the second connector is secure.
Slide the drive belt onto the alternator pulley and pull the alternator out away from the engine. Tighten the adjusting bolt with a wrench once the belt is tight. Tighten the lower mounting bolt with a socket and ratchet.
Install the negative battery cable on the negative post of the battery and tighten the bolt with a wrench or socket and ratchet. Start the engine and verify that the belt is correctly running over the pulleys. Check to see that the alternator is charging as well.
