How to Replace the Alternator on a 1998 Isuzu Trooper

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This step by step guide will show you how to remove and replace the alternator in your 1998 Isuzu Trooper. In this post you will know all the requirements and necessary steps regarding how to replace the alternator on a 1998 isuzu trooper.

How to Replace the Alternator on a 1998 Isuzu Trooper

This vehicle repair will take four to six hours depending on your skill level. Asking a friend for help will speed up the process.

Isuzu Trooper 98 - 99
Isuzu Trooper 98 – 99
  1. Have a mechanic or auto parts store check that the alternator is bad before deciding to change it.
  1. Purchase the correct alternator for your Isuzu vehicle, remove the wrapper and any other accompanying packaging, store it in a box until ready.
  1. Park the vehicle on a level surface and wait for the engine to cool down.
  1. Open the hood.
  1. Using a wrench and jaws, remove the ground terminals, first (-) to ground, then (+) to ground.
  1. Remove the battery, battery bar mounts.
  1. Using a wrench, pull the auto tensioner pulley to the loose side (towards the driver’s side) and remove the serpentine belt.
  1. Remove the intake coolant hose from the engine intake and secure it with zip ties to the hood rod. Some refrigerant spillage will occur. Make sure to hold it tight to reduce spillage.
  1. Using a 10mm open-end wrench, remove the nut and connection above the positive (+) connector on the alternator. There may be a red rubber cap, slide it off before removing the nut.
  1. Using the socket wrench, remove the three bolts from the alternator cover. The alternator cover is a curved plate located under the alternator that protects it from debris and connects it to the engine.
  1. Using the socket wrench, remove the last mounting bolt from the alternator. This bolt allows the alternator to rotate in place for easy mounting of the alternator cover plate.
  1. Carefully remove the alternator cover and adjust it so that the rear connection cable is visible. Set the alternator cover aside for later.
  1. Using your fingers, you may or may not be able to pinch the wire clip and disconnect it from the alternator. If not, use the jaws to squeeze the clip and remove it from the alternator female connector.
  1. Carefully lift the old alternator between the engine and fan blades.
  1. Before you know how to replace an Isuzu Trooper alternator, remove the positive terminal nut and keep it in your pocket for later.
  1. Lower the new alternator onto the engine and connect the male wiring clip to the rear female end of the alternator.
  1. This is probably the most difficult step; mounts the new alternator of the Isuzu Trooper 1998 on the alternator mount. If the alternator bracket is tight, it may be necessary to use the wood and hammer to gently tap the alternator into place. The mounting holes must be almost perfectly aligned so that the casing bolt can go through and thread into the end.
  1. Once the housing bolt is in place, you should be able to rotate the alternator back and forth. Reinstall the alternator cover plate by first attaching it to the alternator, then rotating it to insert the last two bolts.
  1. Tighten all the bolts that hold the alternator.
  1. Connect the positive (+) terminal to the alternator and the cover with the nut and the rubber sleeve.
  1. Reconnect the coolant hose to the engine.
  1. Reinstall the serpentine belt.
  1. Reconnect the battery first, the rod holders, and the positive (+) and then negative (-) battery terminals.
  1. After starting the engine, return to an auto parts store to have the alternator tested to verify that everything is in good shape.

Now that you know how to replace the alternator on a 1998 Isuzu Trooper, don’t forget to take the necessary precautions for a successful alternator replacement.

Isuzu Trooper
Isuzu Trooper

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This step by step guide will show you how to remove and replace the alternator in your 1998 Isuzu Trooper. In this post you will know all the requirements and necessary steps regarding how to replace the alternator on a 1998 isuzu trooper.

How to Replace the Alternator on a 1998 Isuzu Trooper

This vehicle repair will take four to six hours depending on your skill level. Asking a friend for help will speed up the process.

Isuzu Trooper 98 - 99
Isuzu Trooper 98 – 99
  1. Have a mechanic or auto parts store check that the alternator is bad before deciding to change it.
  1. Purchase the correct alternator for your Isuzu vehicle, remove the wrapper and any other accompanying packaging, store it in a box until ready.
  1. Park the vehicle on a level surface and wait for the engine to cool down.
  1. Open the hood.
  1. Using a wrench and jaws, remove the ground terminals, first (-) to ground, then (+) to ground.
  1. Remove the battery, battery bar mounts.
  1. Using a wrench, pull the auto tensioner pulley to the loose side (towards the driver’s side) and remove the serpentine belt.
  1. Remove the intake coolant hose from the engine intake and secure it with zip ties to the hood rod. Some refrigerant spillage will occur. Make sure to hold it tight to reduce spillage.
  1. Using a 10mm open-end wrench, remove the nut and connection above the positive (+) connector on the alternator. There may be a red rubber cap, slide it off before removing the nut.
  1. Using the socket wrench, remove the three bolts from the alternator cover. The alternator cover is a curved plate located under the alternator that protects it from debris and connects it to the engine.
  1. Using the socket wrench, remove the last mounting bolt from the alternator. This bolt allows the alternator to rotate in place for easy mounting of the alternator cover plate.
  1. Carefully remove the alternator cover and adjust it so that the rear connection cable is visible. Set the alternator cover aside for later.
  1. Using your fingers, you may or may not be able to pinch the wire clip and disconnect it from the alternator. If not, use the jaws to squeeze the clip and remove it from the alternator female connector.
  1. Carefully lift the old alternator between the engine and fan blades.
  1. Before you know how to replace an Isuzu Trooper alternator, remove the positive terminal nut and keep it in your pocket for later.
  1. Lower the new alternator onto the engine and connect the male wiring clip to the rear female end of the alternator.
  1. This is probably the most difficult step; mounts the new alternator of the Isuzu Trooper 1998 on the alternator mount. If the alternator bracket is tight, it may be necessary to use the wood and hammer to gently tap the alternator into place. The mounting holes must be almost perfectly aligned so that the casing bolt can go through and thread into the end.
  1. Once the housing bolt is in place, you should be able to rotate the alternator back and forth. Reinstall the alternator cover plate by first attaching it to the alternator, then rotating it to insert the last two bolts.
  1. Tighten all the bolts that hold the alternator.
  1. Connect the positive (+) terminal to the alternator and the cover with the nut and the rubber sleeve.
  1. Reconnect the coolant hose to the engine.
  1. Reinstall the serpentine belt.
  1. Reconnect the battery first, the rod holders, and the positive (+) and then negative (-) battery terminals.
  1. After starting the engine, return to an auto parts store to have the alternator tested to verify that everything is in good shape.

Now that you know how to replace the alternator on a 1998 Isuzu Trooper, don’t forget to take the necessary precautions for a successful alternator replacement.

Isuzu Trooper
Isuzu Trooper

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