Replace a Power Control Module on a Jeep Grand Cherokee

Replace a Power Control Module on a Jeep Grand Cherokee

Replace a Power Control Module on a Jeep Grand Cherokee : Multi-thousand tips to make your life easier.

If you own a Jeep Grand Cherokee, there is a good chance that you will find yourself changing its Power Control Module (PCM) sooner or later. Almost all cars have their own flaws and weaknesses, and for the Jeep Grand Cherokee, it is almost always the PCM that has to be repaired or, worse, replaced. Some symptoms of a broken PCM are that the Jeep won't start, it won't shift gears, its fuel gauge appears empty although the tank is filled with gas, and so on. When any of these symptoms occurs, call your car dealer to confirm whether the problem is really with the PCM.

If your PCM breaks, you do not have to have it fixed at expensive repair shops. With the right tools and knowledge, you can save a lot of money by doing it yourself at home. Just follow the simple instructions below on how to change or replace a Power Control Module on your Jeep Grand Cherokee.

• Locate the PCM. The location of the PCM changes depending on your Jeep model, but it is always under the hood and near the fender. For example, the PCM of a 2003 Jeep Grand Cherokee is positioned just behind the coolant tank on the passenger side of the vehicle. To be sure, check your owner's manual for the PCM location. Remember that whatever model you have, its PCM will have wires connected to it.
• Choose a brand-new or at least rebuilt PCM. Buying cheaper items does not always lead to savings. In fact, you may end up spending more over time. So when buying a replacement PCM, do not buy refurbished PCMs, even though they are worth a lot less than new ones. If you are lucky enough, a refurbished PCM may last up to a year, but that is the maximum. Look for a new PCM or, at the very least, a rebuilt PCM. You would not want to change your PCM every six months or more often. Needless to say, purchase a PCM that is compatible with your Jeep's model.
• Be safe. Before you remove the old PCM, make sure the vehicle is not turned on. The safest way to do this is to remove the car key from the ignition. While you do not have to remove the Jeep's battery, you must ensure that no electric power flows to the PCM. It is better to be safe than sorry.
• Remove the old PCM. To remove the PCM, you only have to follow a two-step procedure. First, unplug all the wires connected to it. Second, remove all the mounting bolts attaching the PCM to the Jeep.
• Replace the old PCM with a new one. To install the new PCM in the Jeep, simply reverse the two-step procedure in the preceding paragraph. First, bolt the PCM down to the vehicle. Once the new PCM is attached securely to the Jeep, plug in all its connecting wires.

Now your Jeep Grand Cherokee is once again ready for off-road tracks.