Can a bad alternator leave a Jeep Wrangler without power?
A bad alternator can leave your Jeep Wrangler without power and unable to move. Alternators don’t always go bad in the exact same way. We’ll cover the symptoms of when an alternator goes bad, and how to diagnose a bad one (which is really pretty easy).
Is there a problem with the alternator in Liberty?
Discussion in ‘ Liberty ‘ started by jonahb1987, Jul 10, 2019 . I recently had a breakdown. At first we thought it was the alternator, so I bought a new one. Had it installed at a mechanic and the same problem would happen. After being jumped, it would start but putter out in like 4 minutes.
Can a bad alternator cause a car to not start?
Once this battery reserve hits a certain level, the vehicle will begin to run erratically and will no longer start when the key is turned. Often, the battery light will come on, the alternator gets replaced, and then a few days later the vehicle dies.
Where are the fuses on a jeep alternator?
If you don’t see voltage on the field coil terminals, you might have a blown fuse. The field coil is powered by a box called Powertrain Control Module, and there are 3 fuses that might be of interest, numbered 6, 19, and 26 according to the schematic (see below).
A bad alternator can leave your Jeep Wrangler without power and unable to move. Alternators don’t always go bad in the exact same way. We’ll cover the symptoms of when an alternator goes bad, and how to diagnose a bad one (which is really pretty easy).
How do you remove the alternator belt on a Jeep Cherokee?
Do not remove the belt completely unless you’re replacing it. Some older Jeeps may have an alternator pivot bolt to loosen and then pivot the alternator on the bracket to relieve tension on the belt. Remove the two alternator mounting bolts using a ratchet wrench. Unsnap the B+ terminal cover if equipped on the back of the alternator.
Why does my alternator not charge my battery?
If this sensor tells the PCM that the battery is too hot, the PCM might refuse to power the field coil ’cause it thinks bad things might happen if the alternator tries to charge an overheated battery. Was this answer helpful?
If you don’t see voltage on the field coil terminals, you might have a blown fuse. The field coil is powered by a box called Powertrain Control Module, and there are 3 fuses that might be of interest, numbered 6, 19, and 26 according to the schematic (see below).
What should I do if my alternator blew up?
You need to go to the shop manager or store manager for resolution. You should not have to pay for any parts or labor for the new alternator. Hooking up the battery incorrectly blew the alternator. As to other problems, radio etc., you need to get the manager to agree that these were affected as well.
Can you have too much amperage in an alternator?
You can never have too much amperage when it comes to alternators; therefore, you never have to worry about choosing an alternator with too high of a rated output. Here’s why:
How can you tell if your alternator is bad?
The battery stores enough voltage to be able to start the engine without the assistance of an alternator. It is turned by a serpentine belt. It’s worth noting that a bad serpentine belt can cause the alternator to stop charging effectively. It’s pretty easy to tell if one is bad. It’ll look dry rotted.
You can never have too much amperage when it comes to alternators; therefore, you never have to worry about choosing an alternator with too high of a rated output. Here’s why:
How to know if you need to upgrade your alternator?
There are a few ways to figure out whether you need to upgrade your alternator. A few telltale signs are dim headlights, poor stereo system performance, or an alternator that simply wears out quickly.
Can a mismatched pulley and alternator cause a problem?
A mismatched pulley ratio and alternator can lead to big problems, especially at idle where alternator performance is critical. That’s because these high-amp units typically lose output under 2,400 rotor rpm.
What to do if your Jeep Wrangler is stalling?
If you hear something odd coming from your car engine, you ought to take it over to your dealer or mechanic. One more Jeep issue to point out involves the throttle position sensor. Sudden engine stalling, sudden surges in speed, and even violent jerking of the vehicle indicate that the TPS is in danger.
What does it mean when your alternator is not charging?
If the alternator is not charging the battery, you will have a red “ALT” or “charge” sign on your dashboard. This means that your battery is no longer being supplemented for power by the alternator. You will need to recheck the wiring because the light could also be faulty.
How can I tell if I have an alternator problem?
To differentiate an alternator problem from the battery, you will need to use a voltmeter to check for voltage. First, turn off the engine and check the battery voltage. A fully charged battery should have a reading of 12.65 volts. Next, turn on the engine and recheck the voltage. You should have a reading of 13.5 to 14.5 volts.
Can a bad alternator cause a bad PCM?
If these are all good, then you need to check the wiring between the PCM and the alternator, or the PCM itself may have a problem. Another possibility is a bad Battery Temperature Sensor.
Why is the alternator on my Jeep not charging?
Looks like the field coil of the alternator isn’t getting power. There are 3 wires attached to the alternator. One is a big fat wire that goes to the battery, this is the alternator output. The other two wires feed power to the field coil.
What should I do if my alternator wont charge?
Be careful to avoid getting caught by the alternator belt! With the engine running, there should be voltage across the terminals. Turn on the headlights to put some load on the battery, the voltage on the field coil should rise slightly. If you don’t see voltage on the field coil terminals, you might have a blown fuse.
If these are all good, then you need to check the wiring between the PCM and the alternator, or the PCM itself may have a problem. Another possibility is a bad Battery Temperature Sensor.