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I would say no to reg or alt ,when you apply brakes there is dimming and that sounds like a negitive grounding problem not at battery,the dimming is caused from a back feed of ground possible.there are what are called body ground straps from battery to body panels and frame.as far as bat or alt advanced auto and most auto parts stores will be glad to check them out for FREE ,good luck
The red light flickering could be a diode fault within the alternator. Pulsating could also be a fault with the alternator or a faulty ground/earthing point for either the battery or the harness. If your drivebelt tension is fine, its more than likely the alternator.
Hope this helps...
IT COULD BE A BAD ALTERNATOR. JUMP START THE CAR, REMOVE THE JUMPER CABLES, PUT A VOLTMETER ON THE BATTERY. MOTOR RUNNING, VOLTAGE SHOULD READ 13.90 TO14.80. IF IT READS 13.00 OR LESS OR THE VOLTAGE STARTS DROPPING, THE ALTERNATOR IS NOT CHARGING. BEFORE BUYING AN ALTERNATOR, GET A GOOD FUSE TESTER, CHECK EVERY FUSE,, FUSEBOX UNDER THE HOOD & THE FUSEBOX INSIDE THE VEHICLE. IF ALL FUSES CHECK GOOD & BATTERY VOLTAGE IS LOW WITH MOTOR RUNNING, THE ALTERNATOR MUST BE BAD.
E.C.M control injector pulsation, with key on check for voltage at injector harness, then reverse test light at battery and check for ground at the other wire at injector harness, crank engine ground should have pulsation if none bad E.C.M,good luck,hope this was very helpful.
sounds like the alternator is shot and is not supplying sufficient power to the engine or even enough to charge the battery, try replacing it, and you said the dash light for the alternator is on so its most likely the alternator
The alternator can be checked once you have the vehicle running. If you have a battery charger, charge the battery first. If not find a known good battery to jump start the Jeep. If it starts most likely bad battery, espically if it is the original one on 2004. Drive to your local auto parts store, they have a meter to check your battery and alternator. Make sure they check the batteries cranking amps, and most good alternators with engine running will put out approximately 14 volts. God Bless
your car is in denial.... Have your battery load testest. If it has any plate issues it can mislead the alternator regarding its state of charge abd, by all means make sure your battery cables are clean and tight. good luck
sounds like it's your alternator, your alternator charges your battery and runs car once it is started. if you have a bad alternator your battery light will come on, and shortly after your vehicle will die, unable to restart without a jump. I would take your battery to autozone or an auto shop to have your battery and alternator tested.