You won’t have any trouble diagnosing the faulty regulator rectifier if the battery is the cause. Turn the headlights and heater on and it would go back to normal and stay there. One Test Is Not Enough If only battery voltage is present at the battery on a running engine, does this mean the alternator is “bad?” No, it does not. 8L. Battery Overcharging/Battery Dead after Sitting discussion in the Ford forum at Yesterday's Tractors. Bought a new battery ran fine for a week or so then same issue occurred. If the ignition relay shorts, burns out, or otherwise fails while the engine is operating it will cut off power to the fuel pump and ignition system. 8 with the car running anything higher than 14. Other common symptoms of an overcharging alternator include frequent fuse blowing and battery abnormalities, such as swelling and cracks due to gas buildup. Anything lower is a bad alternator. Outside of the battery warning light, a dead battery is the most common symptom of a bad alternator. I Have A 2004 F150 With. Step 3 - if battery voltage is present,replace. While running the car, note the brightness of the interior lights. Start the engine. Its a delco remy 12si 66A which is a very good alternator so I decided to have it rebuild. The pulsing is. 1999 Ford Escort. The regulator shown in the picture is the correct regulator for the early 55 amp alt. Most alternators are air-cooled. The alternator is making 18v. 1998 Nissan 200SX SE-Blue. 8 volts. Alternator Replacement. As a rule, the key-off current drain on most late-model vehicles should be less than 50 milliamps (mA). YMMV. Alternator. I Have Switched The. To test the charging system, connect the black meter lead to the negative battery terminal and the red meter lead to the positive battery terminal. Reason 1: Bad Alternator or Broken Alternator. 3. Reply Quote. #1. 2 and 14. SHOZ123. (800) 853-2651. Watch the volt drop while you have lights,heater fan turned on engine not running. #4 · Aug 7, 2013. For the easiest alternator test, simply turn on the headlights to your lawn mower or outdoor power equipment. 8 and up to 16. Joined Apr 12, 2002. As the alternator begins to charge the battery, it should be between 14. 28 volts and green field lead is 1. Use a multimeter to verify that there is no power draw. It's coming from somewhere else. If not, check your belts to make sure they are tight and rotating the alternator properly. 3L Power Stroke Diesel - Alternator Over Charging - Hi Everyone, I looked in past threads and found alot of alternators failing to charge but my problem is my alternator at idle charges fine but as I increase the rpms it will top out at around 17 volts @ 2000 rpm. 2) Your Battery Is Thirsty! 1. This surge disrupts the wiring in the alternator, causing an overcharging condition. Any reading more than 15 volts warrants further investigation, while. 2002 GMC Sierra SLT LB Z71-Red. The state of charge of the battery. Penny, If battery is indeed good, you are experiencing what is known as a parasitic drain of battery. 0. like there is a dead spot right there at that point. Wire the other side to a nearby ground. The 12 volt battery is a vital component of the starting system in Chevy Avalanche. Voltage Regulator, Alternator Amd Checked Wiring Harness Water. Start your vehicle and open the hood. A blown alternator fuse can cause your vehicle to exhibit several symptoms, such as a dead battery, dim lights, illuminated warning lights, and other electrical oddities. 5 to 2 volts higher than battery voltage. I'm pretty sure I know the answer to this but figured I'd throw this out anyway. Slow crank is usually the first symptom of a dying battery. February 23, 2010. Let’s explore the reasons and how to fix the alternator not charging the battery. This indicator isn’t for the battery itself but points toward a charging system defect. If the ground wire becomes loose, corroded, or sustains other damage, it will introduce abnormally high resistance into the circuit. Any acid fumes or liquid that makes it out to the caps and over to the lead terminals reacts and forms all the crud. 0 alternator overcharging - Hi, my 2009 Escape, 3. Didn't work. M. Last resort, new alternator. BATTERY OVERCHARGING: dusty wonka: Workhorse and Chevrolet. The battery is acting like an electrical sink. Simply check the voltage of your battery by touching the multimeter prongs to the terminals with the car shut off. 9. Your battery should be at about 12. . 6 to 13. Truck wonk crank. Truck overcharging. Scanner said it was overcharging at about 15-17v. If the relay shorts it can leave power on to the computer, even when the vehicle is turned off. Without them, a car cannot move. ruled out bad batteries. Leave the other unplugged. 7 or so. 1999 - 2003 7. Use a ohm-meter to check your battery and alternator, not the dash gauge. My truck is a 1500. The two primary causes for a battery to deplete are parasitic power loss or a faulty battery. Check the ground cable between the engine and the body. 8. If there is too much sulfation, the chemical. Voltage Drop Test Resources. Also, the presence of excessive corrosion can contribute. A burning smell. Once all the modules go to sleep, the current drain drops significantly. The average cost for Ford Escort Alternator Replacement is $416. My alternator seems to be overcharging, and when I say overcharge I mean like 17+ volts, no lie. It is also my understanding that the ECM is controlling the alternator voltage. Instructional repair video. 38. A collision will make the plate at the contact point stuck, so the contact cannot be switched. as the battery gets closer to charged the voltage will slowly drop down to around 12. Compare with voltage at VR regulator plug (unplugged) . 7v. Tested battery it came up bad and showed alt was overcharging, almost 16v, sooo put a new. Provides power for all of the truck's electrical systems while the engine is running. It is important to note that the alternator, despite its role in charging the battery, is not typically considered a source of parasitic battery drain. Slow engine crank. This is because the excess voltage can cause the battery to overheat and lose its charge. Symptom 1: High voltage reading from the alternator when the engine is running. ) Note that says "battery voltage sense" singular. If the voltage displayed is under 13. If there's too much of a difference (too low), you have too much resistance in the circuit and it'll adjust the voltage out of the alternator too high. Mike Youngquist 4 posts since Jul 22, 2020 Re: p3 cascadia overcharging Dec 15, 2020 7:29 PM when the overlay was done the wire was just spliced in a few inches from the connector. Short Circuits or Electrical Components: These devices like headlights, relay switches, the trunk, under-hood or glove lighting, and computer module cause parasitic battery drain as they remain energized. Sometimes your battery has simply. 2005 3. The alternator is going to be weakened by this heat; either the soldered joints, insulation, etc. Ford Escort 1999 Sohc 4 cyl. 28 volts/14. However, is it an alternator or battery problem? The battery delivers a high voltage to. If so, defective battery -- or possibly the top of the battery has so much conductive dirt on it that it's discharging it - if so, just clean it off. Video: The Sound of a Dead Battery. 025 amps). Alternator voltage, measured at the battery, is normally between 13. That only means that the alternator is not charging, but. A couple of problems, the alternator is primarily designed to maintain charge in the battery as power is consumed by the vehicle. I have 4 AGM batteries in my rig with a total capacity of 440AH (actually 880AH @ 6V, but of course they are wired to get 12V). Since then if I park it for more than a week batteries are dead and I have to jump start it. Probably a faulty alternator. If your battery dies, you will need to tow your car to a repair shop. This can happen if the charger is left on for too long, or if the wrong kind of charger is used. . Charging System Troubleshooting. 7, higher than expected. I've tested the battery and alternator, and they. Alternator tries to compensate for the dead battery. If I disconnect the alternator lead to the battery will this stop the drain? I am getting 2. USUALLY when the regulators go bad they either open up (most common) so you get no charge or Short and charge upwards of 17-19 volts. But as a rule, the key-off current drain should usually be less than 50 milliamps one hour after the engine has been shut off and left undisturbed. 5 volts for an extended period of time. I've tried 4 different regulators, one solid state, which shorted out and left me with a 2 amp draw,Only runs about 70 to 80 miles then dies. A battery light on the dashboard. 15 v seems to be the magic number for overcharging. Battery is less than one year, cables and terminals replaced then as well. This can be caused by a number of things, including a bad alternator, a loose alternator belt, or a problem with the battery itself. It can result in the battery swelling up or losing electrolytes. If the car alternator is not charging the battery while the car engine. So i took it to autozone to check the battery as a dead cell would cause the regulator to pump out more juice to keep the battery charged. Both times I didn't have a voltmeter to check the voltage at the battery to confirm the reading, but the problem went away after not running the engine for. If I disconnect my battery it does not go dead. Also put in new battery at that time as. 1) You May Not Be Fully Charging Your Battery 1. June 26, 2014, 12:42:29 PM. Something like 20 minutes after idling the voltage was down to 13. 66V/cell (15 and 16V on a 12V mono block) for about 24 hours. the alternator send the output back on another line to charge the battery. Images: 1. V8. The most common causes of dead battery in Sierra 1500 are internal degradation of the battery due to old age, and bad alternator – but can also be caused by parasitic draw, and if the vehicle has been parked for a long time. Symptom B: Erratic Engine Performance. It’s best to avoid driving without an alternator if possible. I do have the old battery still. Yes, a faulty ground connection can cause an alternator to overcharge. Yes,it is,the alternator is charging to much,this can lead to other component failures. Swollen battery: A bloated car battery is often the result of alternator overcharging, and it should be replaced. The alternator is responsible for keeping the car on after the battery does its initial job. Then I switched to the other battery and charged for several hours. I ensured no lights were on or doors left open. 8 volts. 2 and 14. A new alternator fuse can cost. 7: A Dead Battery. 1. The battery can swell from the side or top of the battery. If there is, track down the power drawing accessory or short circuit. A bad voltage regulator can lead to the alternator undercharging or overcharging the car’s battery. Common Trouble Signs. The alternator relies on having a clean, secure ground path in order to properly regulate its voltage output. If not mechanically inclined have the alternator replaced.