Yes. That causes a voltage spike which is very harmful to the computers.
Not really it depends on what type of car it is Yes it can. Unhooking the cable with the engine running can cause a voltage spike from the charging system, which can do serious damage to the electronics on the vehicle.
remove neg.cable.then positive cable cable from starter,remove male to female wire ,then remove 2 bolts holding starter to engine.
No
If you have a DVOM, test for voltage at the positive battery cable at the battery, not testing at the battery but at the cable, when the engine is running. Now check for power at the battery post with the engine running, should be the same. Next test the battery when the engine is not running, key off, yes, this time testing for voltage at the battery post and cable, should be the same. If all four test voltages are the same, you have a charging system problem. The test at the battery cable when the engine is running should be aprox 13.5 to 14 volts at the cable. One thing to keep in mind, corrosion at the + battery cable can prevent the battery from charging and that's why the test for the charge system when the engine is running is best at the cable not the battery. If you have different readings when the engine is running at the cable and battery post, (the battery test results are the same when running and when not running, but the battery test at the cable is 13.5 to 14 volts) it is probably a corrosion problem. Clean the corrosion between the + battery cable until the voltages are the same at the cable and battery post. This is not a thorough test for the battery condition as you are only checking volts, not amps.The cheapest way is to just take it to any Autozone , or similar parts stores ! They have the equipment on hand , AND they check it for FREE ! They will be able to tell you if you have a bad battery or faulty alternator . Most of these places are honest and tell you what if anything you nedd to replace . I thought I had a bad alternator a while back . Took it in and tested it . The battery had a bad cell in it .So no need to buy the fancy equipment . Hope that helps !
The engine should continue to run... if and only if the alternator is putting out enough electricity to keep the onboard computer and other necessary electrical engine parts up and running.
Yes, and disconnecting the battery while the engine is running can severely damage the computers
Charge the battery overnight and have it load tested at a parts store...its free. Or carefully remove the positive (red)cable while the engine is running. If it quits then its your altenator.
Remove the accessory drive belt. Disconnect the negative battery cable. Disconnect the generator electrical connector. Remove the engine harness terminal from the generator: - Slide the boot back along the cable. - Remove the engine harness cable nut (3). - Remove the engine harness terminal from the stud. Remove the generator bolts and generator. Install the generator. Install the generator bolts. Tighten the generator bolts to 50 N
Remove cables from battery Remove + cable from the starter solenoid Remove the - battery cable from engine ground install new cables using the same routings as original
You could have a bad fuse, or a bad fusible link. However, you could have fried the computer or the voltage regulator, or any number of other things by trying that. When dealing with a vehicle younger than an 80 model, you should never remove a battery cable while the engine is running. When you remove a battery cable while the engine is running, the alternator starts charging wide open. The voltage on the electrical system can get up as high as 40 VDC! That's a little too much for the electronics in today's cars.
I hope you did not remove a battery post while the engine was running (don't do it)? If so, it may cause damage to your alternator, and it will short out your ignition in the engine (engine stops). If there is no damage, it should work after reconnecting the battery posts. If you didn't do the above situation, I would check for a loose connection on the terminal or a corroded/broken cable. I hope you did not remove a cable from the positive or negative battery posts while the engine was running (don't do it)? If so, it may cause damage to your alternator, and it will short out your ignition in the engine (engine stops). If there is no damage, it should work after reconnecting the battery posts. If you didn't do the above situation, I would check for a loose connection on the terminal or a corroded/broken cable. THe computer may need alittle time to relearn idle.
Yes This Cable Is Connected To A Group Of Cables That Run To The Battery Positive Side, To Allow The Alternator To Charge The Battery.,Do Not Remove Or Install An Alternator Until You Remove The Ground Terminal From Your Battery.