It's not feasible.
any alternator is under tension, so it needs to have one of the rails disconnected before you can test it off the car.
given that electricity cannot travel through air with relation to earth, it's also necessary to have two people move in tandem with respect to each other when operating an alternator, or else there will be no voltage whatsoever. quite simply put its just too dangerous without a helper always close by in hazardous areas. given this information i recommend calling a mechanic before having any sort of testing done on your charging system thank you for reading
can you test an alternator off a vehicle?
yes, you can test an alternator off a vehicle. to do this however, you will need to buy the testing equipment first
to test for alternator voltage, first make sure that the battery is topped up with water and it's charging correctly with a voltmeter or by jumping the car on the side of the road. measure both yellow secondary output voltage (typically 16-19 volts) on pins 14+15 of connector j5 which runs from power module a to fuse box a. if there is voltage at pins 14+15 then jump to step 3 below if not, disconnect connector j6d2 on power module a side then measure across input wire harness connectors where they are soldered onto pc board and check these wires
how do i test if an alternator is removed?
there are two ways of testing if an alternator is removed.
• with a multimeter, connect the meter to terminal 17 on the battery and hold it against each connector on the alternator starting with terminal 1 then 2 then 3 etc. if volts are detected at any point that means that either the wires are connected wrong or that there was no alternator connected in the first place.
• on some newer model vehicles, you can take out one serpentine belt to feel if resistance has been lost. if there is no resistance while you pull, this indicates that the engine would not be getting enough power for anything inside it – including your battery!
if these tests come back positive, it might be time for new parts.
how do you bench test an alternator with a multimeter?
test ammeter on multimeter for voltage of charging system. put “+” lead of multimeter on the negative terminal on the battery and “-” lead on ground or engine block). if ammeter reading is not zero, but it's less than .08 amps (watts), adjust regulators/coil to get readings of .08 amps or more.if ammeter reads exactly zero, test voltages with + wire of charging test probe between battery (+) terminal and regulator (-) head; then put – wire between regulator head (-) terminal and ground (or engine block); if no reading shows up in volt meter, check fuses before replacing alternator.
check voltage at battery positive terminal while cranking engine with
what is the easiest way to test an alternator?
to test an alternator, you can perform a voltage drop test, which tests for resistance between each of the connections (between the field coil and the output wire of the alternator). this is done by connecting one end of a set of jumper cables to one dangling wire on the alternator's output terminal, then touching that wire with an alligator clip. finally, touch two ends of that same length cable to an outlined ground inside the engine compartment.
if there are any resistances in its wiring, blue sparks will shoot out from your clips. these three conditions need to be met before you do this test: 1) your car has spark plugs installed 2) you have gas in your tank 3) you have electricity flowing through