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How do you check amperage draw on electrical devices 12v DC automotive?
Wiki User
∙ 14y ago
connect an ampmeter in series between the power source and the device
ex. remove the power + wire and fit the ampmeter between the + wire and the device
alternitively you can get clamp on ampmeters they are dearer but you can test amps with out removing any wires they just clamp on over the wire and give you an amp reading
Wiki User
∙ 14y ago
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"Checking" Car AlternatorsIn my area [SE Texas] all of the national chain [Autozone, O'Reilly, and Advance for example] automotive parts stores have hand held portable test devices which they attach to my car in their parking lot. They do not charge for these services; they are free.These devices can check my alternator, battery, auto electrical system, and even the on-board computers.In the case of your alternator, these tests do more than just check for output voltage.
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What careers are available in the automotive field?
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How far can you run a 12 gauge electrical wire?
This is a voltage drop question. To answer this question an amperage is needed.
How do you check amperage draw on electrical devices ie.. 12v automotive?
Depends AC or DC CORRECTION!!! GEEZE!!! AUTOMOTIVE IS DC!!! This isn't exactly an easy job but it is an easy method,,, you simply hook up an amp meter in series with your voltage source and your load. If you are looking to install an amp meter permanently follow the meters instructions, if you are doing diagnostic work ther are highend meters such as those made by Fluke that you can clamp onto the insulated positive battery cable that will read the current flow, you will need to follow the instructins that come with the meter for these as there are some variations. BE ADVISED AUTOMOTIVE EQUIPMENT CAN DRAW A SUBSTANTIAL AMOUNT OF CURRENT! DO NOT USE A MULTI-METER THAT IS LIMITED TO 20 AMPS!!! Whilesome stuff is much lower in demand, many things in a car or truck can draw thirty amps and more... this can destroy a meter designed for a maximum of 20 amps. ALSO the average automotive battery, is rated in COLD CRANKING AMPS, and this is not a true figure of how much amperage it can produce when fully charged at 65 degrees and above, at these temperatures these batteries can source more than two or three times its cold rating... THIS IS MORE THAN A LETHAL AMOUNT!
How an amperage reading would be taken using a clamp-on?
Simply "clamp-on" the clamp of the amp meter to any electrical conductor supplying the equipment that you wish to check while it is in operation. It is better to use your clamp-on with each individual conductor one at a time.
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How do you power up amp in 2002 dodge grand caravan?
If the battery is dead you will need a battery charger. If the battery is good and you have low amperage then you will need another alternator. Most parts stores will check it for you. If you are looking for MORE amperage then you would have to buy a larger amperage alternator.
