voltage drop test question

[stranger12]

Hi ,

I am trying to do voltage drop test on my starter and one questions i have is , why do you connect the pin to positive on the battery and positive on the starter to test for voltage drop ?

I have watched youtube videos and read articles on how to do it but what doesn't make sense is, voltage is from positive to negative so how can I see excess voltage coming to the wire when I am only using positive positive or negative negative ?

for instance you do the negative side with black pole on ground or battery negative and the other side on starter body .

or do positive voltage drop test by connecting one pole to the positive of the battery and another to the positive cable or pole of the starter.

I appreciate your help.

thanks
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SV650 Red
R6 Red

[Islander]

By putting one lead on the starter +ve terminal and the other on the battery +ve terminal you're directly reading the voltage that is dropped across the cable supplying the starter.

[stranger12]

That is where i am confused as always thought u need + and - to have voltage .this is + and + so dont get it

If i imagine a normal circuit , is it that the excess voltage flows back through negative back to positive and hence seeing the volt drop?
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SV650 Red
R6 Red

[Islander]

[bikenut]

and any voltage drop across a bad connection........

bad connection equals less "power" for the starter motor to do its thing.........

how was volts drop across battery when cranking?? which indicates battery "health"...... :karma:
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nuts about bikes

[Taught2BCauti...]

If you want to do it another way, test between battery negative and one end of the starter cable, then from battery negative and the other end of the starter cable.

The difference between the two readings, is the voltage drop across the length of the starter cable.

You can measure voltages between two positives, like on a PC Power Supply, where you have +12 and +5 volts - you would get a reading of +7 volts, which is the potential difference between the two.

Voltage = potential difference between two points in a circuit, neither of them has to be 0 volts for there to be a difference.
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Honda Varadero XL125(V8)
www.TheFutureIsHere.eu

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