No No No, your not doing a voltage drop because of heat build up... Your doing it because an Ohms meter uses an extremly minimal amount of power...... Lets say you have a connection your tyring to test... you check the resistance, and you get .12 ohms.... In the auto world, thats a good connection.... BUT... lets say that connection has 30 strands, and 29 have severed.... the amount of power the Ohms meter uses will still give you a solid read for ohms.... But as soon as you load the circuit, it cant carry the power. So you check voltage from each side of it...... What your actually reading is a backfeed of power<you dont want any> So the higher the voltage, the worse the connection..... Remember Ohms you have to isolate, then read... on alot of these automotive connections its nearly impossible to actually isolate what your testing.... Other problem, alot of sensors/solenoids will ground out in default off.... This is were you can run in to major problems trying to test ground connections.... Youll backfeed your resistance reading into another circuit, even if the circuit is bad, it can read good.....A Voltage drop test reads what a connection is doing on a live circuit.... So you have to remember to power up the circuit your testing.........Works wonders.
Not trying to say Ohms readings arent usefull, but when looking for reall application reisstnace, you want the voltage drop
Not trying to say Ohms readings arent usefull, but when looking for reall application reisstnace, you want the voltage drop