Voltage Drop Test

Question 1

What is the purpose of performing a voltage drop test?

Answer 1

To determine if too much voltage is being lost to poor connections.

To determine the cause of excessive, abnormal resistance

Question 2

Can you perform a voltage drop test with the circuit off?

Answer 2

No - the circuit must be turned on in order to measure current flow.

Question 3

What is the total voltage drop on the V+ or ground side of the circuit that should not be exceeded?

Answer 3

0.3V - 0.5V (300mV - 500mV)
The lower the readings, the better.

Question 4

What is a possible ground connection for a voltage drop test?

Answer 4

The battery is grounded out to the engine block or the body itself (for body on frame).

You can use the device ground wire as well.

Question 5

There should be no more than ___ volts of loss per connection

Answer 5

0.1V

Question 6

True or False: Both the positive and ground side of any circuit can be tested this way

Answer 6

True!

Question 7

What should the DMM (Digital Multimeter) scale be set to?

Answer 7

DC scale (0-2V or the mV scale)