Testing For Continuity

WITH A DMM
Continuity tests work well for detecting intermittent shorts to ground and can be performed by setting the DMM to ohms, then pressing the PEAK MIN MAX button. An audible tone is heard whenever the DMM detects continuity for at least 1 millisecond. This test checks for continuity along a wire, through a connection or switch.
1. Remove the negative battery cable.
2. Place the leads of the DMM in COM (black) and V/ohms (red) inputs.
3. Set the rotary dial of the DMM to ohms.
4. Press the PEAK MIN MAX button.
5. Connect one lead of the DMM to one end of the circuit to test.
6. Connect the other lead to the other end of the circuit.
7. If the DMM displays low or no resistance and a tone is heard the circuit being tested has good continuity.

Testing For Continuity:

WITH A TEST LIGHT
This test checks for continuity along a wire, through a connection or switch.
1. Remove the fuse from the suspect circuit.
2. Connect one lead of the test light to one end of the circuit to test.
3. Connect one end of the circuit to be tested to ground.
4. If the test light is not self-powered connect the other lead to a battery positive voltage source.
5. If the test light illuminates (full intensity) then the circuit being tested has good continuity.