Testing For Open Circuits By Measuring Resistance
- Make sure the component or lead to be tested is not under tension (e.g. by removing the relevant fuse).
- Set the multimeter for measuring ohms and connect the ohmmeter to each end of the component/lead to be tested.
- Jiggle the relevant wiring harness while observing the ohmmeter.
Normally, the resistance of a wiring harness is less than 1 ohm. Specified values apply to components.