Another issue that happens to auto electrical and electronic wires and components after a collision is short circuit. This is very commonly observed by technicians working in collision repair shops.
This usually happens because during a collision, the wires gets pinched or severed. This kind of check is usually done by first setting the multi-meter in the same manner as you would with the continuity check. After that, the test leads of the multi-meter is attached to the opposing ends of the adjoining wires. With regard to the reading, a reading of infinity should be observed on the meter. This is because the wires are insulated. On the other hand, if the reading shows zero, then that means that the wires are shorted to ground or another ground wire.
Again, because of the dangers associated with these kind of diagnostic tests, it should only be conducted by a trained professional and a safe environment like a collision repair shop.