Troubleshooting Car Problems : How to Check Relays on Automobiles

In order to check relays on cars, take out a good relay and replace it to see if the problem still exists. Learn about proving that a relay is defective before trying to replace it with help from an automotive technology professor in this free video on automobile relays.

Expert: Bob Ricewasser
Bio: Bob Ricewasser is a former automotive technology professor, and an avid car collector.
Filmmaker: Nathan Boehme

[techgood]

remove the relay, use multimeter to test it, also you can apply voltage to relay and check continuity

[stovintis]

How can I test mine if I don't have multimeter? Thanks

[paintthecopZ]

use a AA battery, give power to the iron core, listen for the click. NO CLICK NO GOOD. :D

[mazdaabe]

Terrible info, anybody who has the least bit common sense knows to put a new relay and check if that is the problem.

[RobertShank]

Garbage! There are scores of other videos on You Tube that talk about checking relays with a multimeter for continuity. Keep in mind folks, if you purchase a relay from an auto parts store that cost anywhere from $10 - $60 and you swap out the relay with one you have and you find that it was not the relay acting up or faulty, most auto parts stores will not let you return a relay.