Useless To Troubleshoot Electrical Problems........
Without the owner having these two items and a basic level of knowledge. https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester
Forum Discussion
For "masters" at using a 12V test light check out Eric O. on the YouTube South Main Auto channel and Ivan on the Pine Hollow Auto Diagnostics channel. These guys know Ohm's Law inside out and backwards !
One tip, always confirm the test light is properly functioning. You never know when a loose ground on the test light can send you off on a wild goose chase.
Most test lights are about 30-50 ohms. This means that at MOST the light should only draw 400 mA (typically, more like 250-300 mA), so most computer controlled outputs should handle that current. Don't forget, 99% of computer circuits GROUND the control side of the "device under test" !
One tip, always confirm the test light is properly functioning. You never know when a loose ground on the test light can send you off on a wild goose chase.
Most test lights are about 30-50 ohms. This means that at MOST the light should only draw 400 mA (typically, more like 250-300 mA), so most computer controlled outputs should handle that current. Don't forget, 99% of computer circuits GROUND the control side of the "device under test" !
