Not sure quite what youre asking. Do you want to check the fuse? Is that what youre asking? How do I check a fuse. Normally you can see the wire through the middle to give a quick indication. This wont always mean the fuse is ok. The best way is to use a multimeter and measure the resistance of the fuse. It should be really low, ideally 0 ohms.
You will need a Multimeter to run some test on the switch and the wiring.
The best way to test a door lock is to locate the wiring for the door lock usually in door boot or kick panel. Use a test light with a probe and poke each wire until the door lock is activated. How ever be sure to they are not vacumm locks
Do you: Want to know how they work? Want to know how to test? Want to know how to replace? What kind of vehicle is it in? What are the symptoms? Your question is too vague.
It should have only a fuse and a switch, no relay. Check ALL of the fuses with a test light.
Need to check the body control module, And all fuses with a test light.
just get a test light turn the ignition to the on position and check them all until you find the blown ones
probably because the door lock actuator for that door is faulty. i would test the actuator first.
these computer vehicle if they do not start ck all fuses & relay , can be locate under the hood or under the dash or both location , can use a test lite to ck fuse ,be sure you got a good ground on the test lite.On top of the fuse have on opening to ck. The key have to be in the RUN position to ck all fuses. As for relay most of the relay are the same , if horn is working ,can use this relay to ck other relay. good luck.
Fuses. If fuses OK, read PCM datastream.
test BODY fuse with a testlight
Have you checked the bulb? Put a test light across the terminals.
You have to find out what is drawing power. Look at all interior lights, glove box, trunk, under hood, all lights including brake lights. If none of them are on it may be a relay such as a power window or door lock relay that is stuck. Can also be one of the p/w switches stuck in the up position. Test them all to see. If you are unable to find it in this manner, then start by removing fuses. Once you get to the circuit that is drawing power you will know by the spark when you remove the fuse.