Swap it with known good one. Many circuits use the same relay, check the part number on the relay.
Not usually. Disconnect it and see what happens.
The Headlight Relay, identified as HEADLAMP, is in the Driver's Side Instrument Panel Fuse Block. Just pull it out and replace with new one. See page 5-96 of your "Owner's Manual" for location...
A car relay is a remote control switch that controls electrical components. To see how you should test yours, check your owners manual. Simply swap it with another like relay.
Behind the passenger side head light. actually, it's below that headlight. take the headlight out and cut a 2" x" 2 square out of the thick plastic from the bottom. you'll see it.
It is in the under the hood fuse box and if you open that youll see 4 black relays all next to eachother the one on the bottom right is the headlight relay. Just turn on your headlights and take it out and they should turn right off.
It is located near the front headlight. pull the front plastics off the biker and you should see it hooked up to the headlight. its a rectangle box.
Depending on the year, the Regal could have a relay to control the high beams. Check the distribution box under the hood to see if there is a bad headlight relay.
swap the relay with another exciting identical relay almost all relays in onne boxed unit are the same rarely different but if the prongs are the same your good put it in and turn the key and see if you here a click or see if your problem is fixed if not look else where you cant really test a relay so to say hope this help
You should be able to switch the relay with the horn relay and then check to see if the horn works.
Behind the driver right side kick panel. there is going to be a small black box. It is the HCU headlight control unit. inside are to relays.
You can test a relay with and without a 9 volt battery. If you apply 9 volts to it and it's sufficient to turn on the relay, the NO switch will close and then have continuity with common. If you don't apply voltage, the NO switch will be open and not have continuity with common. You can use these continuity and resistance checks to test a relay to see if it works.
It is located behind the grille on the drivers side of the car. If you remove the drivers headlight, then look toward the grille from the vantage point of where the drivers headlight was, you can see the solid state relay. It has a bunch of fins on it, and is about 3" square. On mine it was riveted to part of the frame in front of the radiator and behind the grille.