how do you install car headlights with relay?

Answer 1

Here's what I found on wikiHow.com. This should work for all cars and trucks.

Before getting started, you will need these things:

Car
Head Lights
Wire
Electrical Tape
Relay (see step 2 for info!)
Light Bulbs
Switch
Fuses
Mounting Brackets
Hardware to attached brackets and lights.
Wire Strippers
Wire Nuts.

If you are replacing existing lights, skip steps 4-10.

1.Purchase needed materials (listed at bottom of page). If replacing existing units, see tips.
2. Remove the lights from the box and check their amp rating. Get a switch of suitable rating. If a switch of equal or higher ratings can't be found, you will need a relay (see below).
3. Use brackets to mount them in the desired location.
4. Locate a convient place in the vehicle to mount the switch for the lights.
5. Mount the switch in the vehicle.
6. Locate a source of power under the hood that does not directly attach the wires to the battery. (One some vehicles, the headlight circuit may do.)
7. If you found a switch of the needed rating above, connect as follows: source to switch, switch to lights, lights to source. Skip to Step 11.
8. Mount the relay somewhere under the hood.
9. Attach the Light circuit to the "Load" side of the relay (some relays may call this something else). Run wire from power source's Hot supply to one of the relays load terminals. Connect the relays other load terminal to the light closet to it. Connect the remaining connection on the light to one of the connections on the other light. Connect second lights remaining connection to the negative side of the power source.
10. Connect the switch. Run wire from a power source to one of the "Control" termainals on the relay. Connect the other termainal to the switch. Connect the remaining switch termainal to the negative of the power source.
11. Install bulbs.
12. Start car and test. If selected sources fuse blows, replace and try connecting to another source.
13. If they work, proceed. If not check connections.
14. Cover all joints with electrical tape to ensure water tightness.
15. Close hood and use.


Warnings :
Electrocution hazard.
This project is not recommended to people with a lack of knowledge of electronics and electrical systems in cars.

Remember to recycle the packaging.

Answer 2

to use relays to power your lights you use the original wireing to operate the relay and then the relay operates the lights,the relay can be wired straight to the battery thru a fuse to get higher current flow to the lights.the original wires are connected to the control side of the relay and then the switched side connects to the original headlight connector,end result should be brighter lights

Answer 3

Go on line and look up relay. They will explain that you send power throught the relay toopen another power source to turn on the lights. It is a good deal.

Answer 4

The HIDs have nothing to do with any other lights. If it's for low beam, that's the only thing the HIDs will be effective for. Everything else literally remains the same.