What is the purpose of this, or any other relay. I had some else suggest a relay for a pair of add on back up lights.
1816700
The purpose of a relay is to allow high amperage draw accessories such as winches or auxiliary lights the ability to be switched on and off without out running heavy gauge wires to the ON/OFF switches not be rated for that load.
1816701
You need a magnetic relay like this to either let your car turn off you lights if directly linked to your battery. If you're taking into another wire, like a break line, you don't need a switch as long as you are ok with always pairing whatever it is you're pairing to. I hope this helps. Check out how-to sites on relays and switches--you can even get step by steps and You-Tube.
1816702
The idea of a relay is to switch a higher current circuit with a lower current input. For example, you could use a tiny on/off switch meant to only handle 1-2 amps to power the relay, and that closes the circuit on an isolated circuit of the relay that can handle up to 40 amps (big lights, for example). If you ran the small switch directly on the input of the lights, you'd burn out your switch instantly.
1816703
Helps amp draw and current draw ie: after market lights, cooling fan that is I used mine for an after market fan
1193358
I have no idea. All I know is they work just like stock lights on my 96 Roadmaster both high beam and low but are 1000% brighter, and install was very easy. I do doubt that you need any extra relay or other parts.
674278
Far easier to plug this in back by the spare tire.. The relays do not automatically come installed in your trucks fuse box.. thats why they send them with, but if you have them already just throw them in your glove box..
1025156
The purpose of the relay harness is to be able to power the lights directly from a battery source rather than through the electronically fed source provided by most modern day autos/trucks. The electronic source sometimes runs low and will not allow the lights to operate reliably. That is what happened to me when I installed the new HID lights using the power source feeding the existing lights - sometimes worked, sometimes not, one side or the other. Installing the relay harness solved that problem by keeping the voltage sufficiently high to power the HID lights. Recommend trying without the harness and, if they don't work right, go for the relay harness. The purpose of the relay harness is to be able to power the lights directly from a battery source rather than through the electronically fed source provided by most modern day autos/trucks. The electronic source sometimes runs low and will not allow the lights to operate reliably. That is what happened to me when I installed the new HID lights using the power source feeding the existing lights - sometimes worked, sometimes not, one side or the other. Installing the relay harness solved that problem by keeping the voltage sufficiently high to power the HID lights. Recommend trying without... » Read More The purpose of the relay harness is to be able to power the lights directly from a battery source rather than through the electronically fed source provided by most modern day autos/trucks. The electronic source sometimes runs low and will not allow the lights to operate reliably. That is what happened to me when I installed the new HID lights using the power source feeding the existing lights - sometimes worked, sometimes not, one side or the other. Installing the relay harness solved that problem by keeping the voltage sufficiently high to power the HID lights. Recommend trying without the harness and, if they don't work right, go for the relay harness. « Show Less
423732
The light only pulls 10 amps, so you can get a heavy duty rocker switch and wire it that way and be fine. I used a relay just because I could feed smaller wires through the firewall to the switch and if I wanted to at a later date add more lights controlled by the same switch.
460164
I didn't but its not a bad idea. how big?no less then 50amps with reset, it depends on how much you draw i don't think you need a relay
1053953
It's recommend. The hids may draw a sudden surge of power when initially turned on, causing weird electrical problems. This relay will isolate them power wise from the rest of the electrical system. I recommend it highly.
1067195
Need to know what you are trying to accomplish with this. I used mine to protect fuse block from too much power and overheating and melting fuse block.
1679664
This particular unit is for post lights so it would not be the one for you. My son has a porchlight however that has the same functions as this unit. I don't know who the manufacturer is though. If your two lights are wired together though you only need one of them to have these special functions.
1737690
Back track the wiring and make sure you have it wired right to the relay. If everything is good you might have a bad relay.
1948080
Purpose is to convert a motorhome with combined turn/brake lights to a towed vehicle with separate turn and brake lights. Works fine on mineI use diodes at the tow car end to prevent feedback
1590785
Well one wire harness does 2 lights, and if your going to run 3 light I would recommend 2 harness. You don't want to overload the relay. Hope that helps
1411132
I used it to control the headlight relay in my truck. That way I could leave my headlight switch ON, incase I forgot to, so my lights will turn ON only at night and OFF during the day. The photoelectric lead reacts to light, turning the switch ON/OFF.
429628
Yes that is what it was designed for. If you use in an outside light it does best with an outside light cover that is not opaque or reflects the light back unto itself. This tends to shut them off periodically and it may take a while for them to come back on. Also if you are using more than one, say for example a set of garage lights. They should ideally be 10 feet or more apart so they don't cause each other to shut down. They are very cool though and I love mine since I have no switch inside my house to turn my garage lights on, this solves the problem when it gets dark.
1600310
"The relay contacts do not supply power. You use them as a switch for the power you wish routed through them" Same answer, no attitude. Cheers!
2054020
No need for a relay, they don't draw that much power. Do not use them on the road, they are painfully blinding to others, a driver could lose control and hit you.
1656692
I read some of the other responses..you don't need a relay with these lights, they only draw about 2 amps total.