If you do not install a relay and use a switch you could end up overheating the switch melting the wires and reducing the current that is getting to your lights making them less bright. With our wiring harness all you need to do is cut the wire coming from the switch to the 30 prong on the relay and wire it to your high beam lead or your backup light wire.
Hd Max Led Light Bar Wiring Harness Off Road Relay Switch 40 Amp 500w
Wiring a relay switch. Each relay activation will cause the light to toggle. Operationally it works the same way. How to wire your light using a relay the relay will have 4 points on it marked 30 87 85 and 86. In this video i show you how to wire a 12 volt automotive bosch style relay. A 3 way light switch is often found in your house where two light switches can be used to activate a single light. The main purpose of a relay is to switch electrical circuits off and on at given times and allow circuits to be automated.
For anything above 30w we recommend installing a relay. Follow the relays wiring schematic when connecting the wires to the relay one of the relays terminals goes to ground. A great advantage with relays is the ability to switch many different circuits of different voltage types all at once by using the same relay. Wiring with a relay allows the power to run straight from the battery through the relay mounted nearby directly to the lights. Then run a heavy gauge wire from the battery to the relay placing a 30 amp. Instructions for wiring a standard automotive relay with descriptions of the pin out and the schematic.
That way when you do have your high beams on the current from that goes to the dash switch first and if that is off the electricity cant get to the 8586 circuit to. Using a relay can also shorten the distance that high current wiring needs to run. This video covers both 4 and 5 pin 12vdc relays. Buy relays pigtails and kits here. See below for an example of a relay wiring diagram. The interior mounted switch only draws minimal power though the interior fuse block to activate the relay.
I go over what each contact of the relay is for and how to understand the schematic that is. The factory wiring in modern cars is light gauge and is not designed for additional loads. A relay can be used to power a new circuit with very little added current draw on the original wiring. As in the diagram a wire is run from a 12 volt power source to the switch in the cab and out to the relay placing a fuse at the source of the power. This sample is exactly the same as a 3 way light switch the only difference being each physical switch is replaced by a relay.
Gallery of Wiring A Relay Switch
