Relay High Beam Low Beam Wiring Diagram

Remove the wire from the wiring harness.

Relay high beam low beam wiring diagram.

Anxingo dual high low beam headlight relay wiring harness h4 9003 with high heat ceramic plugs. Power 12v to the fogs lights passes through the normally closed contacts of the relay terminals 30 and 87a. Fog lights off with high beams on. Look into the connector end of the wiring harness.

You need to connect. Next was the relay. Attach the low beam circuit feed from the headlight switch to the 86 terminal on the low beam relay. Attach the new high power feed wire to the 30 terminal on both.

If you have two headlight relays you can choose either one. There was no change indicating that the problem was not in the relay. I swapped the low and high beam relays. How to wire automotive spdt relays.

Following the above diagram relays. The larger blue red wire from the other relay goes to the low beams. In this car there are three identical relays sitting next to each other high beam low beam and horn. When the coil of the relay is energized 12v from the high beam switch to terminal 86 ground on terminal 85 the.

Download a wiring diagram of your car to be sure. Refer to your vehicles wiring diagram and determine the color of wire and pin number of the power supply wire for your existing high beam headlights. So low beam at top tan in my case high beam green in my case to blue and black ground to black. Use the existing high and low beam wires coming from the firewall to trigger the relay run a new high power feed with a fuse direct from the battery and hookup the existing high and.

You splice two 20a relays into the existing wiring harness right out near the headlights so one relay controls the low beams and one controls the high beams. Left to right the horn low beam and high beam relays on my 1975 bmw 2002. 56b is the low beam feed. Love the product and have the option of high wattage bulbs.

The original wires going to the low beams and to the high beams each split so they can feed both sides of the car. Attach the high beam circuit feed from the headlight switch to the 86 terminal on the high beam relay.