Description:

1). This 1set 2-headlights h4 headlight relay harness Fixes cars with 2 pcs H4 plug headlamps, such as 7x6 led headlights. Problems like Dim Headlights, Flickering Headlights, Back Feeding Power, Malfunctioning Headlights when using Hi/Low Beams can be fixed with this kaslight 2-headlight h4 headlamp relay. Make a big improvement for visibility on your cars at night. 
2).【IMPORTANT NOTICE】As for Toyota Pickup and for Toyota Tocoma use a double ground which leads to the headlights not work or only one beam work, this Harness is a must to fix the problem. It may be still complicated to wire in some new relays to run the headlights properly, TAKE IT EASY, it is not the issue of product quality, only because wiring circuit of Toyota series is a little complicated. 
Perfectly match H6054 6054 7X6 led headlights for toyota pickup 1992 led headlight harness. 
3).【IMPORTANT NOTICE】If your socket pin is not standard, H4 9003 HB2 Wiring Harness is needed 
Also fixes: Overloading the Headlight Switch, Overheating Plugs. If you are upgrading to LED Bulbs or are having trouble with your 7"x6", 4x6", 5-3/4" or any other H4 plug headlights not working properly, this is your fix!! 
4). Package includes one set h4 socket relay kit. 

H4 headlight relay harness 
Which vehicle is suitable for this H4 harness? 
H4/9003 conversion, H6054/6054/7x6/5x7 headlights 
This means any vehicle that uses H4 headlights, for Jeep Wrangler YJ Cherokee XJ truck, for Toyota pickup, etc. 
This harness repair: 
• Old for Toyota dual grounding problem-for Toyota headlight plug uses dual negative circuit to control low/low beam 
• Dim headlights 
• Back feeding power 
• Flickering headlights 
• Headlight failure when using low/low beam 
• Overloading the headlight switch 
• Overheating plugs 
• This is a h4/9003 12v headlight conversion harness with high temperature 
The two built-in durable relays and high-temperature ceramic headlight sockets can well protect the car circuit in the event of abnormal conditions.