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Features
- Great for vehicles with poor battery, alternator, or heavy power draw
- Power directly from car battery instead of stock car headlight bulb harness
- 40A/12VDC SPST relay configuration
- High quality PVC tubing avoids over heating
- Size: 65~70 inches
- Compatible with both 35W and 55W HID conversion kits
- Directly compatible with 9005 9006 9145 H10 HB3 HB4
- Using the HID bulb extension cord, it will also work for H1 H3 H4 H7 H8 H11 H13 9004 9007 880, etc for single beam application
- Content: one set of HID conversion kit
- See more product details
Installation
How to install the HID Relay Wire (Click the picture to enlarge)


Frequently Asked Questions
Q: Can I use this relay harness for 55W HID conversion kit system?
A: Yes, you can use this relay harness for both 35W and 55W HID conversion kits.
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Q: Which bulb size is this relay harness compatible with?
A: This relay harness is
directly compatible with the 9005 9006 9012 9140 9145 9150 HB3 and
HB4 socket
and by using the the extension power
cord comes with the HID bulb, you can also install this relay
harness for any other bulb sockets such as H1, H3, H4, H7, H8, H11,
H13, 9004, 9007, 880, 5202, P13W and more.
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Q: What is SPST relay configuration?
A: SPST means it has stage of only ON or OFF, verse the SPDT has two operating stages: on/off or off/on.
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Q: Where else can I use this relay harness for?
A: The purpose of the relay harness is to provide a constant and stable 12v power source to the lights these are connected to. Please
keep in mind that the relay has no physical switch and is operated by a trigger connector which is connected to the vehicle existing OE harness from the vehicle. You can use it for any
lighting applications such as headlights (low beam or high beam), fog lights, and daytime running lights, etc.
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Q: What shall I do when I'm trying to install this relay harness for the HID kit that seems a little bit too short?
A: This relay harness is designed with approx 65-70 inches long. It should fit most mid-size to large size vehicles for installing the HID conversion
kit. However if it is still a little bit too short, you try following tips for extend it longer, please check
extend
HID Relay Harness for oversize vehicles
.
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Q: Why does the relay keep making buzzing noises after the installation?
A: A buzzing relay may indicate that the trigger wire of the harness may not be getting a stable input power; the buzzing is a result of the relay
switch closing and opening rapidly. Since a relay is operated electronically by a current, an unstable power can cause this.
Try switching the trigger wire connector to a different power source and see if the same problem occurs again. Let us know.
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Q: Why doesn't the relay harness work after the installation?
A: Would you please try the following troubleshooting:
1) check whether the black ground terminals are properly mounted to the car chassis where there is no paints, no rust on the surface to ensure proper looping
2) check whether the red wire is mount to the battery positive or the engine bay positive terminal directly
3) check whether the fuse on the red wire is not blown
4) check whether the trigger wire receives power. You can try flip the trigger adapter 180 degrees and try again
5) hear whether the relay module box has clicking sound when you first turn on the switch
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Q: Why does the HID still flicker even after installing the relay harness?
A: If after installing the relay, the HID light still flickers, it indicates you will need a
capacitor type decoder to stabilize the power to eliminate the HID light from flickering
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