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Illuminate Your Drive! 💡
The KASLIGHT Ceramic H4 Sockets H4 9003 HB2 Wiring Harness is a reliable solution for retrofitting headlights in cars, trucks, and marine vehicles. This 2-piece set is designed for seamless compatibility with various LED bulbs and is backed by a 1-year warranty, ensuring both performance and peace of mind.




| Manufacturer | KASLIGHT |
| Brand | KASLIGHT |
| Item Weight | 1.12 ounces |
| Package Dimensions | 3.78 x 3.5 x 1.18 inches |
| Is Discontinued By Manufacturer | No |
| Manufacturer Part Number | KAJE-0004 |
| Position | Front |
| Bulb Type | Light Emitting Diode (LED) |
| Voltage | 12 Volts |
F**8
Great quality
These where great quality sockets with ceramic cores and the blinker relays fit really tight in sockets. I used these in a golfcart to upgrade with blinkers. They worked out very nice for my project.
C**V
Ceramic headlight connector H4
Exactly what I needed good product true to its name ceramic I had one already. I just needed another one because my other headlight connector went it was made out of plastic and the connection is not good so I got the ceramics and they’re perfect.
T**S
Miss Piggy
They worked very well Fit great with a snug fit Very easy to install Good quality for the price
R**U
50% Success Rate
In 1 of the 2 adapters received the black wire was not crimped enough and completely fell out of the adapter. Luckily the other adapter was done propey and is working fine. I only needed 1 of the 2.
O**R
1995 Toyota Tacoma wiring harness
They came on time and it helped me redirect the brightness because I have a 1995 Toyota Tacoma with a common hot wire and 2 negative wires with some voltage on them which later I had to purchase a cheap general purpose relay to light up my high beam correctly. I should make a YouTube video.
F**N
Imo they are worth the small upcharge for ceramic sockets. Very well-made. Yes I'd buy these again.
I upgraded our 1994 S10 Halogen headlamps to LED's (in another review) and these H4 conversion pigtails are great. Well-made, the ceramic plug seats firm and sure, as well as the spade connectors on the other end. I made sure the parts were wiped-clean of dust and judiciously used some electrical tape to seal up the gap on the plug mating surface, as well as the other end spade connectors going into the OEM GM plug. Might want to use a bit of dielectric compound in those connections if you're REAL detail-oriented, but they don't come from the factory that way and are fitted dry. Make sure you have the pigtail's spade connectors seated all the way into the OEM headlamp plug. I used some electrical tape just for grins- but both the Pigtail's ceramic plug AND the spade connectors seat very firmly. Would I buy the "other" pigtail option without the ceramic connectors to save a buck? No, but that's up to you. OEM headlamp connectors weren't anything special, just plastic units anyways.
A**R
Good fit.
Bought to go with new truck lights for my son. Works great; easy fix to change out for new lights with this adapter.
K**N
Great product
Great product
Trustpilot
3 weeks ago
2 months ago