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⚡ Upgrade your ride’s lighting game—because your road deserves the spotlight!
The iJDMTOY H4 Input Dual 9006/9005 Output Relay Wiring Harness Kit is a professional-grade automotive electrical solution designed to convert H4 dual-beam headlights into separate high/low beam outputs. Featuring dual 4-pin SPST relays rated at 40 amps and a plug-n-play design, it ensures safe, efficient power delivery directly from the battery, protecting your vehicle’s wiring while supporting up to 320W lighting setups. Ideal for fog lights, off-road light bars, and custom retrofit projects.
| ASIN | B01M15V3HK |
| Best Sellers Rank | #887,930 in Automotive ( See Top 100 in Automotive ) #4,970 in Automotive Replacement Electrical Wiring Harnesses |
| Brand | iJDMTOY |
| Brand Name | iJDMTOY |
| Coil Voltage | 12 volts_of_direct_current |
| Connector Type | H4, 9006, Hb3 |
| Contact Current Rating | 40 A |
| Contact Material | Silver |
| Contact Type | Normally Open |
| Current Rating | 40 A |
| Customer Reviews | 4.2 out of 5 stars 142 Reviews |
| Item Highlight | Converts H4 Dual-Beam To Separate 9005/9006 Hi/Lo Beams, Dual Relays, Plug-N-Play Install, Power Up High/Low Beam Headlight |
| Item Weight | 8 ounces |
| Manufacturer | iJDMTOY Auto Accessories |
| Minimum Switching Voltage | 12 volts_of_direct_current |
| Model | For Repair, Conversion, Custom Retrofit |
| Mounting Type | DIN Rail Mount |
| Number of Items | 1 |
| Number of Packs | 1 |
| Operation Mode | Manual |
| Part Number | AA1089a |
| Wattage | 320 watts |
P**Z
Miata NB1 to NB2 Headlight Conversion
I did a headlight conversion from a Mazda Miata NB1 to NB2 and used this wiring harness. The NB1 Miata has a ground switching circuit, so the diode in the harness needs to be removed. Once that's done, the low beams stay on when I turn on the high beams. The indicator on the dash also works. I wouldn't say this is super amazing quality, but it gets the job done and has been working so far, so I recommend the product!
D**H
Works great
Does what it's supposed to do, fits right out of the box. Added bonus: Leaves low-beam on when switching to high beam... (Did not know this when purchasing so it made testing what plug was what (low/high) a bit interesting to say the least)... Note: It's fitted with four (4) 9006 plugs. So if you want to use the "official" high-beam-bulb (9005) you have to change out 2 plugs. None of the 4 plugs are marked to show what they are supposed to be (low/high). 9006 = Low beam (usually 55 W) 9005 = High beam (usually 65 W)
N**L
Does the job with a tweak.
Converting my NB1 Mazda Miata to NB2 head lights. Wire lengths were perfect for this application. Had high and low beams always on until I cut diode out of the harness where it plugs into the stock head light plug. I think this is because the miata had a common voltage and switched ground, but I'm not sure. Lows stay on with high beam, but high beams cut off when switched to low. I don't seem to have a high beam indicator on my dash. I'll keep tweaking it to see if I can get that to work.
R**S
Great product
Awesome to yes if you know what you're doing
M**O
Funciona
Funcionó bien en mi 2012 Chevy express
R**R
DIDN'T WORK FOR ME
DIDN'T WORK FOR ME
J**R
Nice
Nice and easy to install
S**T
Well worth the money
No issues, I would start connecting the wiring hardness from the drivers side towards the battery, then once all connected then wire tie hardness in place
G**Y
better diagram on the wires would be nice
i used it on my truck low beams and cut the plug off and wired it into my dash light switch
O**Z
Excelente
Es fácil adaptarlo, en mi caso solo cambie el conector H4 por el 9007 que tiene mi carro, y funciona exactamente como quería (en altas se mantienen encendidos los dos) anteriormente se prendian por separado alta y baja
Trustpilot
2 months ago
2 weeks ago