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The iJDMTOY High/Low Relay Wire Harness is a professional-grade automotive wiring solution designed to convert original H4 dual-beam headlights into separated 9005/9006 high/low beams. Featuring dual 4-pin SPST relays rated for 40 amps and a 320W max load, it ensures reliable, direct battery power delivery while protecting your vehicle’s wiring. Compatible with multiple connector types, this harness offers easy installation with built-in safety fusing, making it ideal for upgrading fog lights, off-road light bars, and other heavy-duty lighting applications.
| ASIN | B01M15V3HK |
| Best Sellers Rank | #240,510 in Automotive ( See Top 100 in Automotive ) #1,132 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 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!
R**S
Great product
Awesome to yes if you know what you're doing
J**N
Works great with scion Xa projectors retro fit
These are so close to plug and play just needed to switch two wire around on the main h4 plug harness for it to work! besides that now everything works now and I'm happy with the results!
M**O
Funciona
Funcionó bien en mi 2012 Chevy express
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)
R**R
DIDN'T WORK FOR ME
DIDN'T WORK FOR ME
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
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.
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
3 weeks ago
4 days ago