Seller notes

H4 HB2 9003 Positive & Negative Converter Polarity polar switch harness converter H4 9003 HB2 Polarity Switching Module Converter If your vehicle is negative switched wired from the factory, this module may help you when installing an aftermarket HID or LED kit.Product Description Are you converting your headlights to HID or LED and having issue with them not turning on or only one side works? This is a very common problem on cars, trucks and SUV that use H4, 9003 and HB2 light bulbs. Simply des...

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