If your car uses single filament bulbs you’ll quickly discover that you need two headlight bulbs in each side, as one will work the dipped beam and the other will work the main beam. Twin filament: If your car requires a H4 bulb, you are relying on a twin filament bulb for both your low and dipped beam. A twin filament is a single bulb with Difference Between H4 and 9003 Bulbs. On the outside, there is absolutely no difference between H4 and 9003. Both share the same housing, the same dual-filament internals, and the same three-pronged connection. So, of course, they are interchangeable, i.e., installing a 9003 bulb in a vehicle equipped with H4s, and vice-versa. In order to replace Halogen headlights with HID (also known as Xenon gas lights), you need to look into purchasing an HID Conversion Kit from a reputable distributor. Even with a conversion kit, interchanging Halogen and HID bulbs can be a bit complicated. If you touch the glass on the bulb, remember to clean it with something like acetone to get rid of the oil/fingerprint. Don't use kero, as it leaves a residual film. Changing the bulbs 1. Pull the bulb socket off. 2. Pull the rubber boot off. 3. Unclip the wire retainer, which work like a safety pin. 1.) When one side of the vehicle has the LED bulb installed, the LED bulb will light up but the stock halogen bulb will not. 2.) When LED bulbs are installed on both sides, neither of them light up or only a portion of the bulbs light up. 3.) Both LEDs light up full power when the high beam is on. Solution: . How to install, replace & change aftermarket H1 headlight bulb halogen to H1 LED headlight conversion kits bulbs? Easy installation, this video shows the ste With both on, the bulb is brighter and functions as a high beam headlight. Tip: The most common dual filament bulb used in headlights is the 9003 (HB2/H4) bulb. Cars that use these dual filament bulbs can make it easier on drivers. Instead of buying and replacing four separate headlight bulbs, owners of cars with dual filament bulbs only need two. Upgrade to the modern look of LED. Perfect fitment, easily replaces old halogen bulbs. Simple Plug and Play design. Adjustable base allows LED to be positioned for optimal output in a variety of housings. Instant On - No warm-up time. 6000K color temperature. OK for use in projectors. Guest. Guest. Nov 12, 2022. #1. After having burned out both low beams, I bought a couple of standard H4 LED replacement light bulbs. ( See them here -> If working on a 94 or earlier GL1500, replace the black plastic trim and the two screws holding it in place. 41. Holding the rubber back on each mirror, slide each mirror cover back into place. 42. Once in place, gently push each of the mirror cover clips until it latches onto the fairing. 43.

can i replace h4 bulb with led