Halogen/HID FACTS!!

[mc84_zz4]

Do you have a pic of your wiring job? Did you splice into the factory wiring harness?

To run the H4 bulbs you will need one tweak for the low beams, there are 2 pins you can swap, or just buy these pigtails and plug-and-play.

From: http://www.rallylights.com/detail.aspx?ID=120
Note: looking from behind the socket (both male and female plugs), where you have the wires, you have terminals at 9, 12, 3 o'clock, the 12 an 3 o'clock terminals swap.

You can pull those mentioned from the car socket and re-insert them. The high beams (on a 4 lamp setup) need no mods.

If your car has 4 beams, you 'need' to buy a wiring harness that can handle the added load the H4 bulbs will draw.
If you buy the wiring harness, you only need 1 pigtail, as the harness will power the 4 headlights based on lo/hi beam detected.

This is one sample of a wiring harness for H4 lamps in a 4 headlight setup, there are nicer ones by Bosch and Painless, but this is an example:

From: http://www.summitracing.com/parts/GR...3/?image=large#

Also, you can buy H4 bulbs that are Xenon gas pressurized, these are marketed as +30%, +50%, you can also find them on e-bay, they are brighter that regular H4s.
Search 'Osram +50'
http://cgi.ebay.com/ebaymotors/OSRAM...Q5fAccessories


My appologies for the hijack, I thought I would contribute to the last posters question. Although this is really H4 related, not HID, but it seems there is some comparing of pro/con of HID versus H4.