H4 low beam source?

[E9Wayne]

Hi all, I've got a bulb that seems to be dying (low output and yellowish on one side only). i should probably check the electrical connnections first, in case it's not getting full power, but if it is, where's the best place to buy replacement headlights? I have Hella H4s now. Thanks much

 

[HB Chris]

H4 bulbs can be bought anywhere, the whole light/reflector/bulb is around $50 I think.

http://www.rallylights.com

 

[jmackro]

i should probably check the electrical connnections

Your connections are a more likely source for one side being dim than a failing bulb. Bulbs are pretty digital - either good or bad. But ground connections, connectors, headlight switches, etc. can fail part-way.

Keep in mind that you need to check the current flowing through the bulb - not just the voltage. For example, if the ground is poor, the hot side of the bulb will still measure +12v.