On mine it's the 9004 plug. They sell them at FLAPS for about $4-5. I keep 2
in the
parts box in the van. I seem to go through them about every year or 2. Even
have relays but the 80/100W bulbs must work over the grounds or something.
I replaced the grounds to be sure to minimize the resistance so the plugs
wouldn't have to absorb that, but it still happens periodically.

bob

On Mon, Oct 26, 2009 at 1:11 PM, Jack R. <jack007@comcast.net> wrote:

> My 84 Westy, original wiring, with H4 bulbs (normal 55w range), has
> developed a "dim" drivers side light on low beam.
>
> Not that noticeable, but obviously dimmer.  The high-beam seems equal.
>
>
>
> Last time I changed bulbs, I used Di-Electric grease and the contacts
> appeared clean.
>
>
>
> Any suggestions as to why the one bulb would be dimmer than the other?
>
>
>
> Thanks,
>
>
>
> Jack R.
>
> 84 Westy Wolfie
>
> Bloomfield Hills, MI
>