You can do this with some resistors on a 7443 plug I THINK....not sure though, by nature of the 7443 bulbs when the blinker comes on it just lights the second filament and making the bulb brighter...

This was my wild guess.....I figure that pins 1 and 4 would be either a "turn signal" positive-green/yellow(parking light) and a negative since 1 and 4 already appears on the 7440 plug(06+) as well

...with that said, 2 and 7 would be the "parking light" positive-red/green which is not on the 7440(+06) harness, but i was iffy on both of these being red/green wire...maybe one is another ground? whatcha think?

There is 1 ground. 2 wires turn the dual filaments from either side.

great thanks.....aww crap, i've been sayin 2 and 7....i meant 2 and 3

pins 2 and 3 is the red/green parking light wire

I'll try this over the weekend and see if i can fabricate/rig the existing 7440(06+) plugs. :biggthumpup:

what does this mod do?

to keep the signal light on when you turn on your headlights.. just like the '03-05 headlights

What I don't understand is, I went to Advance Discount Auto and they said I had 7440 (plastic base, wedge style) but the bulbs I pulled out of my headlights were glass base, wedge style, which from what I can tell is a 7443 style.

When I look up Chrome Amber 7443 bulbs online (since I modified my 05' housing so it has a clear turn signal lens) they all have the plastic bases, am I missing something here?

Links:

7443 Style

7440 Style

^^i think it can have either a glass or plastic base and still be the same type of bulb...i think the difference between the 7440 and 7443 is that one has a dual filament that produces two levels of lighting(parking light and a brighter one for turning)...where the other has one filament that blinks on and off. That's my best guess.

Yeah that's what I was guessing too but, I didn't want to order something that wasn't going to work!!

So to clarify...

7443 has a dual filament (stays on, but when you use your turn signal it gets brighter)
7440 has a single filament (only comes on when using your blinker)

Correct?

Yep, I have both 7440 and 7443's with glass bases so that is not what differentiates between the two

yep, the best thing to do is to make sure is that you get the 7443 bulb for the 03-05 headlights, regardless if it has a glass or plastic bottom. that guarantees the dual filament.

Well I'm ordering Chrome Amber bulbs, which aren't a highly available product (I don't think there are a ton of companies that make bulbs like this). I just ordered the 7443 Chrome Amber bulbs from eBay that I linked to a couple posts ago. I'll let you know how it goes.... I was so mad when I realized I had to put the headlights BACK in the car, only to remove them again later to change the stupid turn signal bulb! DAMN!

Hey how did these work out for ya ? Im wanting to put switchback leds in for my turn signals so would i have to change my 03 sedan turn signal socket to the 7443 socket then install ? And since its a LED would i have to deal with hyperblinking ? ANY HELP WOULD BE APPRECIATED

There isn't hyperblinking from the switchbacks in my experience, however if you also bought the socket from the site, keep in mind to make it work, you have to wire the GREEN wire on the socket to the ground wire. The other two wires RED and BLACK on the SOCKET will be for blinking and parking (not sure which order). But the key part is the way the switch back is made it's different in layout than the socket from the site. Testing is your friend.

So let me get this clear before I go cutting up wires on my newly purchased headlamps.

What I need to do is source a 7443 pigtail with the three wires, splice the power and ground wires into the 06 harness and then tap the extra third wire into the power wire of the city-light, correct?

I am also assuming I'll have to buy a new bulbs because I doubt the OEM bulb in my 04 lights are orange since they used an orange lense cover.

Looks like I am heading to the auto-parts store!