Daytime running lights

[Sunderas]

HP19? Can't even find them!

[van ordinaire]

The good news here (Spain) is that driving with foglights on when there is no fog is an offence - points and fine.
The bad news is that traffic police almost never enforce it.

Just like here & now (except for cars with OE pearl necklace DRL's) it's not so easy to tell if front fogs are on. Some models even use a reduced wattage feed to the fogs for their DRL's!

[xf1ref]

HP19 and HP24 can be replaced by led . I have replaced my cornering HP19 bulbs with led and I had to use also a 10ohm 25W resistor in paralel with the led.

[GiveMeABreak]

I'm waiting for the summer and then I'll have a look at doing the HP19s, as that means more work with fitting resistors like you say. It would be great if you could post a picture of the inside where you wired in the resistors and anything else that would help doing the job. Thanks for posting those pics.

[xf1ref]

Here is a picture inside, the resistor is glued on the cover and connected in parallel...it doesn't matter polarity.
The led's are from aliexpress
https://www.aliexpress.com/item/2pcs-Fr ... 0.0.PZO3Ai

[GiveMeABreak]

That's really helpful - thanks for taking the trouble to post it up!

I have seen some installations of the resistors bolted onto metal brackets near the radiator fan housing and did not like this prospect very much! Your solution seems perfect and keeps everything protected within the light housing. It's a shame there aren't more LED options available in Europe as waiting up to 60 days for delivery from China is a bit long, with all the delay in returning them if they are not bright enough. I see you have the original LED strip light on your car for the DRLs. I've already upgraded my HP24W DRLs - so I'll have to keep searching to see if those HP19s will become available on ebay or similar!

Thanks again.

[myglaren]

They usually say around 60 days but in practice are often much faster - I've had stuff from China and thereabouts in four days.
Most recently some storage boxes in 5 days.
Faster than domestic post.

[GiveMeABreak]

That's interesting to know Steve, ta muchly.

[xf1ref]

I think this led's are the brightest version but I don't know how long they will survive. When I tested the resistor I noticed that is becoming very hot after aprox. 1 minute but for cornering light this is ok because the running time is generally small. Just in case, with the resistor glued on cover I do not recommend to stay with the cornering light on more than 1 minute.

[Paul-R]

What value is the shunt resistor? Where did you get the information for that value from? Perhaps a higher resistance would work with the CAN and would certainly dissipate less heat.

[xf1ref]

I supposed if the bulb have 19W, the resistor have to be equal or grater and also it applies for resistance. I found the value for resistance in the link below but I think, as Paul said, perhaps is working with a higher resistance that will dissipate less heat.
Until now I changed with led's the cornering lights and all interior lights (including trunk and door lights)
http://www.planete-citroen.com/forum/sh ... p?t=147437

[GiveMeABreak]

They generally are in 10W, 25W and 50W resistances, but as the LEDs are not actually 19W I'll be checking what I need using Ohm's law. If the resistance is too big, it'll likely dim the LEDs!

[Paul-R]

They generally are in 10W, 25W and 50W rsisistances, but as the LEDs are not actually 19W I'll be checking what I need using Ohm's law.!

Marc - those are the power dissipation characteristics. What, err, resistance are the resistors? You can certainly work out the resistance if you assume that they are dissipating the full amount at working voltage but if they are being underdriven the assumption fails.

If the resistance is too big, it'll likely dim the LEDs!

That would apply if you wire them in series, these are surely being wired in parallel to shunt some extra current to fool the BSI.

[GiveMeABreak]

The descriptions of some of the items on the market are not very helpful Paul, especially when it comes to watts, as they often quote what bulb the LED is replacing and not what the actual product is. Still haven't found anything I like as yet!

Yes, the resistors will of course be wired in parallel, thanks Paul.

[Paul-R]

I'm tying to find what resistance the shunt resistors are (and where the information came from) as I strongly suspect that they are simply too low if they are getting hot to the touch.

If you think about the canbus compatible LEDs they have an in-built shunt resistor and, being surface mount, they are tiny and therefore must be higher resistance than these separate resistors.