Technical DRL's

Currently reading:
Technical DRL's

I'm sure there are some hacks to the wiring that might allow for it, but odds are the CANBUS system would throw a fit, thus requiring fitting LEDs and proper resistance to compensate for it all.

I'm with you on the lights though, I really wish the bottom part of the tail lights were always on.
 
Totally agree, the number of vehicles driving around in poor weather conditions with just their drl son is appalling. I’m sure that drivers think that they are just more powerful side lights that are showing both to the front and to the rear. My sister in law did until I informed her.
 
Yeah the DRL light situation is pretty stupid in my eyes. Loads of stupid rules for everything but these are alowed in the way they work now. When driving in to misty situations and fog almost nobody remembers to turn their light on.
My light are always on, can't forget them either because the clever people at Fiat ket them turn off when you turn of the car.
 
Ahh, thanks. Do they blow all the time then like other filament DRL's?

Guessing there is a forum favourite LED substitute?
 
Ahh, thanks. Do they blow all the time then like other filament DRL's?

Guessing there is a forum favourite LED substitute?

Hi,
No legal LED replacements for filament lamps I'm afraid. The "no lights" problem is a driver education issue, not regulations or car design. They do not not put rear lights on with DRL's as it reduces the perception of brake lights during the day.

Robert G8RPI.
 
Ahh, thanks. Do they blow all the time then like other filament DRL's?

Guessing there is a forum favourite LED substitute?
Mine's 4 years old this week. Used practically every day. During the week, an hour-long commute each way. No bulbs blown yet... (except the headlights, where I've had to replace both sides)
 
Last edited:
Theoretically, it's possible and wouldn't be too difficult.

The DRL's are always on if the ignition is on, you'd just need to hard wire the rear lights up to a switched live power source, like you would with say a Dashcam.


What effect this would have on the system that monitors the bulbs, I'm not sure.
With the lights switched on, you'll have two lives, live to the rears, the headlight circuit and the hardwire circuit.

I'm not an electrician, but I seem to think the bulbs will only pull the power they need, so it wouldn't matter if they have two feeds, but switching on the original circuit might cause a spike and blow the bulbs.

You can't just cut the original rear light feeds so the light switch only operates the headlamps as that would no doubt cause warning issues with an open rear circuit, perhaps the cut circuit could be looped together so the system doesn't detect an open circuit?

Another option would be to just hardwire in via a switched live some small LED bulbs inside the actual rear light clusters.
Drill the right size hole through the cluster backs and screw/hotglue them into the backing in the correct section.
Something like those LED eagle eye lights.
2 Pcs Red LED Eagle Eye Truck Car Rear DRL Day Time Running Light: Amazon.co.uk: Car & Motorbike
 
Last edited:
They do not not put rear lights on with DRL's as it reduces the perception of brake lights during the day.

Not strictly true G8RPI, many manufacturers have front and rear DRL's. I believe 4 is better than 2 front only.

The current definition of DRL is front only, otherwise they are position lights. Some older requirements may have had rear as well. Guidance here:
https://www.gov.uk/government/publications/daytime-running-lights/daytime-running-lights
includes
"DRL activate automatically when the engine is started and remain on unless the headlamps are switched on. They may however remain off in some low speed and stationary situations. In general all other lights should remain off when the DRL are on but for a limited period some vehicles may be available which automatically activate the rear position lamps at the same time as the DRL."
Which allows for these, but all new designs should be front only.

Robert G8RPI.
 
Hi.
Robert is correct with his description. The idea of DRL is pedestrians, cyclists and other oncoming vehicles are more aware of the vehicle with DRL. There has been many tests and data from all over the EU and it is proved that it has reduced accidents.
Drivers should be aware that like over nearly 100 years lights are still needed to see, when did that change that we can't?
There is no need to have rear lights Illuminated in daylight but again in fog why do some idiots think they are safe with just DRL? Its beggars belief.
Why don't some drivers understand the D means Daylight?
 
Last edited:
with regards these lights
they are quite bright on the front plus the dash is lit too
so its very easy to drive your car in urban ie 30mph areas with good street lighting and not realise your taillights are not lit ive done it

secondly how do i put my parking lights on when i go to see a certain relative who lives on an unlit 40mph street
 
Turn your lights off before stopping the engine. Withdraw ignition key then turn lights on, this gives you side lights. Its all in the handbook. Downloadable from Fiat if you don't have the paper book.

thank you,found it this afternoon on my own car the second ive owned:eek: but this one didnt come with a handbook,

the front bulbs are standard 21/5 watt bulbs as used in stop lights if anyone needs this info
 
Last edited:
Hi.
I replaced the standard 21/5 watt bulbs a year ago with suitable LED equivalent types. Although not pukka they are brighter but not as blinding as some vehicles. Passed the cars first MOT last year fine. The sidelight function reduces their brightness by 75%.
 
Hi.
I replaced the standard 21/5 watt bulbs a year ago with suitable LED equivalent types. Although not pukka they are brighter but not as blinding as some vehicles. Passed the cars first MOT last year fine. The sidelight function reduces their brightness by 75%.

Tbh I've been told they rarely check the headlight's beam Patten during Mots much these days don't know how true it is
 
Hi,
No legal LED replacements for filament lamps I'm afraid. The "no lights" problem is a driver education issue, not regulations or car design. They do not not put rear lights on with DRL's as it reduces the perception of brake lights during the day.

Robert G8RPI.

You are of course and as usual correct. But..... what a b silly idea ti run with half a cars lights on. I cannot see the logic in it and am tempted to rectify it on mine. Perhaps when its drier and warmer.
 
Back
Top