Hi guys and gals. My first thread, so here we go!
Just thought I'd share my experiences with the above LED bulb replacement and perhaps get more of an insight into why the above bulb behaves very oddly on the Alfa 147!
I bought these bulbs as a replacement for the filament side light bulb, see link below:
Delivery was about 3 days and the whole online order process was very easy. The bulb is basically just a BA9 case (with offset pins) with 6 small 3m LED's squashed onto a very small PCB. The whole assembly has been very, very well made.
However, when I installed one LED bulb into the car, the behaviour was very odd! I guess the majority of this behaviour is down to my lack of understanding of Alfa electrics! The first thing to notice was that the bulb would be very dimly lit, even though the sidelight's were turned off. The bulb would then turn off after about 30secs of so. If I opened a door and caused the interior light to turn on, or used the keyfob to make the indicators flash, the LED would come back on again until all lights went off and then the bulb would turn off a bit after that. When I turn on the ignition, I STILL get the sidelight bulb warning. Does anyone know how the Alfa diagnoses a blown bulb? Does it check the resistance of the bulb circuit or put a very low voltage on across each bulb circuit and check to see if a current can flow?
The only time I could get the LED bulb to light up in all its glory was when I turned on the headlights. Weird!
In any case, these LED's aren't really suitable for the 147 anyway, as the headlamp unit design requires light to be emitted from the side of the bulb, rather than the front as in the case of these LED bulbs.
It was an interesting experiment none the less!