anyone fitted LED indicator bulbs, and if so did they work -
a) without load resistors b) with load resisitors?
The BCM does indicators, AFAIK, and thus there isn't a flasher unit to either replace or doctor, unlike the earlier models. Chances are it'll go apeshit with "wrong" loads...
Surely only the thermal flasher units go ape s*it with wrong loads. I'd expect a computer just to toggle the relay drive at the same rate regardless. If there was some "bulb blown" detection it might vary the rate as an indication.
I would have thought that too, so why do modern cars with EBCM flash the inidicators with a different cadence when the hazards are on? The amount of on-time is distinctly shorter.
Alex
On or around Mon, 14 Dec 2009 12:34:55 +0000 (GMT), "Dave Liquorice" enlightened us thusly:
nah, there's a requirement to have a bulb-outage indication by flashing at either faster or slower pace. Thermal flasher units flash very slowly or not at all with only 1 bulb in place (eg old series motors) - electronic units have load-sensing and use this to make it flash (usually) very fast. Putting LEDs instead of bulbs makes the unit think a bulb has gone. However, on those, the bulb-outage can be disconnected on the circuit board - easier if you can identify the corrcet pin of the little IC is the bulb outage signal. The more clever electronic ones also have load sensing for more-than-normal bulbs, and use this to flash a trailer light on the dash. This is why the trailer light if you have one flashes when you run the hazards. thing is, the DII doesn't have a flasher unit as such, the lights and flashers and so on are switched by the BECM via relays. I suppose I could remove a bulb and see what it does. It's not immediately obvious how it does bulb outage sensing, if it does.
doesn't answer my question though :-)
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