"Harry Bloomfield" wrote in message
news
Michael Chare formulated the question :
I presume cars are made a economically as possible, so is it really the
case that a rear light unit with LEDs and driven by CAN bus, with two
thin wires for the power and two even thinner wires for CAN-H and CAN-L
bus is really cheaper to make than one with convention bulbs and much
thicker wires?

The modern system does not make connecting a trailer light socket easy!

Actually, it makes it easier and it can be more clever. One thick wire as
the main supply, then thin wires can be used to pick up the signals. The
trailer lights can be monitored and issues fed as data down the can-bus.

It's all far too clever IMHO. Take the seat sensors, if I bung a shopping
bag on the passenger seat the "fasten seat belt" command/bleeper goes barmy.
I realise it's all designed for dumbarses but c'mon.
With other probs, you take it to a dealer who sucks his teeth and hasn't a
clue. Whatever the diagnostics tell him it gets changed, charged for, and
still has the prob.
The poor back-street garage who i've used for 52 years is totally buggered.
Progress/profit.
The day we get driverless cars i'll be hopefully dead.