Quote:
Originally Posted by sfax
It's worth reposting in both of those threads so that the people who started them and all those that contributed get a notification and may be able to help you
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In the "old days" things like windshield wipers, headlights and heater blowers were controlled by a switch and a fused DC circuit. If the device didn't work it was a bad switch, burned out speed resistor, blown fuse or a broken wire. If there was a problem, a good technician could trouble-shoot it in 5 minutes using a $5 test lamp.
Today we still have the fuses and wires, but the device is controlled by electronic relays that are controlled by remote bus controllers that are connected to a wide-band multiplexed bus, that's controlled by a network of programmed gate arrays, microprocessors and flash memory arrays, (running millions of lines of code) that may or
may not respond to the driver-controlled switch. The technician now needs a proprietary computer tester that costs tens of thousands of $ and can take days to "possibly" diagnose the problem.
Isn't progress great?
