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It's gotten so hard to be a shadetree mechanic.

I swapped an EJ22 out of a 2001 Subaru Impreza into an '86 BRAT. At least as of 2001, there were still a lot of discrete pairs of wires that a sufficiently savvy person (I.e., not me) could debug with a multimeter. Thank goodness. It was enough fun getting it running without involving CANBUS in the process.

I believe our 2005 Civic was largely discrete pairs of analog wires too, even if it was throttle by wire. It gave me very little electrical trouble.

Troubleshooting the headlights on my 2010 Suzuki SX-4 involved printing some 30 pages from TFM. The entirety of the wiring diagram for my '76 Triumph TR6 fit on three pages. We own a Willys CJ-2A, and the whole wiring diagram fits on one sheet. The wiring diagram for the circuits that actually make it run probably fits on an index card.

When you turn off the headlights in my wife's 2018 Impreza, there's a noticeable delay between turning the switch and the computer deigning to allow you to turn the lights off.




Analog systems can be difficult to troubleshoot too, depending on the issue. I've spent some time scratching my head on some old turn signal systems on old motorcycles before, and their diagrams looked simple... at first. Digital electronics can be a pleasure to work with if you have the right tools, the right information, and the system wasn't designed poorly. The Suzuki and the Impreza aren't just more complicated for no reason -- they're also most sophisticated vehicles that do more things.


It's gonna get worse with 'cybersecurity' requirements making it harder to goof around on CAN.




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