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Alfa Romeo 4×4 switch Wiring Diagram DIY

There are two ways of doing 4×4 electronic switch one is to cut ZN (purple black) or S (pink) wire on I76 relay but since you need to open central console to make 4×4 computer reset switch I’ll describe second way which include cutting (purple black) ZN wire which is #3 wire on G270a connector. Electronic scheme you can see page or two down, you’ll need 2 switches (20A or more preferred) one is for 4×4 switch and it is normal switch (if you can find original Alfa Romeo switch like for fog lights/all 4 direction lights/rear window defogger) other switch 4×4 reset switch should be momentary switch (like reset switch on computer) but normal will work also only you’ll have step more to do, 6-7 meters/yards of 2,5mm2 car wire , flat and cross screwdrivers , scalper or similar sharp object with which you’ll cut wire and strip it (take off plastic/rubber electric insulation ), electric insulator tape (or any electric insulator spray) .

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