wow, ok
the mass air sensor has 3 wires on the circuit wiring diagram, but 4 wires in real life. There's a red, which is 0v keyoff and 12 v keyon.
black 0 ohms off but 12 volts with key on
ltbl/red 0v both cases, I guess because the engine's not running
tan/ lt blu. This is 0v off and 3-4 volts with key on
I guess I need to ground the mass air sensor, too, right?
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