Attached this video that I found very useful for dentifying MAF sensor voltage supply from ECU and for locating MAF sensor signal wire(voltage varies with air flow_nom 1.9-2.0v @idle).
I probed into the back of the MAF plug sensor signal wire and monitor MAF voltage on the fly in the cab using a std off the shelf multimeter (part of manual boost control monitoring MAF voltage in addition to air flow rate).
Probed to gain elec continuity by slipping a small safety pin in under shrink tube insulation of MAF sensor signal wire (where insulated wire enter back of MAF plug).
Note: when testing MAF with IGN on, use only the battery negative terminal for earth.
https://www.youtube.com/watch?v=a6eaOd3ihiE
As was suggested, use genuine MAF sensor but check circuit first prior to new install.
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