How do I find the output signal wire on my MAF Mass Air Flow sensor? 99 Ford F150 4.6L.

Question

I want to install a MAF enhancer for my HHO system but don't know which wire is the output wire going to the computer (ECU). How do I find this wire?

Answer 1

There are 2 signal wires from the mass air flow sensor. I'm not sure which one goes to the PCM, it is possible for both of them to return as an input. There is a tan wire with a light blue trace in pin 4, and a light blue with a red trace on pin 5. Pin 4 is MAF sensor signal return on circuit 968, and pin 5 is MAF signal out on circuit 967. IF you can get ahold of a wiring diagram, this should help you out.

Answer 2

Use the info below my post for wire colours.

the voltage varies with changes in throttle when you test the wire.

Answer 3

The Signal Out wire (From the MAF) is Light Blue w/ a Red tracer.