Code P0102 - MAF Sensor Low Input
I'm looking for some help. I have a 2001 Impala (3.4L) that started throwing a check engine light accompanied by a p0102 code a couple months ago. Realizing it wasn't serious, I decided to wait until the weather got better to try and repair it. Since its been nice outside the last few days, I picked up a replacement MAF from a local parts yard and installed it. After I cleared the code and restarted the engine, the check engine light and the code came back.
So...either I have a faulty MAF from the yard or something else is wrong - my guess is the latter. I'm assuming that a wire must be broken somewhere, but I have no electrical drawings for that circuit - can anyone provide one?
Also, I've checked the voltage between the orange and black wires on the connector and I have about 14.4V - which seems right, but I have no way to check the voltage on the yellow wire (which I assume is the output). Any ideas what to do next??? I'd appreciate any help.