recieved the el cheapo scanner the POS didn't power up. battery was 12.2VDC an there were wires connected to rear of OBD2 port.
I plugged into OBD2 port. then turned ignition to on nothing but black screen. scanner had over44K positive reviews.

 

And now we know the quality control of said unit.
Send it back and order a good scanner or go borrow one.

 

I have a scanner very much like this one Not sure it's "the same", butt sure does look like mine. I use the Torque application on my Android phone, which cost about $5 at the time I got it. Works fine on all the cars I've tried it on including my truck and several other different vehicle mfrs.

Hopefully it's not something wrong with your OBD2 port.

 

I'm gonna test it on the other van. here's what I'm considering next.


w/ torque pro an a marshmello 6 tablet will report back there where wires connected to behind the OBD2 port I'll take an image an post to see if anything looks scheky thanks

RDF1 my start battery was 12.2VDC could it be to low to get any readings thanks

 

12.2V is plenty
You can usually still connect with voltage down around 9volts.

 

Pin 16 is your power wire. Its orange. You need to check it to a good ground and verify you have voltage before condemning the device. If you have no power on Pin 16, The CIG LIT fuse is likely blown. It's showing it to be a 15 amp fuse in the under hood fuse block.

 

I will check power on pin 16 lower right then check that fuse an report back if scanner powers up.thanks for tip.

When I first got the H2 last summer I noticed the throttle body wiring was a bit sketchy but did have throttle control.
the Black to organe an a grey



Not even sure this is the correct TB?








All the wires colors from TB to harness match up except for the extra organe w/ blue tracer wire on the harness end the TB end doesn’t have this organe w/ blue tracer wire so connected a single grey w/ white tracer to this organe w/ blue tracer an have throttle controll.






I now have this organe w/ blue tracer wire connected to a single grey wire w/ white tracer an do have have throttle. image.



When I got the H2 this orange w/ blue tracer wire was connected to two grey wires an did have throttle. Image






Please explain the proper color code for throttle body wiring. thanks for advising

 

I found 07 chevy 2500 trucks schematic of throttle body an pedal but don’t know how to read it.



My H2 has eight wires the left section of this schematic only has six wires.




I’m assuming the abrviations for colors are

YE~yellow,BN~brown,GY~grey,D~GN maybe Green, TN unknown, PU~purple

Only six wires

Where the H2 has eight wires. Could I have the wronge throttle body? thanks

 

In 2007 GM Trucks changed over from the classic GMT800 to the GMT900. Doesn't mean the H2 followed suite.

you need the correct diaghram for the specific vehicle you are working on.

See attached PDF. here is a screen shot.

 

While we are at it, here is the plug pinout so you can get the proper color to the right pin. PDF also attached