Engine Ground Straps

[K0PIR]

I have a 2006 Hummer H3 and have been looking for ground straps connecting the engine to the frame. I don't see any. Am I just missing them?

I'm doing this for a ham radio installation.

Thanks.

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[mjferencak]

I believe I saw a grounding strap by one of the engine mounts the other day.

 

[JPaul]

There is a section in here that shows all the ground locations: http://schwarttzy.com/wp-content/uploads/2013/01/Hummer-H3-Wiring-2008-1.pdf

There is one between the battery negative and the block (in front of starter), and another on that same side between the engine block and the wheel well next to the engine mount. That appears to be it.

I don't see anything going from the engine to the frame or the body to the frame, but there might be something since the diagram shows the trailer wiring ground, fuel pump ground, and license plate lamp ground all being attached to the rear crossmember. Not sure if it's actually attached to the crossmember itself or to the body next to the crossmember.

 

[K0PIR]

When I do my oil change I'll look closer. I know about the one next to the battery. It's attached to the body. I didn't see one near an engine mount though.

The wiring harness in the rear is attached to the frame. I accidentally left it unattached and the engine turned over but would not start. Fuel pump not working I guess. Good to know.

I want to have a couple of grounding straps going from the engine block to the frame if possible. So I'll keep looking.

Thanks!