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Yes - it's on the grab handle mounting bolt on the passenger side of the dash right? That one relies on the one under the grill to get back to the frame and ultimately the battery negative.

Yeah - since I ended up moving both ends it would have been just as easy to get a new strap and forget about the old one. But now we know!

I've seen a huge voltage drop on that cab ground strap on a 3 year old A1P2 - the voltage drop was causing all the lighting and dash gauges to go out, the ABS had a code stored for retarder relay control. Oshkosh didn't remove the paint on the cab stud and the star washer didn't pierce it...

It's behind the grill - on the passenger side of the radiator tunnel. Other end is under the cab mount rubber stop on the frame and isn't even accessible for a picture. Have to disconnect the CTIS air lines, cut a bunch of zip ties to move wiring and AC hoses then throw tools and swear at if for...

Don't neglect the cab ground under the grill. That one is a TERRIBLE design on both ends. Cab side is laughably poorly designed - on my truck the weld for the stud is so proud of the surface that the star washer they "installed" under the cable just hovers in mid air about 1/8" off the cab...