This one is near the radius arm bracket and my Catalytic converter though..
There are about 3 or 4 of these types of grounds on our rigs, not sure if I ever had one in that location or not..I know I don't now. In any case, the absence of this particular ground shouldn't have any ill effect on your rig.
I have one from the lower right radiator support to the sway-bar mount bracket but I don't see anything by the radius arm or the cat so maybe the previous owner added or moved one there. You can see the other end of the clip right there on your body bushing mount. They are just grounds that Ford used to connect everything like the firewall to the upper plenum chamber and the negative battery cable to the frame rail and then to the side of the engine block. More won't hurt but less would be bad so find a non rusted spot if you can, and hook it up. Welcome aboard and nice way to pad/increase your post count... -Kevin-
Thanks Steve83 for the diagram... this may make sense as a radio ground strap..
My factory radio has the clock on and turns onto a tuned channel.. but I get no noise from the speakers for like 2-3 minutes.. maybe this ground is to help ground the speakers???
I'll try to re-attach and see what happens.. can't hurt..
doubt it. throw the ford radio in the trash and put in a decent aftermarket unit.