That's a quorum then (whatever that is) and practically unanimous!
Go for those pesky grounds.
What happens Jason, is that the welded and bolted seams between the body panels get rusty and lose some of their conductivity over the years. More so in old Broncos than in most vehicles it seems.
You might even end up having to run either a jumper wire to ground the core support to the fenders and the rest of the body, or simply run a separate ground wire from the light to another part of the body. Personally, I think grounding the core support is better overall. Should help with all the items mounted to it, and maybe even keep future rust to a minimum.
All the more reasons to make sure that your main battery and engine and body grounds are all new, in good solid clean metal, and pretty much connect every aspect of the vehicle together in one system.
The largest of course, goes from the battery to the engine block, as close as is reasonable to the starter motor.
There should also be a direct path between the battery to the body. Usually the inner fender is the most convenient, but just about any body part is workable.
From the engine, there should be at least one wire/strap to the body. The back of the intake manifold to the firewall is the most common and convenient place.
Then there should be (but rarely is) a ground to the frame. Whether a strap from the engine, or body, or directly from the battery's negative terminal is moot. Just get one down there. It can be the smallest of these, since not many things on a Bronco are grounded through the frame (fuel tank senders for one), but you should still have a token grounding plan through the frame.
Your Painless harness might have it's own grounds, and certainly more than the original had, but they all rely on your main grounds from the battery. And those are something that YOU have to put in.
Sorry if you already have all that handled, but it's important to bring up now and then.
Paul
