I managed to loosen the wrongly installed jam nut on the brake light switch by cramming a 14mm flare nut wrench into the tiny opening and miraculously budging it just enough to let the switch turn loose. But it seems like the switch is not the source of my trouble. The brake lights are still...
I just got the instrument panel out so testing the switch while it is installed is my next move. FWIW, I managed to get the panel out of the way without unplugging the speedo cable which I was having trouble getting loose.
Brake lights are not working on my '76 FJ40 so I figured I'd have a go at the brake light switch. Here is what it looks like from below:
In the description I have, it says there are two "adjuster nuts". But it sure looks to me like that black nut there is welded onto to the mounting plate...
This is great info. Thank you! I did double check my grounds. I added a ground from the starter up to the battery, like you suggested, and another from the battery to the block. Since the truck is starting okay, I guess I'll move on to another project (for now).
So, I tried a 2nd starter and the results aren't much different from the first. I ran a new ground strap, and added two more grounds, but that also didn't seem to make much difference. The 40 starts up great, despite all the noise. ¯\_(ツ)_/¯
The old starter in my '76 FJ40 has been flaky for quite awhile now. It will usually will start the truck, but sometimes just makes a x10 slower than normal turning sound before maybe starting it. So, I decided to try one of these newer GRS starters...