It could still be the battery is too low on power. The starter takes the most power to work of any system on the car bar none.
Let it charge up overnight and try again. Or at least for another several hours.
And go from there.
Paul
The reading you got "might" have been correct, or if it was immediately after disconnecting the charger it was probably the initial charge reading. I forget what it's called, but there is a specific name or two (like "float charge" or something, but I forget) for the charge on the battery right after charging.
It should semi-rapidly go down to it's "actual" charge in a little bit. Say, 1/2hr later or so?
Anyway, definitely leave it on to give it some more time and see if it can crank the engine then.
Paul
Well crapola.
But at least you know the key is working so far!
A test you can do while the battery is connected would be to (with the key still OFF) jumper the relay again. Sounds like it tried to start the other day but the battery was only showing 11v so did not have the power. So it's time to find out what is stopping it from getting to the starter.
On the relay, jump the battery power to the "S" post next to it. If nothing happens, then the next step is to jump the battery directly to the starter cable on the other side of the relay. If nothing happens this time, then jump the battery directly to the starter motor itself.
These last two obviously need a heavy duty cable, such as a jumper cable set. But the first one can be done with just a small 10 to 14 gauge wire, or a pair of pliers, or a screwdriver.
If it's easier for you to take the battery in to have it load-tested, then do that. At this point we're just trying to find out if the battery has the power to spin the starter and the starter can crank the engine.
You could also put a volt-meter on the battery while someone turns the key to START. If it drops way down it might be the battery. If it doesn't change then it's something in the wiring or starter.
But since it sounds like it's not even clicking at this point (other than the buzzing of the regulator) checking the other components first seems logical.
Paul
The main purpose of using the body/frame metal as "ground" is as a cheap return path from each "grounded" electrical component back to the battery (-) post. Modern vehicles don't - they use Copper wire (because it's much cheaper nowadays, compared to the cost of all the warranty problems that can occur from relying on the chassis ground) to complete the circuits. So adding a return (commonly called "ground", though it's the exact opposite of grounding) wire system will make almost everything on the truck work better. This shows the return wiring on a '93 Bronco, which still relies partly on the chassis metal:Are there any other connection points for the ground such as to the frame and/or the body?
7 ? 482.5 ? What scale are you using?...how much of a pain in the ass would it be to do it?