batteries should never have any more than 12.6 volts unless the engine is running! If a battery has a bad cell, it could show good when there is no load on it, but once a large load is placed on it, it can cause a bad cell to short out internally, I would advise that you attempt a jump start, (PLEASE WEAR SAFETY GLASSES AND STAND AT A DISTANCE) as a battery with a shorted cell can explode, I have seen it happen! if the vehicle does start with a jump, replace the battery and retest!
I have tried to jump it and bought a new Batt. Still just clicks and all the dash lights go out.
Batt only had 12.5 volts, I just typed it wrong. It has a (I think) after market anti theft device. It is a little fob like the one for the doors and it has to be next to the key or push the button on it to let it start. I have changed the battery in that fob. I can not find any name on it (inside or out) to contact the company. I had it at the dealer previously and they had never seen this before. They also could not find anything on the truck that would relate to the fob (even inside the steering collum). But the truck will not turn over without this fob being next to the key. Could this fob speak to the chip in the key? Have you ever ran across this type of anti theft?
Ok, look at the attached fuse box illustration and check the indicated fuse, if it is ok, swap out relay #1with relay #2 and restore that starter wire from the last test and see if the truck starts with the key