Will not start, locks and windows do not work

Good morning,

The first thing I would do is to clean the battery terminals as it sounds like you are losing voltage.

https://www.2carpros.com/articles/everything-goes-dead-when-engine-is-cranked

Also, check the voltage of the battery while at rest and with the key in the start position. Without proper voltage nothing will work correctly.

https://www.2carpros.com/articles/car-battery-load-test

Roy

dealer just replaced battery and all new cables less than two months ago, after leaving battery disconnected over night it cranks sometime. drove it down the road and now I get the same problem. electric locks don't work , windows don't work . then I can go back to it and everything works.

You need to check the voltages as I suggested.

Sounds like a low battery or bad connection.

Roy

I have checked voltage and and pulled and cleaned all cables, same thing dealer told me , when they told me it was battery and cables, and $1,200.00 later I am back with same problem.

Thanks for the help.

You are welcome.

What is the voltage at the battery while resting?

What is the voltage when the key is in the start position?

Roy

12.15 just battery
11.75 with key on
14 with it running

Seems like after it gets warm is when the problems start.

Battery very low. Should be 12.6.

At 12 1 you have less than 25 percent of the battery charge working.

Roy

Then I suppose I need to take It back to the dealer, because they just put the battery in about two months back.

the battery does not seem week, be cause when it will spend over it fires right up. you can wait a while and it fires right up , but once the truck warms up it may or may not turn over and when it wont turn over. all the lights light up on dash and I get all these warning messages. not sure of that helps.

Again, 12.1 volts is very low. It is very weak.

You need to charge to 12.6 volts and then try it again.

Roy