Greetings!

This is the weirdest thing I've encountered with this truck, and something I've not come across on the forums.

The truck had been functioning fine, doing the daily 20+ mile commute here in Southern California. I woke up in the morning, and it started up just fine...drove to work without any issue. I had previously had some issues with high-idle (2k plus rpm) but it has been a non-issue for months.

I got out of work today, unlocked the truck with the fob and got in...key in the ignition, turned the key and absolutely nothing. No lights, no starter activation...nothing. I pulled the key out and tried again, nada. I looked at the headlights and internal light switches...nothing on that would have drained the battery. I was able to change the auto out of park into reverse, which to me ruled out some random key/stalk issue.

Just as I was about to call AAA I put the key in, stepped on the brakes and decided to attempt to start the car...none of the customary accessory dash lights came on, but the starter engaged, it started to and eventually kicked over and started like nothing was wrong. For whatever reason the idle RPM was over 2k, and the throttle position sensor was at 16% at idle...I don't recall what it had been at previously. Drove home with no issue.

Oddly enough, my UltraGauge and the Radio were "reset" after it turned over, as if the battery had been disconnected... I didn't manipulate the battery terminals at all.

I thought it was the battery, but it's a platinum die hard that's less than 2 years old; I trickle charged it back to life last August, and it's been fine ever since. The alternator is new as well, so I can't necessarily blame that.

I thought it was a security/stalk issue, but I wouldn't expect it to just magically fix itself; I also don't understand how that would make the radio think the battery was disconnected.

We did have a little rain here in San Diego the last few days, so perhaps there was some ECU water intrusion...I'm going to check that out tomorrow when the sun is up.

Aside from blaming water intrusion into the various ECU's, is there anything else I should look at?

Thanks!

 

the first thing that comes to mind are the ground connections,battery to chassis, chassis to engine.....remove them all and clean them to bare metal...at this point the weather may have helped an intermittent ground issue come to light..