Well today I pulled the back seat in my daughters new 2004 fx4 crew and got the code off the keyless module...punched it in and it worked once then keyless module started clicking security light is flashing and nothing works ie key remote truck seems locked up ... Disconnected the battery but still clicking and locked no start
Any ideas would be greatly appreciated

 

Okay well I figured it out apparently the battery was weak...got it charged and now seems as if everything is back to normal

 

Thanks for posting the fix. We sometimes forget that these trucks require a lot of juice to function. A weak battery causes them to do some strange stuff.