I'm having issues with the electrical system on my 05 lly,batteries go dead overnight. put new batteries in, same thing, today I put the charger on it and it keeps kicking my charger off, but I can hear some clicking in the fuse panel, I found it to be the breaker for PARK LP so I pulled the breaker and no more clicking and it is taking a charge WTF? I have had the truck for a few yearsand when I first got it, if I let it set for more than 2 wks it go dead. Sometimes when I turn it off the transmission indicator [prndl] and the battery light will stay on. Can anybody give me some kind of idea what I am dealing with. I also pulled these codes a few days ago, P0401,P0404,P0405,P0700,P1404,P1621,V0073,V0106,. thanks for any help.

 

Sounds like you have something shorting out that is drawing your battery down get a diagram and trace it from the park lp breaker you pulled

 

how about all those codes?

 

somebody has to know what those codes are

 

P0401: EGR flow insufficient
P0404: EGR open position performance
P0405: EGR position sensor A circuit low voltage
P0700: TCM requested MIL illumination
P1404: EGR closed position performance
P1621: control module long term memory proformance
V0073: ?
V0106: ?

 

Park lamp and egr wiring

 

Thanks for the help I really appreciate it

 

you're going to have to do a parasitic drain test to find out what is killing your batteries over night.

 

Well, you are not going to believe this but I got pissed off and grabed the wire harness and shook the crap out of it and have not had a problem since???????

 

i believe it. i also believe the issue will return if you didn't find the fault and fix it