Sometimes when truck is unlocked and I get in and turn the ignition nothing happens - no crank, no lights, no radio - nothing. if I try it a few times it fires up and dash etc is normal. The other day it was locked and the key fob wouldn't unlock it, no lights flashed etc - try a few times and finally worked. In these instances it's like there is no battery in it. I changed the battery because I knew it wasn't good. Day after I put battery in - truck fired right up but dash and radio blinked on and off rapidly for 20 or 30 seconds. Today fired right up but dash lights all lit up normal, radio, heater etc came on , then flashed off, came back on . After it does the flashing thing I often get a "Service trailer brakes" error on the dash, which disappears on the next start. Any ideas where my issue is?
