Hello I recently purchased an xjr and has treated me decently until one day the gauges started to freak out and I lost power to the starter , the wiper went crazy , relays starting clicking repetidly,seat started moving back and fourth , eventually after cycling the key on and off about 40x it seems to fix the issue......until the next time it happens , recently it's still been acting up but now I will come back to what seems like a totally dead battery , no horn no lights , no hazards ,no nothing , except a little red indicator light next the shifter on center console , the only way to fix this problem is to disconnect the battery in truck and rest everything , then she tends to start until , u turn the car off again. Ecm? Ecu? Alternator? I don't think it's the Alternator but I could be wrong , it seems like thers a main power short somewhere or a dirty connection or bad computer , any help on this issue is much appreciated and thank you