Periodically, my Magnum has a loud ticking noise coming from inside the dash board behind the instrument cluster. This only started after I let the car sit for about 3 weeks. If you turn the car off and restart, the ticking stops. It also stops after a minute or so if you continue to keep it running. There are no other signs of a problem, just the noise. Could this be noise from a relay? Anyone out there experienced something similar? Thanks.