2003 Hyundai Sonata Q&A
2003 Hyundai Sonata Question: I'm having a problem with the charging system.
The car was working fine until a couple weeks ago. Was on my way home from a day of driving and I noticed the clock display was dimming. I turned everything off and the car got me home, but I basically had no battery left... no lights, no signals, nothing. The battery is working fine, the Alternator is working fine, and the CPU was pulled and tested and is working fine with no faults. One mechanic has already spent 2 hours checking all the wiring and can't find a problem. What is wrong with my car??? - elitediner
Obviously nothing now, IF all those componets checked out ok!! How much voltage is the alternator putting out when tested at the battery is what we need to know! Must be an intermittent problem. - pushrod
CK ALT AND SEE IF ITS CHARGING A GOOD 14.2 VOLTS - globalhelper
I had the smae problem this month on my 2003 Hyundai Sonota,2.7. Put 3 Alt.'s in until I found a good one. My problem would happen at speeds over 50. It seems the parts house I bought them from had a bad diode and would check good until at speed. Changed brands and works just fine now. Went with a factory model. Exspensive!!!!!!! - grnberet64
Did you ever find the problem? I am having exactly the same problem with my 2003 Hyundai Sonata 2.4L.I replaced all belts, alternator and a new battery. While driving, first the radio cuts off, then when you turn the ac on, the fan starts blowing slower and slower and lights dim. Did you find an answer? - TonyInFlorida
My daughter is several hours away with a car that is apparently "dead"( no previous problems of any kind). There is not a single sound when she turns the ignition (nothing was left on prior); obvi...
I took my 2008 Hyundai Sonata with 56,000 miles on it into the dealer to have the air conditioning unit looked at because it blows warm air -- basically when I'm driving slower around town, but it ...