I'm having an interesting problem with a 2003 Kia Spectra. After this car was jump started the other day due to a drained battery, I noticed that the following no longer work:
- power windows (no power whatsoever)
- power door locks
- backlight in instrument cluster
- backlight in accessory dash buttons
- center dome light when doors are open (works fine when switch is in the "on" position)
- rear defrost
The following still work:
- all meters (e.g. speedometer, tachometer, etc)
- digital displays (e.g mileage, tripometer) in the instrument cluster (but not backlit)
- transmission position LED's (e.g. P, D, R) in instrument cluster are illuminated when necessary
- low/high beams
- brake lights
- turn signals
- center dome light when set to "on" (not when set to "door")
- dash clock
- cigarette lighter
Here are some observations I've made.
- I tested all of the fuses in the cabin fuse box and engine fuse/relay box with a multimeter. They are all fine.
- There were a number of fusible links in the engine fuse/relay box which all checked out fine.
- I disconnected the positive battery terminal for 15 minutes with no luck.
- The battery charges up fine. It was reading 12.6V pre charge and 13.2V immediately post charge.
- The battery passes on a 50A load test for 10 seconds. I know 50A isn't sufficient to fully test the battery, but it's better than nothing. Something could be wrong with the battery, but I suspect it is fine. The car starts up fine with no hesitation.
- I believe the alternator is fine. It charges up the battery and is reading 14.5V at the battery terminals while the vehicle is running. I suppose something could still be wrong with it.
Here is what I have left on my list for troubleshooting this issue.
- Take it to an auto parts store for a free diagnostics
- Test voltage on hot side of all fuses
- Test all relays
- Search for and test any fusible links that may not be located in the in the engine fuse/relay box. Are there anymore hidden somewhere?
Could this be due to a faulty diode near the cabin fuse box? I read that a faulty diode in an '04 Sorento could cause dome light issues.
Could this be due to a faulty BCM (Body Control Module)? If so, would a faulty BCM be reported during an OBD2 diagnostics test?
What else should I check?
Thanks in advance!