Charging system/headlights

Tiny
MCOLLINS1312
  • MEMBER
  • 2004 HYUNDAI TIBURON
  • 2.0L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 183,000 MILES
Charging system lights (parking brake and battery) came on upon start one day back at the first of the year. (It was still cold out.) I took it to local AutoZone and they tested it. Said alternator and battery bad. Replaced both. Rest of that day the lights were out and I assumed was fixed. The next day I start my car and they are back on. When I hit 900 RPM they went out. Still to this day the same point they go out. So when started, low voltage readings. When hit the 900 mark they are normal. However, when driving or just sitting, I get random spikes where I’ll be running a high voltage over 14.8. My fan speed goes higher than the setting, even if it is on 4 which is the highest setting. My headlights will also blow but no other lights have blown while this issue had been present.

I have replaced the fan switch but that didn’t not fix anything. Have checked fuses and relays. Don’t see anything in wiring to cause an issue. Have not been able to figure this out! Been going on for 5 months at least.

All I know to do is put in line fuses in and buy bulk fuses for the price of bulbs so I just replace a fuse instead of a bulb and carry fuses with me to replace when they blow. I would really like to just get it fixed though.
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Friday, July 26th, 2019 AT 5:47 AM

7 Replies

Tiny
SCGRANTURISMO
  • EXPERT
Hello,

This is probably a problem in the wires or the connectors from the alternator to the battery. In the diagrams down below I have given you a wiring diagram of your vehicle's charging system(with wire to be checked highlighted), as well as instructions for the preferred method to check them, voltage drop testing. You will need to use a multi-meter to do this, so here is a link for you to go to if you are unfamiliar with how to do that:

https://www.2carpros.com/articles/how-to-use-a-voltmeter

Please go through these guides, if needed, and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros
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Friday, July 26th, 2019 AT 3:05 PM
Tiny
MCOLLINS1312
  • MEMBER
Hey. Thanks for that advice. I forgot to mention myself and my dad have both looked things over with a meter and checked wiring, connectors, and grounds.
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Friday, July 26th, 2019 AT 9:52 PM
Tiny
SCGRANTURISMO
  • EXPERT
Hello again,

Okay, have you checked the alternator drive belt? In the diagrams down below I have included diagrams of your vehicles drive belts and instructions on how to make adjustments to your alternator drive belt. Please go through these guides and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros
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Saturday, July 27th, 2019 AT 1:41 AM
Tiny
MCOLLINS1312
  • MEMBER
Yes. It checks out well. This is such a weird issue! Everything seems to be fine but there s something somewhere. Also, this morning I notice the light for just the fan speed will be lit like it s supposed to be or will dim and even go out. Could be completely unrelated, unsure, but my cigarette lighter quit on me while I was driving today after my fan speed sped up on its own light I described in original post and the fuse is not blown.
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Sunday, July 28th, 2019 AT 4:40 AM
Tiny
SCGRANTURISMO
  • EXPERT
Hello again,

Okay, so the fan light and the cigarette lighter could be a problem with Ground #11, which is located behind the center of the center console. In the diagrams down below I have included the Ground Distribution of the cigarette lighter and instrument cluster of your vehicle, as well a picture of the location of Ground #11. Also I have included instructions for how to properly check a vehicle ground. Please go through these guides and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros
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Sunday, July 28th, 2019 AT 7:53 AM
Tiny
MCOLLINS1312
  • MEMBER
Grounds are good and the cigarette lighter was the fuse in my USB charging adapter.
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Wednesday, July 31st, 2019 AT 8:41 AM
Tiny
SCGRANTURISMO
  • EXPERT
Hello again,

Okay, can you check the wires that I have highlighted in the Interior Lighting Wiring Diagram in the diagrams down below. I have included instructions for how to check to high resistance or problem segments in circuits as well. Make sure that the pins on the connectors are not bent, damaged, or have excessive resistance in them. Please get back to us with what you are able to find out.

Thanks,
Alex
2CarPros
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Wednesday, July 31st, 2019 AT 11:14 AM

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