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Hyundai Santa Fe Electrical Problems

28 messages,  Last post on Dec 02, 2009 at 7:42 PM

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#1 of 28 Sante Fe 01 acting up by dorvason May 08, 2007 (4:52 am)
2001 Hyundai Santa Fe, with only 57,000. I bought it 5 months ago, and noticed when I drive at night (mainly) if I press any button in my car, and even the brakes, the car lights with dim, and almost sound like it is going to kill my car. Then a few days ago while idling my RPMs would drop really low, and the radio as well as lights would dim, and the car almost sounded like it was about to stall. Please some one help me. Replies to this message: pelican19 (May 08, 2007 5:18 pm)
#2 of 28 Santa fe 01 Acting Up by retiredpilot May 08, 2007 (8:38 am)
Sounds to me like you probably need a new battery. Could be your alternator is starting to go also but I would have the battery checked first. Replies to this message: dorvason (May 08, 2007 10:09 am)
#3 of 28 Re: Santa fe 01 Acting Up [retiredpilot] by dorvason May 08, 2007 (10:09 am)
Replying to: retiredpilot (May 08, 2007 8:38 am) Thank you I will get that checked
#4 of 28 Re: Sante Fe 01 acting up [dorvason] by pelican19 May 08, 2007 (5:18 pm)
Replying to: dorvason (May 08, 2007 4:52 am) I agree. Have them both checked but your issue sounds like the alt. Once the car is started you can disconnect a battery. The alt. will run the car on its own. If this problem has persisted for some time your battery may be beyond the point of holding a good charge.
#6 of 28 Anyone having electrical problems after 07 S.Fe. gets wet? by jcwsbltd Jul 23, 2007 (5:49 pm)
07 Santa Fe Limited FWD 3.3L - after many months it finally rained here in Phoenix (bought the S.F. on 4/30/07 - hasn't rained at all 'til tonight!!!). After going through heavy water, I looked down and noticed the "ESC Off"warning light was on. Went to turn it back on and it wouldn't go off.   When I got home and turned the engine off, I re-started and everything was fine. Turned the ESC off then back on and it worked normally.   Assuming it wa a temporary short from high water spraying up, and after I had to have my external Temperature Sensor replaced after going through a car wash when i first got the car, I'm wondering if there is any shielding to the on board computer and wiring.   Anyone else had similar problems in the wet - i.e. temporary shorts, replaced temp. sensors? Replies to this message: jcwsbltd (Jul 24, 2007 10:50 am) jcwsbltd (Jul 24, 2007 3:44 pm) plantinumson (Nov 01, 2009 2:27 am)
#7 of 28 Re: Anyone having electrical problems after 07 S.Fe. gets wet? [jcwsbltd] by jcwsbltd Jul 24, 2007 (10:50 am)
Replying to: jcwsbltd (Jul 23, 2007 5:49 pm) If the "ESC Off" warning light comes on after being shorted by the rain, how likely is it that it is just the sensor, and how would you really tell if the ESC had turned itself off? 'Cause that's a safety issue. I'll just have to see if it happens again and whether it left an error code on the computer when I next take it to the shop. Replies to this message: jcwsbltd (Jul 24, 2007 3:44 pm) plantinumson (Nov 01, 2009 2:27 am)
#8 of 28 Re: Anyone having electrical problems after 07 S.Fe. gets wet? [jcwsbltd] by jcwsbltd Jul 24, 2007 (3:44 pm)
Replying to: jcwsbltd (Jul 24, 2007 10:50 am) Hmmmm - turned out to be a faulty brake light switch at the brake pedal - rain had nothing to do with it- the ESC circuit was detecting a short at the switch breaker and gave the correct code to the computer- switch was replaced under warranty - all is well again. Not too hapyy, though, that I've had it just under 3 months and had a temp. sensor and the brake light switch replaced. Hope that's all to do with electrical stuff.
#10 of 28 blowing ecu 10 fuse by shadowsplay Apr 07, 2008 (5:39 pm)
I have a 2001 Santa Fe: I started having a problem with it blowing the 10 amp ECU fuse under hood. It had only done this once before and the fuse was replaced. Now it blows the fuse after I try starting it up. Any suggestion on where to look for the short that could be causing it to short-out?

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