WhangareiKE70 Posted February 22, 2012 Share Posted February 22, 2012 Hi guys, My charge light keeps staying on in my KE70. As I drove it home the other night, I noticed that my charge light was on. I immediately checked my alternator belt was on and tight, and it was, so all good there. When I indicated/braked however, the stereo would turn off, the car would keep running however. I think this may have been because of the draw the lights had on the battery. The closer I got to home (it's about 20km to my house) the more my lights and dash lights dimmed. When I got it home we sat it in the garage and checked the voltage across the bnattery terminals, and it was always 12v+ when running. I wasn't quite sure what was wrong, but I had a spare alternator at home which was good so swapped that in. Now everything is fine, no losing power in my lights and indicating/braking doesn't do anything. So not exactly suer what was/is wrong but it seems to have fixed it. HOWEVER. I now have my charge light on the dash light on permanently, even though all other symptoms/problems seem to have dissapeared. Any ideas? I checked all my fuses and none seem to be blown. Is there a relay somewher that I should check, and how do you check relays? Anyway, that's my essay done. I have tried to provide heaps of detail to make isolating the problem easier, but please ask if you want to know anything else, or want me to check something. Let me know what suggestions you have as to what might be the problem. Cheers, Hayden. Quote Link to comment Share on other sites More sharing options...
xsspeed Posted February 22, 2012 Share Posted February 22, 2012 Sounds very similar to what i had in my car when alternator died. Voltage across Battery should be 13.8 when running. Is it an internal or external regulated alt? ?Still k series motor or 4ag Quote Link to comment Share on other sites More sharing options...
zep Posted February 22, 2012 Share Posted February 22, 2012 I don't know anything about 4AGE alternators but the last time this happened to me was due to a faulty regulator (mine's external). It was still working fine but wasn't being told to turn off the light. Quote Link to comment Share on other sites More sharing options...
coldturkey Posted February 22, 2012 Share Posted February 22, 2012 Yeah, your alternator should be charging a lot higher than 12V. And a battery thats reading 12V is not fully charged. Quote Link to comment Share on other sites More sharing options...
Hemi Posted February 22, 2012 Share Posted February 22, 2012 yup yup , check batt voltage when everything is off and engine is not running , then flick on your lights and turn motor on . check the voltage , as said above it should between 13.8-14.4vish i have also come across the problem where the voltage regulator refuses to tell the light to turn off as zep siad Quote Link to comment Share on other sites More sharing options...
WhangareiKE70 Posted February 23, 2012 Author Share Posted February 23, 2012 Yeah, voltage was up around 14 ish, I checked with Dad as he was the one reading the meter. I just said 12+ as i wasn't sure on the exact number. It's a 4AGE as well. Internally regulated alternator. Any ideas on how to fix this? Quote Link to comment Share on other sites More sharing options...
xsspeed Posted February 23, 2012 Share Posted February 23, 2012 Weird that you are getting 14 and the charge light. The regs on these do die. I have a document with a load of trouble shooting ill try dig it up. Quote Link to comment Share on other sites More sharing options...
Llama Posted February 23, 2012 Share Posted February 23, 2012 If your alt even has one, the rectifier diode pack could be blown. Happens all the time to Bs. Quote Link to comment Share on other sites More sharing options...
bigfoot Posted February 23, 2012 Share Posted February 23, 2012 my daily (st171 corona) has had the battery light on for about 18 months since the battery terminals got shorted (was being driven by previous owners gf), i got car to town and put my spare cressida alternator on. Charges at 14.3v and havn't had a problem but the light has been on since Quote Link to comment Share on other sites More sharing options...
Yammies Posted February 27, 2012 Share Posted February 27, 2012 how many terminals does the alternator have? Check you have a good connection to the light wiring, there may be a breakdown causing low voltage on one side allowing the light to stay on - normally it requires voltage on both sides of the light to turn it off, assuming that the field is running through the light. Quote Link to comment Share on other sites More sharing options...
KKtrips Posted February 27, 2012 Share Posted February 27, 2012 I would recheck the charge rate with the multimeter on the battery terminals rather than on the alternator pins - it definitely sounds like the alternator isn't charging OR the battery has very much shit itself and is short circuiting.. Quote Link to comment Share on other sites More sharing options...
WhangareiKE70 Posted February 27, 2012 Author Share Posted February 27, 2012 I would recheck the charge rate with the multimeter on the battery terminals rather than on the alternator pins - it definitely sounds like the alternator isn't charging OR the battery has very much shit itself and is short circuiting.. Everything was checked from the battery terminals. Will re-check again tomorrow, and give an update. Car is running sweet, but light is still on. I have been driving this almost every day since the problem has come up. Quote Link to comment Share on other sites More sharing options...
Esky_addict Posted May 21, 2012 Share Posted May 21, 2012 have you fixed the problem. my holden does the same. drives fine with lights on charging battery etc. Quote Link to comment Share on other sites More sharing options...
Taistorm Posted May 21, 2012 Share Posted May 21, 2012 Had the same problem with my ae82 Corolla a while back. Replaced the voltage regulator and problem was sorted. Quote Link to comment Share on other sites More sharing options...
Esky_addict Posted May 21, 2012 Share Posted May 21, 2012 oh yeah. ive put a brand new external reg on. faulty maybe? Quote Link to comment Share on other sites More sharing options...
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