Charge & abs light intermittently on
The past couple days I've noticed my charge & abs lights flashing intermittently. Today was more consistent than yesterday.
I don't have a voltmeter to test different points at the moment so I'm just kind of spit balling for now. However, I do have a PFC so I changed the screen so I could watch the volts. Car starts fine with no problems. PFC reads 11.9-12 volts. If I turn on the a/c the volts drop down to 11.5 and the charge & abs lights come on. If I roll down both windows, voltage drops to 11.6 & lights on again. If I turn the a/c off the volts will go back up to 11.9/12 after a few minutes. If I hit the brakes, same thing, voltage drops to 11.6 & lights back on. Wait a few minutes and the voltage is back up and everything is ok. I checked the belt and tension appears to be good. I've got the battery on charge at the moment. Battery is new, has less than 500 miles on it. It is a 35R battery. I'm not running any crazy audio system, just an aftermarket headunit. What should my voltage reading be on my pfc when idling? I couldn't find an idle voltage in the manual. I'm sure it is there, I just couldn't find it in my searching. Should the voltage drop .5-.6 volts when running the a/c, hitting the brakes, rolling down the windows? Thanks! |
alternator
|
I'd get the alternator tested, as the alternator should be putting out greater than 12v while the engine is running, more to the tune of 13.5-14. All of those things you mentioned will cause the volts to drop, and .5-.6 volts sounds correct, but it's more noticeable since your alternator isn't pushing enough voltage to begin with. Also, it couldn't hurt to check your grounds while you're at it.
|
exactly what Kenseto said, get the alternator tested, should be putting out close to 14V
|
Took the alternator to advance auto parts to get tested. The machine said that the alternator was good. :scratch:
|
Originally Posted by ksu-chewie
(Post 11225573)
Took the alternator to advance auto parts to get tested. The machine said that the alternator was good. :scratch:
|
I think you have a bad diode in your alternator. If normal is 13.5 to14 v then one bad diode would take you down to 11.66 or 11.16v. So your abs and charge lights would start to light up.
|
Not sure what the deal is, but today I drove it to work and my voltage was steady above 13.
|
Mine did the same thing when it went bad, would work for bit then crap out.
|
Originally Posted by BillM
(Post 11230317)
Mine did the same thing when it went bad, would work for bit then crap out.
|
Put a wrench on the alternator pulley bolt and make sure it isn't slipping. My catch can once got a little too full, and sprayed a little oil on the belts. It wasn't enough oil to be visible, but it was slipping.
You may not have a catch can, but FDs are well known for holding their oil. |
All times are GMT -5. The time now is 06:15 PM. |
© 2024 MH Sub I, LLC dba Internet Brands