Alternator Question

suprabahamut · 01-28-2009, 02:13 AM

I noticed on the voltmeter in the car sometimes reads 12 to 13 volts. I wanted to know does the alternator have a sleep mode? I use to have a Honda and when the alternator would do a sleep type mode, it would stay at 12 volts until the electrical system demanded more voltage. So I wanted to ask. I am going to check the battery with the car on tomorrow with a DVOM ,but it mostly happens when I am driving. I wanted to check if anyone knows if it is the same type of alternator.

tak2099 · 01-31-2009, 09:14 PM

what does the gauge do when you have the rpm above 2k?

suprabahamut · 02-02-2009, 03:32 PM

After it has been running for probably 30 minutes, it will be at 12-13 volts even at 2k. But for cold starts to about that time it will stay at 14 volts. That's why I thought it has a sleep mode. If I turn on the lights it will go to 14 volts but after a while go back to 12-13 with the lights running.

01-28-2009, 02:13 AM	#1
suprabahamut 3" Exhaust Join Date: May 2007 Location: greensboro Posts: 242	Alternator Question I noticed on the voltmeter in the car sometimes reads 12 to 13 volts. I wanted to know does the alternator have a sleep mode? I use to have a Honda and when the alternator would do a sleep type mode, it would stay at 12 volts until the electrical system demanded more voltage. So I wanted to ask. I am going to check the battery with the car on tomorrow with a DVOM ,but it mostly happens when I am driving. I wanted to check if anyone knows if it is the same type of alternator.

01-31-2009, 09:14 PM	#2
tak2099 3" Exhaust Join Date: Jul 2007 Location: ohio Posts: 90	what does the gauge do when you have the rpm above 2k? __________________ 1988 supra turbo. In process of modding:Roll cage, seats, dp, 3" intercooler, fuel upgrades, and turbo upgrades next.

02-02-2009, 03:32 PM	#3
suprabahamut 3" Exhaust Join Date: May 2007 Location: greensboro Posts: 242	After it has been running for probably 30 minutes, it will be at 12-13 volts even at 2k. But for cold starts to about that time it will stay at 14 volts. That's why I thought it has a sleep mode. If I turn on the lights it will go to 14 volts but after a while go back to 12-13 with the lights running.