Singer alt output

[speedyjuarez Premium Member]

99 Tahoe

275 singer alt

3x yellow tops

80 prs

I noticed my voltage has been low from my 80 prs VM, I was driving on the hwy and it was reading as low as 12.0 with all a/c on and no subs/amps on. I took it to the local parts store to have it checked. 13.8 with out load 13.2 with load. I replaced the Belt because I heard belt slippage but haven't seen an increase in voltage. My two rear yellow tops are about 2 months old and the one under the hood is about 1 year old.

What voltage should I be seeing with a singer alt?

Should I check amperage?

Click to read more...

 

[BEEKAY]

How is it regulated?

EDIT: I also never trust my 80PRS VM. It's so inaccurate lol.

 

[big scott]

ya i say the same thing.

mine reads 13.8 when its 14.4 ..

best thing to do is get a good voltmeter .

 

[big scott]

i use this one and works good.

but im going to get a smd voltmeter.

Xscorpion DVM23BB 3-Digit LED Digital Voltage Display VoltMeter

heres the one i want to get...

http://www.sonicelectronix.com/item_69955_Steve-Meade-Designs-VM-1-SMD-VM1.html

 

[mylows10 5,000+ posts]

Check voltage at the alt. when running. Should see 14+. If not. Possible damage to the regulator

 

[big scott]

doesn't the ecm in the Tahoe control voltage output ?

 

[speedyjuarez Premium Member]

I have a SMD VM-1 but has it off because I didn't have the subs in the truck and the speaker wire was loose. The auto parts guy checked it at the front battery. Not sure on the regulator part but it use to give me 14.8 all day long on my SMD VM1.

Should I check the alt with batterys disconnected?

 

[Falcons 5,000+ posts]

I go off my prs80 as well for now. When I put the alt in I was reading 13.3v. I did the big 3, put a belt on that was a half inch smaller, and changed my battery terminals and now I'm at a solid 14.2

 

[speedyjuarez Premium Member]

Check voltage at the alt. when running. Should see 14+. If not. Possible damage to the regulator

How would I go about getting it fixed?

 

[tc300 10+ year member]

Check voltage at the alt. when running. Should see 14+. If not. Possible damage to the regulator

should it be done after you drive and/or play the stereo for a bit..??

i ask cause i think my alt reg is going out.....

 

[big scott]

is it internal regulator ?

if so you would have to send it back.

if it external then they should be able to send you one.

but you would have to contact them.

 

[big scott]

should it be done after you drive and/or play the stereo for a bit..??
i ask cause i think my alt reg is going out.....

best why of checking the voltage, is turn on your lights, ac or heater...

put a load on it then check.

dont really want to play your system when checking your voltage.

 

[tc300 10+ year member]

best why of checking the voltage, is turn on your lights, ac or heater...
put a load on it then check.

dont really want to play your system when checking your voltage.

ok ive done it that way.. but from a cold start. was around 14.5 but after a couple min of running it was down to 14.1- .0

 

[mylows10 5,000+ posts]

should it be done after you drive and/or play the stereo for a bit..??
i ask cause i think my alt reg is going out.....

Before and after could still be a bad battery to. Even tho it's new. That doesn't assure that it's good

 

[mylows10 5,000+ posts]

How would I go about getting it fixed?

If it's under warranty. Then you need to send it back to be fixed. 1 year parts lifetime labor is the warranty