whats going on here? my old alternator never did this?? and i have a test with the alternator to prove it was a good one? somebody please help me as i cant drive it like this....

 

voltage rectifier (think its called that) will be faulty

 

ive put two brand new alternators on though? they cant both be dodgy can they?

ive rewired the blue wire straight from back of alternator to back of clocks too.

but with even this wire disconnected it still charges so i cant imagine it being this??

 

If it's two new alternators WITH new regulators then they are setup wrong.

The alternator created the power and the regulator regulates that power to the desired amount, i.e. not too much like what you have nor too little.

Blue wire is the field excitation wire and comes via the warning light, with this disconnected you should have no charge at all, unless you are revving the car fairly hard then checking?

Do you have the correct item fitted?

Martin

 

thats the one ive bought? is there any inline regulator i could buy from maplin or somewhere??

 

No, the regulator on the alternator is whats needed to do the job, so have you touched the regulation side?

Martin

 

http://cgi.ebay.co.uk/ws/eBayISAPI.d...:X:RTQ:GB:1123
sorry that one

 

nah ive not touched nothing just bolted it straight in?

 

It has to be a regulation problem, it's worth, as a test, fitting the regulator from the old one to the new, and then see what the outcome is.

Martin

 

there are a set of bolt s for wires and also a plug for the leads. i have the red wires on bolts and blue wire via the plug? this wont be the reason will it? i mean i dont need to either use just the plug or just the bolts? and that alternator is correct isnt it?

 

[quote=martysmartie;5777921]It has to be a regulation problem, it's worth, as a test, fitting the regulator from the old one to the new, and then see what the outcome is.

Martin[/quote

ill try my old regulator then and see if that helps cheers

 

I assume you wired the same as the old one? Generally it's only possible to connect the heavy duty output to the one and only correct terminal.

Unplug the blue wire, what happens?

Martin

 

i tried it without the blue wire in and still nothing?? just charges at 16v-19v? somethings noth right?

 

No it's not, did you rev it first?

Martin

 

i think i did i bit but ill double check it tomoz mate coz i got a bit to do tomoz onit anyways. its really annoying lol.
its not going to be anything else is it? defo summat do with alternator?

 

deffo an alternator prob after the alt and regulator there is nothing else that can bump up the voltage like that unless you have a faulty voltmeter, have you tried your meter on another car just to eliminate it?

 

yeah plus ive had the first alternator checked by an auto electrician and it was pulling 19.3v , ill try old regulator then i think. i use my voltage gauge to check up onit and its fairly accurite. think ill just scrap it off haha

 

Yes try that as it sounds like they may both have duff ones.

Martin

 

Is your high voltage reading your getting at the battery or have you been checking onthe back of the alt,Also rectifier is common to go on the a127 but the fact you have two new ones fitted its seems hard to say

 

I wouldn't discount 2 faulty units. I did 3 in a row (QX Components IIRC). On each unit, the first time I went beyond 5.5k rpm the battery light came on and the alternator died. I replaced it with another branded unit and was fine ever after.

Lee

 

as above worked in the trade long enough to know that just cus a part is new doesnt neccesarily mean it is good or works proper

 

You have the red wires on bolts (multiple)? You should only use the M6 (10mm spanner) bolt! This is the B+. The other bolt is the W (M5).
Do not use this one, it is for a rev. gauge. It is AC, not DC and will produce about 30 volts.
So both thick red wires on the one B+ M6 bolt!

 

I have both reds on 10mm ill have a look tomoz n c what happens n let u all know cheers for help guys

 

For some reason my alternator has seemed to cured its self?? Not over charging at all now? Any reason?

 

That says it all..... they should come with a "warranty return form" attached to the receipt

 

Every one of them I ever booked got sent out with a quote for a Remy one

 

Do you think it could have been your tester/multimeter???????????
Seen them over read before

 

Maybe but had it at the auto electricians n tested.