will check rectifier aswell. also tried a load test but voltage justt dropped to 11.3v then when load was switched off it only went to 11.5v

the brushes were around 10mm on replacement. do you think i should buy replacement regulator/brush pack as there quite cheap compared to new alternator and singles that component out?

I think you meant "regulator" not rectifier - that is fixed on to the end of the alternator if its a Bosch.

 

Unfortunately it now looks like you probably have a U/S original alternator, and you have probably bought a U/S second hand one and that is causing confusion.

 

If you were really lucky, the (no)charge warning light would be lit when the alternator failed.

"do you think i should buy replacement regulator/brush pack as there quite cheap compared to new alternator and singles that component out?"

 

 

Yeah, probably, but I still wouldn't necessarily conclude that just because the battery is only 3 months old it is OK.  If it hasn't been getting charged properly, it will deteriorate very fast.  Go for the cheap thing first though.

I had the alternator stop charging - warning light on, on daughter's Ibiza S/C, after looking around, and checking prices, I discovered that now that Lucas alternator/starter fixing places are history, the only parts I could buy that were genuine Bosch were quite expensive, this car was only 5 years old and was being kept for a few more years, so I discovered that ECP sell genuine Bosch refurbished (by Bosch) alternators at a not too bad price - especially if you pick the one with a slightly larger pulley. My plan was to swop pulley over and in doing so save a bit of money strangely enough, I got lazy and live with the slightly larger pulley diameter - it still seems to keep the car happy in winter. I think the difference in diameter was just 1mm .

Edited 17 March, 201511 yr by rum4mo

i can take my car to the place i bought my battery and if its faulty they will replace for free so will get battery tested first then if thats fine buy a new regulator

is tha euro car parts? will check the website for prices thanks

is tha euro car parts? will check the website for prices thanks

Yes, remember you will need to hand back one of the old ones to keep the price down.

Edited 17 March, 201511 yr by rum4mo

Alternatively, if you are lucky enough to have a local alternator fixer - let them sort one of your ones, that would be cheaper and get it sorted quickly without you needing to change to "plan B".

looking at all options because i need the car for work. cant find any local companies that repair them. to buy just the regulator i have to wait to recieve the item or might just take my alternator off and surcharge it for a new one at a local parts stockist around £70 for new

i can take my car to the place i bought my battery and if its faulty they will replace for free so will get battery tested first then if thats fine buy a new regulator

This should be your first action, before you buy anything else.

will be going to get it tested tomorrow then go from there. thanks for all your help 

got the battery tested and it was fine. found a company tha rebuilds alternators but they couldnt do it till monday so just bought new alternator and replaced wires from plug to alternator and everything seems fine ,got battery light and 14.3v at idle.