Hello all.


So recently my alternator was playing up so i got a new one from halford and a new drive belt and fitted them both, i used a voltimeter to check if it was working and at 2500rpm it was reating around 14v so i takethat must mean its working ????


Now tonight i was sat in the car with the engine running and the music just died then when i tryed to put my light on the engine died i left it a few mins and tryed to strat it again and it started up fine drove half way up the road and it died on me again. wont start up agan now


any ideas ............. ????????

 

Your not having much luck are you mate

 

why didn't you check at idle ???

but 14v is usually too hi 13.something max at idle

not sure what it should be at 2500rpm

 

No its really getting to me now lol. i took it on a 400 mile round trip 2 days ago and it went sweet as a nut now its playing up again.

 

have you had the battery checked? have you checked the wiring? is your battery light working?

 

Right so it turns out that the altornater i had in was a 55a and i replaced it will a 70a could that be the problem ??? ive ordered a new 55a one with the 3 prong plug is that all i need to plug in ?? because the new one i have ordered had a little terminal with a w on it but there are no other cables apart from the 2 reds and the blue that is connected to the 3 prong plug ?

 

No, 70A is not a problem. The W terminal is used with dieselcars for the revcounter. You only need to connect the plug. Is your batterylight on when you turn the key? And does it go out when the car is running?

14 volt is perfect, even 14,5 volt is still good.
These (prince of darkness) Lucas type alternators are very sensitive (rectifiers break quite often) , it could be it is already broken.

 

I have two red wires and one blue one now am i right in thinking the two reds go to the b+ and the blue gos to the unlabled one ????

 

spot on fella, the two reds join together on the b+ terminal and the blue wire goeas to the 'nothing' terminal.
i'd check the wired from alternator to the starter motor for corrossion too, they break down and cause charging issues.

 

Ok mate, do you think it could just be that i need a new battery aswell ??


and will this unit deoo work even tho its a 70a and the original was a 55a ???

 

Right so i put the alternator on today and tested the voltage on it. it was flickering between 13.95 and 14.15 on idol then after letting it idol for a few mins it started dropping to low 13s.

Could the battery be fooked or is the alternator still not working ?

 

And just to top things off just went out to the car to have a look at a few bits and bobs and it wont even start yay

 

This cold weather is really bad on cars , if the battery is low on water or charge it'll show so check the level in the battery if it's possible , if not then charge it up over nite and then get to a place who can check the battery .

A 70a or 55a altenator will make no difference at all but if it was me i'd keep the 70a on it

 

I hope its just the cold weather ive put the batt on charge so ill take a look it the morn makes me want to smash the thing up somtimes.


Oh and when i turn the key i dont get a batt light ??? i used to tho ..... anydeas

 

is the battery light on when the ignition is on, before you turn the key to start? if not check the blue wire connection near the starter motor, you might need to renew it, common problem

 

So its not ..... it used to be tho. what blue wires that ?

 

little blue wire sounds broken,they rot inside so look ok but are fucked
replace it

 

follow the blue wire from the altenator to the starter and you will find a male and female connector close to the starter, just renew that connection. if you battery light is not working the altenator wont charge

 

Oh ok mate where can i get it from ?? is it just the blue wire i will need ?

 

just cut the old connection off and solder or crimp the two wires together

 

So i folwed the blue wire from the alternator to the little screw terminal thing cut it off and replaced it with a crimp and still no batt light .....

 

It's at the starter end mate, there is a male and a female connection that's the bit you need to replace

 

Just take the wire of off the alternator and ground it. Your batterylight should light up. If not your bulb could be broken, something could still be wrong with your wiring or maybe a fuse....

 

sorry to bump an old post to the top i found this via search, i have similar prob no batt light, but when car running slightly illuminated light, i tried earthing the blue wire and nothing?

 

the bulb had blown on mine stopping it making a full circirt.