- Posts
- 10,639
- Location
- Oxfordshire
check the exciter wire, but if it's all good. sounds like the alts exciter circuit is broke.
New alternator, 65 in place of 35?
- Thread starter nobber
- Start date
This site contains affiliate links for which LandyZone may be compensated if you make a purchase.
flat
Well-Known Member
- Posts
- 9,075
- Location
- Far away from you!!
That's normal something to do with exciting the field windings, mine does this with my old alternator and my new one,
Edit - I have had a variety of old cars with Lucas alternators and they all did it, all my wIting and volt readings etc check out fine
- Posts
- 10,639
- Location
- Oxfordshire
old ones i'd expect it with, but with a modern rebuild and it didn't do it a day or two ago?
sometimes the alts voltage reg need a min amount before they send current to self sustain the fields. you checking your battery voltage? what's it at before you start the engine and when it's idle but the light is still on?
flat
Well-Known Member
- Posts
- 9,075
- Location
- Far away from you!!
I can't remember been a bit since I checked it but it was fine then, only needs a blip then is fine. Maybe my battery is a bit duff then?
- Posts
- 10,639
- Location
- Oxfordshire
sorry, half of that post was to nobber
meh, i'd live with a blip.. some alt makes require it. esp the older ones, like you said
for nobber, since it's just been rebuilt, has a higher idle and didn't need a blip a couple days ago.. then i'd be a lil suspect.
zeaphod
Well-Known Member
- Posts
- 3,107
- Location
- Belfast, Norn Iron
Mine is the same at the mo - needs a quick blip to extinguish the light, then all ok. It is charging the battery too, as I've been running it all winter. May be worth charging the battery up and retesting. A duff battery can drag the voltage down a bit.
I might stick the battery on charge tonight and try it tomorrow, the old glow plugs are taking their toll on the battery, they are a bit reluctant to easy start the engine.
Bugger, the battery has died. But I think there is something else wrong there somewhere.
I switched the glows on , let them heat for the usual 6 seconds, turned the key and nothing. No lights , nothing.
So I checked the battery, 5.6 volts. Correct me if I am wrong , but with 5.6 volts I would at least expect a dim light on the dash?
I put it on charge and it went from charging to maintaining in a couple of seconds, took it off charge and it read 10.5 volts.
The only thing I can think of is the glow plug relay is stuck on and its buggered the battery.
I switched the glows on , let them heat for the usual 6 seconds, turned the key and nothing. No lights , nothing.
So I checked the battery, 5.6 volts. Correct me if I am wrong , but with 5.6 volts I would at least expect a dim light on the dash?
I put it on charge and it went from charging to maintaining in a couple of seconds, took it off charge and it read 10.5 volts.
The only thing I can think of is the glow plug relay is stuck on and its buggered the battery.
Was 5.6 volts with the ignition off? if it was then the battery has recovered slightly hence the small voltage. Try it with ignition on and you will find the voltage is probably zero which is why you don't see any lights. Either way your battery is toast by the sound of it.
Huddy84
Well-Known Member
- Posts
- 746
- Location
- East Anglia
Mine has a new battery and just reconditioned the A127 alt. and I still need to give it a blip on starting. Just a 'design feature' I presume.
Im not so sure, Its possible that the engine harness has had it, well I know its had it, its old and cruddy, or that the exciter wire isnt getting enough voltage, I just need to get out there and check it over, finding the time at the moment to do anything is the problem.
