Faulty alternator?

[GhostWKD]

Hi all,

Recently noticed that when coming to a stop (revs dropping & braking) that my headlights dim. They then brighten up if I give the car a rev.

Would I be right in thinking this is probably my alternator on the way out? going to try and get a voltmeter on it later but preparing myself now

Is an alternator tricky to change on the Nob? FAQ says it's from a 2.5 ford cougar, is that true for the 3.0 engines too or do they use an ST220 item or similar?

Thanks,
Alex

[Adrian W]

I may be wrong but I would be looking for a poor earth, maybe start with the battery to chassis strap.

[andygtt]

I had a brand new alternator fitted a couple of years ago when mine failed and it then started to do this... its quite a common thing on the noble and is something to do with the ford regulator being designed to run with a different type of loom with an ecu.

The solution was a simple minor change in the wiring at the alternator plug and this solved it 100% on mine and quite a few other cars so its a recognised fix.... can't quite remember exactly what it was.

ALternativelly you can just live with them dimming slightly which is what a lot of car/owners have done... Im guessing ford changed the regulator design at some stage to improve it on their cars, certainly my old alternator never did it.

[funkybmx1]

Have to cut the black wire from the plug. And loop it back on to the b terminal. Easy