Flickering lights i have a 2000 cougar v6 my lights started flickering and i replaced the alternator it was good then 3 months later my battery went and i changed it and the flickering is worse my kights flicker my dash flickers my blower motor for the heat goes up and down my rpms also help

NO ENGINE TOLD ! 2.0 OR 2.5LITER?????????
TH 8TH DIGIT OF YOUR VIN TELLS YOU WHICH ENGINE IS THERE, PLEASE TELL THAT FIRST.
The alternator is overcharging. what makes you think so?
a meter test.?
scan tool shows DTC that said that>?
OK JUST FLICKER,
lights flicker, what light, heads, or charge lamp error
or what? (i guess all)
putting in 3 wrong alternators is painful , there are 2 used, here. on 2 engines
one is pcm controls, other is not.
The 2 engines and matching ALTs:

DURATEC -VE 2.5LITER ONLY

ZETEC-VCT 2.0L ONLY

THEY ARE NOT THE SAME. ALT ! NOR ENGINES

DURA HAS 3 FUSES TO BLOW. BOTH ALTS USE THESE FUSES
F30-CJB. 7.5a, CENTERAL JUNCTION BOX.
and F2 =BJB, 15AMP BATTERY JUNC. BOX BJB
AND FB 175 AMP
THE REG IS INSIDE THE ALT HERE, NOT PCM

DID YOU REPLACE THE ALT WITH THE NEG LUG ATTACHED, IF YES, THE 175AMP FUSE IS BLOWN BOOM

ZETEC USES PCM REGULATION

AND SAME 3 FUSES TO FAIL, 1,2,3..

THE 175 FUSE MUST BE GOOD. TOO.

THE CORRECT GENERATOR FOR YOU ENGINE MUST BE USED
THE DURA and zetec alternator gens can NOT be mixed up here ever!

best way to buy any alt is by VIN # code or fail 1/2 the time or even 3times in row. or 175amp is blown
if buying over the counter (a new alt) tell them there 2 kinds used in 2000, tell them the vin 8th code.

take a test light and check your fuses , make sure both sides of the fuse is hot ! check power at alternator if no power gos in no power will come out.

I put a hot wire from the battery to the voltage sensing wire on the alternator...all the flickering and problems went away.

HAVE YOUR ALTERNATOR TSTED AT A PARTS STORE
YOU SHOULD GET BATTERY TESTED ALSO
WHEN VOLTAGE GOES DOWN IT WILL SHUT OFF COMPUTER
CAUSING CAR ENGINE TO SHUT DOWN SOMETIME JUST SITTING THE BATTERY COULD
RECUPERATE A BIT TO LET ENGINE START AGAIN BUT ALL POINTS TO ALTERNATOR

visit this site
http://cougarfix.yolasite.com

Voltage regulator is not doing its job, and it is allowing excessive voltage into the circuit. If you do not address this problem, some light bulbs and LEDs might start to burn out. Either replace the voltage regulator, or modify the circuit between alternator and regulator to match later model cougars, where this problem was solved.

Your alternator isn't putting 14 volts out to the battery. Check the stator wire on the alternator and the 3 wire plug make sure there is no gap on any of the alternator connectors and they are on VERY firm!

Hook up a multimeter inside your car and watch the battery voltage! if under 14volt you got an alternator problem!

main alternator cable (from alt. to battery).... i beleive there was a recall on some vehicles

body controll module [BCM]or power controll module[PCM],witch ever one feeds the instrument cluster,HAVE BOTH CHECKED FOR DEFAULT TROUBLE CODES, or check electrical harness all the way through for grounded wires that may be causing a short & not blowing fuses,I WOULD CHECK BOTH THE COMPUTERS [BCM] & [PCM] FIRST,MOST ARE FED BY [PCM] TO INSTRUMENT CLUSTER,which controlls the battery light to alternator.

my car started running like ****, gauzes on dash went to 0 and then would shoot back to where they should of been. parked car, shut it off and then it wouldnt start back up. jumped it and drove home- the whole time it bucked and spitted and wanted to stall. had the alternator replaced and then immediately the volt light started to flicker- i have left my lights on numerous times which contributed to my needing an alternator so i went and got a new battery. so far so good. it has only been a couple of weeks since all of this happened so it might be a little premature to think that it is solved. but for now it works!