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I replaced the corroded battery terminals, I replaced the corroded battery tie down assembly, and filled the battery with water. Took it down to the Autozone. They checked the battery and the alternator, everything is ok, the battery is good, and the alternator under load at 2000-2500 rpms was fine.
But the battery lights flashes when I accelerate from 4k to 6.5k.
Any help, voltage regulator?
I have 95k miles on original battery and alternator.
98 Contour LX V6 Mtx
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Indy, I think we must be driving the same cars or something!!! Same mods, and now the same problem!!!! My alternator went completely dead, so I pulled it and replaced the brushes, but not the regualtor since the shop didnt have one in stock i took my chances that it was only the brush that was my problem... anyways, now that I have new brushes, my light still comes on at about 4000-4500. Next up for me I think is replacing the regulator, then finally a new alternator!  Ill keep you informed of my progress/solution. Later.... -Nick
"My family hauler can kick your family hauler's @SS!" ~~~~1999 Contour SE Sport~~~~ -KKM True Rev -Custom cat back Flowmaster exhaust -All Cat's fixed. -SHO Shop Off-Road Y-pipe -Many other Mod's done...
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Alternator, Voltage Regulator, Contour, Mystique, Contour, Mystique $59.18 $46.16 from http://www.ford-outlet.com Let me know how it goes.
98 Contour LX V6 Mtx
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The voltage regulator is built into the alternator so it is not usually serviced seperately.
However, RPM related failure at exactly the same speed is nearly always from failure of the alternator rotor. You will need to replace the alternator, or stay under 4500 RPM (just joking).
Jim Johnson 98 SVT
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V6 Regulator & brush assy # F5RZ-10316-B... 
V6 MTX 'Don't p**s up my back then tell me it's raining!!!" 'Its only nuts & bolts!' 'If I build it,fix it,upgrade it or modify it...MAYBE they will come....! Haines Motor Sports Inc, Dealer for 'Quaife America' & 'Autotech Sport Tuning' SOLE USA Dealer for the American Axle 'AUSSIE BAR'... Get a Turbo for you Zetec from HMS Inc...by 'The Demon' ...www.DemonDynamics.co.uk ..don't talk about it DO IT !!!
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T-20 or T-25 bit should fit the 4 screws holding the regulator in place.
99 SE Sport..ATX SVT exhaust SVT zip tube and air cleaner assembly Tinted windows 17" Cougar Zn Wheels
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It probably didn't help that I competed in IASCA and while all those 1st place trophies were nice at the time, including a trophy at the World Finals, no I am going to have to pay for it.
Sometimes I would draw 80 amps continuous upto 120 amps peak draw. I guess the alternator need help.
Thanks for the part number.
98 Contour LX V6 Mtx
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I've got a good used alternator for sale if either of you guys is interested rather than buying the parts or a new (reman) alternator. Drop me a PM or email.
Thanks, Rick
The first Blown 3 Liter! "Drive it till the wheels fall off" -my personal motto!!!! 98.5 T-Red SVT #6180 Many Mods Buckshot77@aol.com Owner of 00 #1611 Silver Totalled on 10/7/01 SVT Parts for Sale
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Ok, I finally have the money to work on the electrical system. 102k miles. Symptoms: Red light in pep hole of original stock battery. Battery light flashes at 4k + rpms. Options: Voltage Regulator for $35 or alternator for $140. Regular battery Autozone, $50, or Dyna-batt for $150. 
98 T-Red Contour LX V6 Mtx 106k miles 9" K&N, Aussie Pipe, Dual Mode Damper, 19lb. injectors, SHM MAFterburner, Ford 9mm Wires, Mystery Mod, ShoShop Off-road Y pipe, Dynomax Resonator and Muffler, 2.5" custom cat-back.
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