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Search Auto Parts Search 2003 Mercury Grand Maquis - Voltage output drop Sign up here!   Email This Post Auto Repair Home>> Automotive Repair>> Automotive Wiring and Electrical Tom Laquidara New User Nov 18, 2006, 4:41 PM Post #1 of 5 (1280 views) 2003 Mercury Grand Maquis - Voltage output drop Sign In On two occassions about a month apart, my voltage light went on and the meter dropped to the typical battery output level. After turning off car and restarting, it came back up to normal voltage level. In between these two occassions I do notice a slight slowness in the voltage needle reaching the normal level. Could this be brushes, or regulator? Thanks. Tom Greenleaf Ultimate Carjunky / Moderator Nov 18, 2006, 8:06 PM Post #2 of 5 (1275 views) Re: 2003 Mercury Grand Maquis - Voltage output drop Sign In I'll bet it's brushes as the diodes would normally stay broken. If you feel ok with taking the alternator apart you can use mega fine sandpaper (croakus cloth) and shine up the surfaces but don't go nuts as these parts don't give you tons of extra for working with, T Tom Laquidara New User Nov 19, 2006, 7:41 AM Post #3 of 5 (1272 views) Re: 2003 Mercury Grand Maquis - Voltage output drop Sign In Thanks. I've replaced brushes many years back but with the built in regulator and all I'm not even sure where they are. Would they be just below the 3-wire connector? Is purchasing new brushes an option? Thanks again for your thoughts. steve01832 Veteran Nov 19, 2006, 8:07 AM Post #4 of 5 (1271 views) Re: 2003 Mercury Grand Maquis - Voltage output drop Sign In Nowadays there are electrical shops that do that. It is easier and cheaper to buy a remanufactured alternator. Steve Tom Greenleaf Ultimate Carjunky / Moderator Nov 19, 2006, 9:57 AM Post #5 of 5 (1266 views) Re: 2003 Mercury Grand Maquis - Voltage output drop Sign In Steve said it probabably is the most efficient way is to buy rebuilt. A good rebuilder will have checked out their parts before they send them out for sale. The places that rebuild them are mostly good. Even if you have the time it really is a toss up, T   Email This Post   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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