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Elite Member
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Join Date: Nov 2006
Location: Pocono Mountains
Posts: 7,547
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Elite Member
Join Date: Nov 2006
Location: Pocono Mountains
Posts: 7,547
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bad alternator (brushes, internal regulator, rectifier set, short/open windings), loose belt, bad battery cables, bad alternator wiring/connections, loose/missing grounds.
A little systematic trouble shooting is required, but cleaning and tightening battery terminals (also clean battery top if it needs it) and the grounds at fender wall, alternator, and the one on engine by diagnostic plug are are good ideas anyway. See if you have charging voltage at the battery terminals of 14-15V. Verify state of charge of battery to see if it is going down--should be 12V-12.5+V with engine off. Also check alternator fusible link in engine junction box. That's how I'd start.
Don't ignore it. Battery will keep car running and starting for a short time (at night, less than 30 minutes) until it decides to crump at worst possible time: miles from home, at night, with wipers on due to rain or snow.
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'99 4Runner SR5 5spd 3.4L V6 4WD(U.S), original '99 Talls in front, OME 906s in back, Hella fogs, Trekmaster shocks in front, Billy in back, no running boards, FIAMM horns, Alpine sound, Michelin LTX M/S2's, owned since new.
'97 HiLux SW4 5spd 4WD(Japan model bought in Brazil assembled in Argentina, very close to a 3.0 4Runner/Surf)
'71 FordWillys Jeep CJ5 (with straight six Ford Maverick 3.0 liter engine--lives in the mountains north of Sao Paulo Brazil)
My Backyard Frame Swap
Last edited by TheDurk; 02-04-2011 at 10:30 PM.
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