Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Ever seen an alternator fail like this? No charge, no battery light. Metro problem of the month! SOLVED!

MetroMPG · 11-11-2019, 09:08 AM

Everything I've read says these are a "1-wire" alternators - they don't need control voltage to work. Just ground & positive cable to battery and sufficient RPM. That's why I've been testing with the control wire on & also disconnected.

Today's task: cleaning all connections & finding a shop that will test 100 alternators.

11-11-2019, 09:08 AM	#32 (permalink)
MetroMPG Batman Junior Join Date: Nov 2007 Location: 1000 Islands, Ontario, Canada Posts: 22,530 Blackfly - '98 Geo Metro Team Metro Last 3: 70.09 mpg (US) MPGiata - '90 Mazda Miata 90 day: 54.46 mpg (US) Even Fancier Metro - '14 Mitsubishi Mirage top spec 90 day: 70.75 mpg (US) Appliance car Mirage - '14 Mitsubishi Mirage ES (base) 90 day: 62.14 mpg (US) Thanks: 4,078 Thanked 6,978 Times in 3,613 Posts	Everything I've read says these are a "1-wire" alternators - they don't need control voltage to work. Just ground & positive cable to battery and sufficient RPM. That's why I've been testing with the control wire on & also disconnected. Today's task: cleaning all connections & finding a shop that will test 100 alternators. __________________ Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata Honda mods: Ecomodding my $800 Honda Fit 5-speed beater Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage. Ecodriving test: Manual vs. automatic transmission MPG showdown EcoModder has launched a forum for the efficient new Mitsubishi Mirage www.MetroMPG.com - fuel efficiency info for Geo Metro owners www.ForkenSwift.com - electric car conversion on a beer budget