1. Home
  2. Automotive Technologies
  3. Alternator connector glowing red hot after jumping veh with other battery

Alternator connector glowing red hot after jumping veh with other battery

My 99 Explorer had been running fine. Tonight I left my lights on, killed t
he battery - which is about a week old from Walmart. Boosted it with anothe
r battery I have that happens to be good. Car fired up but the connection n
ut with the rubber boot at the top of the alternator started glowing red ho
t. Obviously can't run it like that.
Any ideas what's happened? Never encountered this before.
Thanks.
Reply to
brassplyer
Loading thread data ...
Hello, and if you're talking about the output terminal (not the field coil terminal), then perhaps one or more of the internal alternator diodes is/are shorted. Motor vehicle alternators are three-phase AC and supply that to a full-wave, six-diode rectifier bridge assembly. Those diodes can be internal or external to the alternator but most of the time they're internal. A shorted diode or two could allow for the flow of battery current to ground (car frame). Sincerely,
Reply to
J.B. Wood
wrote:
Your alternator is shorted to ground internally. Either because it got a brief reverse polarity spike or just because it failed from age. You may be able to get the diodes in the regulator replaced or you may have to swap out the whole thing. --scott
Reply to
Scott Dorsey
" So I can take out my fusible link then?
-- "
No, wiseguy. Alternators are the most likely underhood component to go bad in an automotive electrical system. That's all I was saying.
Back in college went through three new batteries in my '81 Buick. Replaced the alternator after that third one and never bought a battery for that car again.
Reply to
thekmanrocks

Site Timeline Threads

  • Over heating

  • I have a 2000 Chrysler cirrus with a 2.4l and I replaced the thermostat and it...
  • site's newest in

    Chrysler Cars

Related Threads

  • Glowing red exhaust

  • I just had my '90 Toyota 22RE truck head gasket, timing chain, gears,...

  • Alternator problems - glowing connections

  • I have previously mentioned that on my old late 80s car that thebattery light...

  • Is this a problem with battery, alternator, other?

  • I have a '98 ES300 and I purchased a battery for it about two monthsago....

  • Battery light occasionly glowing?

  • On my old late 80s car the battery light on the dashboard glowsoccasionally. The...

  • hot alternator

  • After replacing the radiator, I'm not seeing any more smoke in theengine...

  • alternator .. hot , real hot

  • Ok, I've got a situation with the alternator on my 92 jetta, either a)...

  • My wheel is glowing hot - help!

  • I have a 1998 Toyota Camry LE. It's no spring chicken, but it is newto me...

  • alternator hot, engine off

  • 2006 Ranger, 3.0LThe alternator was getting hot with the engine shut off...

  • Alternator too hot

  • The alternator on our 95' Corsica 2.2-L recently failed, resulting in adead...

  • Battery Terminal-Connector Corrosion

  • I have an '01 Sentra GXE with after market alarm. For about a year and...

  • Alternator getting hot

  • Got to work the morning and smelt a 'electrical' burning smell comming...

  • Alternator and Battery test with multimeter

  • Having taken the advice a few posts down to buy a multimeter which I will I was...

  • Battery light glowing without ignition on?

  • The battery light has suddenly started to glow even with the ignitionoff and key...

  • Red Cross Battery.

  • Yesterday, at the Wal Mart Gestapo store I bought a made in China Red Cross...

  • Brown/red alternator wire???

  • After reading the posts on the brown /red connection. If they werereversed,...

  • Battery-alternator problem.

  • It's been really cold here (~10 F) over night and my car has developeda...

  • Problem with AC after alternator replacement

  • Hi all,I had my alternator replaced on my 2000 GMC Safari Van at a...

  • 2000 270 CDI W210 Battery/alternator red warning Not starting ??????

  • HII added a new battery with no result. ???It is dead and the display says...

MotorsForum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.