TDI alternator failure?? - Defender Source
Defender Source  

Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions


Reply
 
Thread Tools
  #1  
Old March 4th, 2015, 09:41 PM
RiftRover's Avatar
RiftRover
Status: Offline
Mike Barnett
110
Member
 
Join Date: Apr 2009
Location: Little Rock, Arkansas
Posts: 813
TDI alternator failure??

So I left work a little early today to try to beat the incoming snow/sleet event. Truck started up just fine, but about half way home I noticed the battery light was on. The battery has been a little soft with the cold weather and I've had to jump the truck a few times (glow plugs aren't hooked up), but the battery light always goes off shortly after starting. A few minutes later the windshield wipers started going slower and slower, then the fan stopped blowing air. By this time the roads were getting bad so I pressed on, but sure enough the truck died. Luckily I was able to coast to a turn lane so wasn't blocking traffic. Sounds like alternator but it's been running fine so I was surprised that it happened so quickly. Someone stopped to help and we jumped the truck with all accessories off (lights, heater fan, wipers) and I was able to drive home. As I was driving the battery light was slowly fading as if the battery was charging, so still not sure what the issue is. Any thoughts?
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old March 4th, 2015, 09:53 PM
rdavisinva's Avatar
rdavisinva
Status: Offline
Robert Davis
N/A
Member
 
Join Date: Oct 2004
Location: USA
Posts: 6,796
Break in the field wire.
__________________
RDavisinVA

Uncle "Richard" Douglas has a Land Rover with big wheels that never gets stuck... until he breaks something so it won't go. Uncle Douglas always breaks something. - Anna Crowther at the Conclave 2012 (AKA Carburetor Neck)

"What's with this death wobble, Uncle Douglas, I can't keep it in 1 lane?"
UD: "Just Power through it man!"
Reply With Quote
  #3  
Old March 4th, 2015, 09:55 PM
Red90's Avatar
Red90
Status: Offline
John B.
1991 Defender 90, 200TDI
Site Team
 
Join Date: Sep 2003
Location: Calgary
Posts: 9,239
Registry
You need to test things to see if it is the battery or the alternator.
__________________
Pissing people off on the "net" since 1983.

Land Rover. Turning owners into mechanics since 1948.
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old March 4th, 2015, 10:04 PM
RiftRover's Avatar
RiftRover
Status: Offline
Mike Barnett
110
Member
 
Join Date: Apr 2009
Location: Little Rock, Arkansas
Posts: 813
Quote:
Originally Posted by rdavisinva View Post
Break in the field wire.
Robert, forgive my ignorance but whats the field wire?
Reply With Quote
  #5  
Old March 4th, 2015, 10:15 PM
rdavisinva's Avatar
rdavisinva
Status: Offline
Robert Davis
N/A
Member
 
Join Date: Oct 2004
Location: USA
Posts: 6,796
Quote:
Originally Posted by RiftRover View Post
Robert, forgive my ignorance but whats the field wire?
Smallest wire on the alternator.
Usually brown with yellow or the other way around.
It runs from the F alternator terminal to the ignition warning light.
__________________
RDavisinVA

Uncle "Richard" Douglas has a Land Rover with big wheels that never gets stuck... until he breaks something so it won't go. Uncle Douglas always breaks something. - Anna Crowther at the Conclave 2012 (AKA Carburetor Neck)

"What's with this death wobble, Uncle Douglas, I can't keep it in 1 lane?"
UD: "Just Power through it man!"
Reply With Quote
  #6  
Old March 4th, 2015, 10:16 PM
Red90's Avatar
Red90
Status: Offline
John B.
1991 Defender 90, 200TDI
Site Team
 
Join Date: Sep 2003
Location: Calgary
Posts: 9,239
Registry
Quote:
Originally Posted by rdavisinva View Post
Smallest wire on the alternator. Usually brown with yellow or the other way around. It runs from the F alternator terminal to the ignition warning light.
If it was broken the dash light would not come on. The light grounds through that wire. Q
__________________
Pissing people off on the "net" since 1983.

Land Rover. Turning owners into mechanics since 1948.
Reply With Quote
  #7  
Old March 4th, 2015, 10:37 PM
RiftRover's Avatar
RiftRover
Status: Offline
Mike Barnett
110
Member
 
Join Date: Apr 2009
Location: Little Rock, Arkansas
Posts: 813
What doesn't make sense to me was that I was able to jump it and drive it again. If it was the alternator, would that be possible? What's the best way to test the alternator?
Reply With Quote
  #8  
Old March 4th, 2015, 10:41 PM
Red90's Avatar
Red90
Status: Offline
John B.
1991 Defender 90, 200TDI
Site Team
 
Join Date: Sep 2003
Location: Calgary
Posts: 9,239
Registry
The first thing to do is see the voltage with the engine off and running. If the battery is bad it can be hard to determine which is the problem.

Beyond that you need a battery load tester or an alternator tester.
__________________
Pissing people off on the "net" since 1983.

Land Rover. Turning owners into mechanics since 1948.
Reply With Quote
  #9  
Old March 4th, 2015, 10:43 PM
navydevildoc's Avatar
navydevildoc
Status: Offline
Neill Thornton
1984 D90 300 Tdi / 1965 Series IIA
Site Team
 
Join Date: Nov 2010
Location: San Diego, CA
Posts: 1,586
Registry
You didn't say what was on after the jump. All a TDI needs to keep running is the fuel solenoid to stay open, which is a very simple circuit with almost no power draw. Even with a crap alternator on the way out it may be enough to get you home.

Did you keep the lights or heater fan on? Those are your largest electrical draws on a Tdi.
__________________
"It doesn't swoop, curve, or look like it's going fast when it's parked. It never looks like it's going fast. It doesn't go fast." - Richard Hammond, BBC Top Gear


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote
  #10  
Old March 4th, 2015, 11:29 PM
RiftRover's Avatar
RiftRover
Status: Offline
Mike Barnett
110
Member
 
Join Date: Apr 2009
Location: Little Rock, Arkansas
Posts: 813
I said in the original post that I turned off all accessories (lights, wipers, fan) after we jumped it. I've got another battery so I can try that tomorrow. Just don't want to drain another one if it's the alternator.
Reply With Quote
  #11  
Old March 4th, 2015, 11:49 PM
Red90's Avatar
Red90
Status: Offline
John B.
1991 Defender 90, 200TDI
Site Team
 
Join Date: Sep 2003
Location: Calgary
Posts: 9,239
Registry
With a good known and charged battery you should see 12.5 volts or so engine off. Running the voltage should come up to 13.5 at least when reved up.

If the voltage comes up and the light still flickers you have a bad rectifier.

If it does not and you have the type with the brushed and regulator that are bolted to the back, pull it off and check that the brushes are not stuck.
__________________
Pissing people off on the "net" since 1983.

Land Rover. Turning owners into mechanics since 1948.
Reply With Quote
  #12  
Old March 4th, 2015, 11:59 PM
Ignotus
Status: Offline
gene
1960 109, w/200TDI
Member
 
Join Date: Sep 2012
Location: 3rd rock from the Sun
Posts: 401
Some of the chain auto stores will check your battery and alternator for free. Take em off and take em in.
__________________
Gene
1960 109
1960 88 Ignotus
Blog;
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote
  #13  
Old March 5th, 2015, 12:04 AM
Red90's Avatar
Red90
Status: Offline
John B.
1991 Defender 90, 200TDI
Site Team
 
Join Date: Sep 2003
Location: Calgary
Posts: 9,239
Registry
Quote:
Originally Posted by Ignotus View Post
Some of the chain auto stores will check your battery and alternator for free. Take em off and take em in.
Meh. Learn to test yourself and you are one more step to independence.
__________________
Pissing people off on the "net" since 1983.

Land Rover. Turning owners into mechanics since 1948.
Reply With Quote
  #14  
Old March 5th, 2015, 01:36 PM
RiftRover's Avatar
RiftRover
Status: Offline
Mike Barnett
110
Member
 
Join Date: Apr 2009
Location: Little Rock, Arkansas
Posts: 813
I've never been good with electrical stuff but it turns out this is a mechanical problem.. The belt is gone! Thanks for the input guys.
Attached Thumbnails
Click image for larger version

Name:	image-3651877037.jpg
Views:	62
Size:	383.2 KB
ID:	115315  
Reply With Quote
  #15  
Old March 5th, 2015, 01:48 PM
rdavisinva's Avatar
rdavisinva
Status: Offline
Robert Davis
N/A
Member
 
Join Date: Oct 2004
Location: USA
Posts: 6,796
Quote:
Originally Posted by RiftRover View Post
I've never been good with electrical stuff but it turns out this is a mechanical problem.. The belt is gone! Thanks for the input guys.
Nice!
__________________
RDavisinVA

Uncle "Richard" Douglas has a Land Rover with big wheels that never gets stuck... until he breaks something so it won't go. Uncle Douglas always breaks something. - Anna Crowther at the Conclave 2012 (AKA Carburetor Neck)

"What's with this death wobble, Uncle Douglas, I can't keep it in 1 lane?"
UD: "Just Power through it man!"
Reply With Quote
  #16  
Old March 5th, 2015, 01:51 PM
javelinadave
Status: Offline
-
-
Member
 
Join Date: Sep 2003
Location: -
Posts: 5,394
Quote:
Originally Posted by RiftRover View Post
I've never been good with electrical stuff but it turns out this is a mechanical problem.. The belt is gone! Thanks for the input guys.
I don't care who you are, that's just funny!
Next up, "My truck won't start. The gas gauge shows empty, the low fuel light is on, could it be the tire pressure?"
I'm glad you sorted out your issue.
Reply With Quote
  #17  
Old March 5th, 2015, 02:00 PM
RiftRover's Avatar
RiftRover
Status: Offline
Mike Barnett
110
Member
 
Join Date: Apr 2009
Location: Little Rock, Arkansas
Posts: 813
😊. I admit that I posted before I was able to look under the hood. I couldn't make it all the way to the house since I live on a steep hill and wasn't up for diagnosing the problem in the midst of the storm when I knew I could look at it today. I really am more competent than this makes me sound!
Reply With Quote
  #18  
Old March 5th, 2015, 02:28 PM
rdavisinva's Avatar
rdavisinva
Status: Offline
Robert Davis
N/A
Member
 
Join Date: Oct 2004
Location: USA
Posts: 6,796
Quote:
Originally Posted by RiftRover View Post
😊. I admit that I posted before I was able to look under the hood. I couldn't make it all the way to the house since I live on a steep hill and wasn't up for diagnosing the problem in the midst of the storm when I knew I could look at it today. I really am more competent than this makes me sound!
It's OK.
__________________
RDavisinVA

Uncle "Richard" Douglas has a Land Rover with big wheels that never gets stuck... until he breaks something so it won't go. Uncle Douglas always breaks something. - Anna Crowther at the Conclave 2012 (AKA Carburetor Neck)

"What's with this death wobble, Uncle Douglas, I can't keep it in 1 lane?"
UD: "Just Power through it man!"
Reply With Quote
  #19  
Old March 8th, 2015, 10:48 PM
RiftRover's Avatar
RiftRover
Status: Offline
Mike Barnett
110
Member
 
Join Date: Apr 2009
Location: Little Rock, Arkansas
Posts: 813
Put the new belt on and the PS pump started squealing, mist likely the cause of failure. It stopped after a minute but looks like I'll need a new one. Anyone have a disco 200 TDI PS pump laying around?
Reply With Quote
  #20  
Old March 8th, 2015, 11:45 PM
xplorUtah's Avatar
xplorUtah
Status: Online
Andrew P
1960 SII
Member
 
Join Date: Jul 2010
Location: Park City, UT
Posts: 1,132
Registry
Mike - I do. This is what I have. Check to be sure it is what you need.

NTC8287 - Pump 2500 cc - L/R - 4 Cylinder - Diesel - TDi - Turbo - 11L - 200 TD
New (installed but never ran) - Retail $152 - I would take $100 + shipping.

http://www.paddockspares.com/ntc8287...11l22454a.html
__________________
1960 Series II "Pliny"
1997 D90 SW #2496

"Fear profits man nothing"

1997 D90 SW #2139 Portofino Sold
1995 D90 ST #2445 Beluga Black Sold
1995 RRC SWB Beluga Black Sold
1986 110 200TDI "1 of 1" Sold
Reply With Quote
Reply

Lower Navigation
Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions

Tags
alternator, tdi

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Alternator failure in Main Rocky Defender Technical Discussions 8 February 12th, 2015 11:20 PM
Alternator Failure. ajh Defender Technical Discussions 2 February 9th, 2011 09:58 AM
Turn Signal Failure arbik Defender Technical Discussions 53 October 11th, 2010 10:51 PM
300 Tdi Serpentine belt failure roverboy Defender Technical Discussions 5 May 25th, 2006 02:53 PM
Tailight failure rustydefender Defender Technical Discussions 9 August 15th, 2005 01:23 PM


All times are GMT -5. The time now is 12:20 PM.


Copyright