 | Home > Td5 > Electrical issue & starting issue |
 
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| excossack Member Since: 22 Feb 2012 Location: North West Posts: 5747   
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Right. Update. 30 mins on charge and it started.
Engine running – volts at battery and at back of alternator 11.2v. Engine off., 11.6v. Tried restarting and drrr drrr drrr I have an old starter in the shed, that’s the next swap out or possibly a spare battery 1999 Defender TD5 110 Regards John M0VAZ Econet Station 48 no clock |
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3rd Sep 2015 6:33pm |
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| rallysteve Member Since: 10 Feb 2014 Location: Cumbria Posts: 2201 
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If your voltage is that low with the engine running I suggest its your alternator.
I had a similar problem with ours which turned out to be the alternator terminal loose. tightened it up and back to 14.4v at the battery. Not sure what twin battery set up you have but get the second battery disconnected. Have had worlds of trouble with a police transit with twin batteries where the aux battery drags the main battery down to less than 12v preventing the starting. Steve 02' 110 TD5 Double Cab Rebuild Thread 84' 90 3.9 V8 Caged Pickup Build Thread - Now For Sale |
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3rd Sep 2015 7:00pm |
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| Romadog Member Since: 07 Jul 2011 Location: Powys Posts: 1747 |
Check single energiser wire connector on starter. I had a starting issue only fo the AA man to lift bonnet, pull off wire, then put it back on, asked me to try again and hey presto it started. Just dirty connection, a common problem.
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3rd Sep 2015 7:20pm |
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| excossack Member Since: 22 Feb 2012 Location: North West Posts: 5747
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@rallysteve - Split charge is just a relay rated at 140amps. I removed the trigger wire and still the same. 2nd battery reading higher than main battery.
Tried swapping out to an older starter motor and even worse - so that starter is going in the bin The nut on the alternator appears tight but will check it tomorrow. The current starter motor when I removed it was covered in oil Good job I am off tomorrow ( I should be packing the car ready for recovery duties on a rally, looks like my mate will have to drive instead) 1999 Defender TD5 110 Regards John M0VAZ Econet Station 48 no clock |
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3rd Sep 2015 8:02pm |
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| gazman Member Since: 17 Aug 2015 Location: Liverpool Posts: 652 
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My money would be the alternator has died. It should be at least providing 13.5 v to charge the battery.
If the battery has been run really low due to not getting a charge it might be dead too. I'd get a new alternator and have the battery drop tested to make sure it's ok, if it is fully charge it and out the original starter motor back on. |
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3rd Sep 2015 8:36pm |
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| excossack Member Since: 22 Feb 2012 Location: North West Posts: 5747
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The original starter is going back on tomorrow. Got a spare battery on charge in shed just in case I need it.
My money is leaning towards an alternator as well - just seen the price of them! But it does have the Vac pump, Pas pump as well. With the blowers being slow, and the wipers, I do wonder if the fuel pump is not running at max pressure as well? Anyway, alternator first. If I get it started I will take it to a auto spark down the road and see if they can test it for me 1999 Defender TD5 110 Regards John M0VAZ Econet Station 48 no clock |
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3rd Sep 2015 8:54pm |
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| excossack Member Since: 22 Feb 2012 Location: North West Posts: 5747
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Looking around for alternators and spotted this line in an advert
"The vacuum pump is what usually fails and leaks oil into the Alternator causing the Alternator to fail" Is this engine oil ? 1999 Defender TD5 110 Regards John M0VAZ Econet Station 48 no clock |
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4th Sep 2015 8:20am |
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| trooper Member Since: 11 Mar 2014 Location: west sussex Posts: 102 
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Hi
Have you tried the main battery earth connection, to the side of the transfer box, this does cause a simular problem. |
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4th Sep 2015 8:37am |
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| excossack Member Since: 22 Feb 2012 Location: North West Posts: 5747
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Not yet but I will be this morning. Got a spare battery on charge as well. 1999 Defender TD5 110
Regards John M0VAZ Econet Station 48 no clock |
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4th Sep 2015 8:50am |
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| excossack Member Since: 22 Feb 2012 Location: North West Posts: 5747
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Earth's look OK to me. Not tried an earth direct to chassis/engine yet but will do next.
Swapped out the battery with a spare and went back to the original starter motor. 11.7v from the positive feed on the alternator to the alternator casing. Dropping to 11.4/11.5v with blowers & lights on. Failing that alternator off I think. Can I run the car with the alternator main positive feed off ? 1999 Defender TD5 110 Regards John M0VAZ Econet Station 48 no clock |
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4th Sep 2015 12:19pm |
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| K9F Member Since: 12 Nov 2009 Location: Bournemouth Posts: 9610 
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Alternator charging voltage never drops below 14.2 v on mine. You should be able to run without a serviceable alternator, make sure it's well isolated. Drain on your battery will be next to nothing once the vehicle has been started as long as you do not use any of your electrics, wipers, lights, blowers etc. if your journey involves a stop do not turn the engine off as it will probably not start. If you have a decent spare battery jump the vehicle initially to preserve whatever terminal voltage you may have in your fitted battery. Try it on your drive for 5-10 minutes and check the terminal battery voltage once started and after the duration to check rate of voltage drain if any before setting off. If you go through life with your head in the sand....all people will see is an ar5e!!
Treat every day as if it is your last....one day you will be right!! |
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4th Sep 2015 12:28pm |
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| excossack Member Since: 22 Feb 2012 Location: North West Posts: 5747
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The charging never dropped past 14.1v on mine until now.
Will running with the alternator connected prove anything useful? There still be battery drain during running for things like fuel pump etc. 1999 Defender TD5 110 Regards John M0VAZ Econet Station 48 no clock |
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4th Sep 2015 12:39pm |
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| K9F Member Since: 12 Nov 2009 Location: Bournemouth Posts: 9610
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Probably on reflection may as well keep it connected. A lower charging voltage is better than none at all even if it doesn't provide enough capacity to start the vehicle. Just don't turn it off underway to wherever you're headed. If you go through life with your head in the sand....all people will see is an ar5e!!
Treat every day as if it is your last....one day you will be right!! |
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4th Sep 2015 1:26pm |
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| excossack Member Since: 22 Feb 2012 Location: North West Posts: 5747
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Might be best.
Just used the Amp setting on the multimeter and between the positive terminal and the positive clamp with the meter set to DC Ma I got a reading of 8.00Ma (and a bit more at times). 8amp draw with all turned off? 1999 Defender TD5 110 Regards John M0VAZ Econet Station 48 no clock |
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4th Sep 2015 1:32pm |
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