 | Home > Technical > Is it my starter or bad earth ? NOW SORTED . |
 
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| AJC Member Since: 30 Nov 2015 Location: Lancashire Posts: 1360  
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I would say poor connection, but starters can fail due to swarf from the DMF if thats going too, dependant upon mileage, use etc
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17th Nov 2020 7:17am |
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| stew 46 Member Since: 26 Jan 2012 Location: Wadebridge ,cornwall . Posts: 561  
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2010 77,000 and very light use
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17th Nov 2020 7:20am |
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| Dave T Member Since: 07 Jun 2013 Location: Glasgow Posts: 490 
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Connect a jump lead from starter casing to chassis or battery neg and try it. 2015 RRS Autobiography SDV6
1994 Def 90 300tdi |
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17th Nov 2020 8:22am |
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| stew 46 Member Since: 26 Jan 2012 Location: Wadebridge ,cornwall . Posts: 561
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I’ll give it a go later Dave
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17th Nov 2020 8:25am |
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| Iktank Member Since: 08 Nov 2014 Location: Porthcawl Posts: 237  
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check the main earth from the battery that connects to the transfer box, that was the issue on my 2014 plate
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17th Nov 2020 5:23pm |
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| stew 46 Member Since: 26 Jan 2012 Location: Wadebridge ,cornwall . Posts: 561
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Had it up on my ramp earlier and it started 10 times in a row then on the 11th it was like the starter not getting enough power , so then put jump lead from starter to a good earth and the same started about ten times then like lack of enough power and starter not throwing enough
 , when the starter works its spot on so makes me feel it’s an earth problem!! But still a head scratcher 
Will try and get an hour on it tomorrow |
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17th Nov 2020 7:10pm |
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| Bian Considine Member Since: 25 Jul 2020 Location: Margate Posts: 53
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It could be a "dead" spot on the commutator &/or sticking carbon brushes.
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17th Nov 2020 10:58pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20320
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Two candidates likely to be the issue is as already suggested main Earth lead to T box.
Or loose battery clamps. Also worth checking the clamp assemblies and fuses that nothing is blown or especially loose including cable lugs and bolts. It is likely to be around the battery and it’s connections that is your issue as these were the areas disturbed and probably not the starter. Are you sure the battery is good and the voltage is correct and ready to go? If the battery is not the correct voltage in the first place and well charged that maybe an issue too. It should read at least 12.2v. ⭐️⭐️God Bless the USA 🇬🇧🇺🇸 ⭐️⭐️ Last edited by custom90 on 18th Nov 2020 1:14pm. Edited 1 time in total |
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17th Nov 2020 11:40pm |
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| dorsetsmith Member Since: 30 Oct 2011 Location: South West Posts: 4554 |
as ^^^
Only applicable to pre 07 land rovers I be having good look at that starter motor may you have same problem that later starter motor have i.e. coil main heavy switch contacts pitted you can get replacement solenoid but have and look at commutator and carbon brushes. before replacing it as commutator may not be serviceable Land Rover Defender Discovery 1 200 300Tdi Starter Motor Solenoid STC1245 STC1246 Box assembly-brush starter motor, STC1254 Spring-coil ________________________________________________________________________________________________ Its ford thing that your problem not serviceable scrap and start again Last edited by dorsetsmith on 18th Nov 2020 10:34am. Edited 11 times in total |
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17th Nov 2020 11:45pm |
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| stew 46 Member Since: 26 Jan 2012 Location: Wadebridge ,cornwall . Posts: 561
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I fitted a new battery Sunday and it’s reading 12.5 and 14.4 when running so I know that’s good
I’ll have good go at the earth today
Thanks for the info  |
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18th Nov 2020 6:49am |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6604 
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Stew change your Defender profile as it's got the 300 Tdi in it!
 1988 90 Td5 NAS soft top
2015 D90 XS SW |
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18th Nov 2020 8:45am |
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| stew 46 Member Since: 26 Jan 2012 Location: Wadebridge ,cornwall . Posts: 561
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Done
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18th Nov 2020 9:01am |
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| BogMonster Member Since: 05 Feb 2008 Location: Stanley Posts: 400  
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12.5 is pretty low if that is the settled voltage e.g. after sitting overnight with no load on it. A fully charged new battery I would expect to show more like 12.85v settled and the voltage charging is just what the alternator is putting out so all that means is the alternator is working fine. --- 2006 Defender 110 SW 300Tdi • 2011 Ford Ranger XLT crewcab • 2015 Defender 110 Station Wagon Utility TDCi |
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18th Nov 2020 9:59am |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20320
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I wonder if there is any issue with the plates in the battery?
In an ideal world, pity there isn’t a second battery to check just in case but that’s not really feasible. Have you tried hooking it up to read voltage during cranking to see the extent of voltage drop? There is usually a fairly significant voltage drop on Defenders anyway during cranking but could be a sign to keep an eye out for. Any lower than 8v during cranking I’d say maybe an issue. Have you tried the old battery again or is that not available now? ⭐️⭐️God Bless the USA 🇬🇧🇺🇸 ⭐️⭐️ |
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18th Nov 2020 1:19pm |
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