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| LandRoverAnorak Member Since: 17 Jul 2011 Location: Surrey Posts: 11240   
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These sorts of problems are quite often due to poor earths so I'd start by cleaning and remaking those connections. Darren
110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak "You came in that thing? You're braver than I thought!" - Princess Leia |
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27th Dec 2020 6:44pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 19578
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Check the rear lighting ground on the RHS of the transfer box. It’s an m6 bolt or around that size and gets loose, it may not be the culprit but I’ve had it happen twice to me now.
I put a touch of loctite 222 very low strength loctite on it a drip on the threads then re-torqued. All good now. I had it after my clutch was replaced in 2012 as it wasn’t tightened up. Again in about 2016 as it worked loose despite being torqued correctly and again this year a few months ago. This time I added a touch of loctite for that very reason. When I tested the ground continuity the readings didn’t look adverse. The giveaway was the readings were different each side though which allowed me to track it down and the reason why is there is a couple of ring terminals on there and one would have better contact that the other in a sporadic way. When warm with expansion the lighting issue would go away. It may not be the issue but it’s a culprit that caused the problem I had that randomly developed. As LRA mentioned, it’s common for power to not be the issue but ground paths instead. Diesel$ Live$ Matter. ⛽️🛢️👨🔧🧰⚙️ RED, WHITE & BOOST! 🇬🇧 Last edited by custom90 on 27th Dec 2020 8:39pm. Edited 1 time in total |
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27th Dec 2020 7:47pm |
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| Liam Murphy Member Since: 29 Jul 2020 Location: South Wales Posts: 92 
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Thanks for this! I've just had my clutch replaced and it does get better once it heats up. I'll give it a check first thing in the morning.
Cheers! |
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27th Dec 2020 7:52pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 19578
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It’s on the RHS of the T box on the side but towards the rear part. The bolt has a flanged head to it also, the first time I looked at it. It was dirty and lose. In more recent times it simply worked loose. If it does happen to be that just nip it up a touch to see if it cures it. If it does whip it out. Clean everything and refit with the correct torque and a tiny bit of the 222 Loctite on the threads. Don’t use any other loctite as it’ll likely be too strong, this is a low break away thread locker for small fixings with a low strength.
https://www.ebay.co.uk/itm/Loctite-222-Scr...890.l49292 Good luck. Diesel$ Live$ Matter. ⛽️🛢️👨🔧🧰⚙️ RED, WHITE & BOOST! 🇬🇧 |
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27th Dec 2020 8:35pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 16879 
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I remembered that I have the diagram for the location of the earth point Custom90Steve is referring to in my gallery:
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27th Dec 2020 9:15pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 19578
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That’s the one Blackwolf. That’s excellent and will hopefully be useful to the OP if it’s the culprit.
Diesel$ Live$ Matter. ⛽️🛢️👨🔧🧰⚙️ RED, WHITE & BOOST! 🇬🇧 |
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27th Dec 2020 9:46pm |
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| Liam Murphy Member Since: 29 Jul 2020 Location: South Wales Posts: 92
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Thanks for this mate! The bolt was tight, I've cleaned the corrosion from it with sand paper and the dremel, still the same however. After I'd cleaned it: Click image to enlarge If I run a temporary earth directly from here to the bulb, it would tell me if it's further up the loom, right? I'm reaching at the moment! |
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28th Dec 2020 1:11pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 19578
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You can use any good ground source. But yes, if it works with a temporary ground you’ll know it’s somewhere on the ground path in the existing wiring. Diesel$ Live$ Matter. ⛽️🛢️👨🔧🧰⚙️ RED, WHITE & BOOST! 🇬🇧
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28th Dec 2020 6:24pm |
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| LandRoverAnorak Member Since: 17 Jul 2011 Location: Surrey Posts: 11240
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Do you have towing electrics? Weird rear light issues can sometimes result from corrosion within the socket, whcih might be worth a check. Darren
110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak "You came in that thing? You're braver than I thought!" - Princess Leia |
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28th Dec 2020 6:26pm |
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| Liam Murphy Member Since: 29 Jul 2020 Location: South Wales Posts: 92
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I'm going to get a pair of brand new bulb connectors to eliminate that first.
If it's not that it's in the loom, which is the best to have a problem |
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28th Dec 2020 6:28pm |
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| Liam Murphy Member Since: 29 Jul 2020 Location: South Wales Posts: 92
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Yeah! It's an ex utility so has a few towing sockets. Will give them a check... Cheers mate! |
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28th Dec 2020 6:31pm |
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| LandRoverAnorak Member Since: 17 Jul 2011 Location: Surrey Posts: 11240
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Ah, all bets are off then. Utilities are infamous for complex electrical systems! Darren
110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak "You came in that thing? You're braver than I thought!" - Princess Leia |
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28th Dec 2020 6:41pm |
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| Liam Murphy Member Since: 29 Jul 2020 Location: South Wales Posts: 92
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I've just changed both bulb holders and as expected no difference.
Therefore, it has to be a corroded wire in the loom. Perfect! I guess it's a full strip down to find the culprit then...  |
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30th Dec 2020 4:21pm |
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| Liam Murphy Member Since: 29 Jul 2020 Location: South Wales Posts: 92
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Is this where the tail light switch is located by any chance?
It's a diagram of the brake light switch, but wondering if that's a point where I can begin running a live down the side of the truck to test if its a cable in the loom. I'll run a ground from it's original position too. |
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30th Dec 2020 7:51pm |
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