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OWS246



Member Since: 04 Apr 2024
Location: Stroud
Posts: 13

United Kingdom 2006 Defender 110 Td5 CSW Tonga Green
TD5 Engine light flashes on loses power.
Hi, Just wondering if anyone had any tips.
This morning I was pulling out of a junction while rolling and on accelerating I had the yellow engine warning light come on a complete drop in power and then suddenly it was fine for the rest of the hour journey. Any advice?
It is a 2006 TD5 with a turner engineering replacement td5. Defender TD5 110 CSW Tonga Green 2006
Defender TD5 110 CSW Caledonian Blue 1999
Post #1031653 15th Apr 2024 3:47pm
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freddie206



Member Since: 18 Oct 2015
Location: Skipton
Posts: 87

United Kingdom 2006 Defender 110 Td5 HT Belize Green
I have had a similar issue and traced it back to a faulty connection on the fuel pump relay. Other symptoms were no engine or glow plug lights with ignition on, engine cranks but never starts.
Post #1031661 15th Apr 2024 4:36pm
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OWS246



Member Since: 04 Apr 2024
Location: Stroud
Posts: 13

United Kingdom 2006 Defender 110 Td5 CSW Tonga Green
Hi Freddie,
That does sound similar i have had the same issue with the glow plug lights not coming on.
With repairing the connection do you have any tips? Defender TD5 110 CSW Tonga Green 2006
Defender TD5 110 CSW Caledonian Blue 1999
Post #1031662 15th Apr 2024 4:42pm
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freddie206



Member Since: 18 Oct 2015
Location: Skipton
Posts: 87

United Kingdom 2006 Defender 110 Td5 HT Belize Green
Nothing technical I'm afraid. When it doesn't start I give the relay a wiggle/push it back into the holder. That sorts the issue for a while. I should probably remove the relay and change/clean the terminals.

Next time you don't get the engine/glow plug lights when trying to start give the relay a wiggle. If it clicks and you get lights then I'd say that's your issue.
Post #1031801 16th Apr 2024 10:13pm
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MadTom



Member Since: 10 Sep 2013
Location: Olomouc
Posts: 578

Czech Republic 1999 Defender 130 Td5 HCPU Baltic Blue
MIL lamp, Glow lamp, main relay and glow plug relay are directly controlled from engine ECU. When you switch the ingnition on, both MIL and GLOW lamps should light at least for short time. If not, the there is a problem in wires, problem with nono powered ECU (like problem with wires for main relay) or problem in ECU itself.
Bad contacs of relays can be "solved" by cleaning them a carefull pressing with pliers, to make the female contacts more tight. If the contacs are already too soft from overheating, this will help only for sort time, and the only solution is to replace the contacs.
Also it is ossible to remove relay, remove the top cover and check internals, I have seen relays with burnt or totally mising contacs inside. "Drobek" = The Small One - Discovery 2, "Blufínek" = The Blue Thing - Defender 130, and for me at least Ford Mondeo Smile
Post #1031812 17th Apr 2024 5:16am
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OWS246



Member Since: 04 Apr 2024
Location: Stroud
Posts: 13

United Kingdom 2006 Defender 110 Td5 CSW Tonga Green
Ok Brilliant, this is really helpful will have a look. It definitely seems like a connection issue, loose or bad contact so I will start by checking the contacts make sure they are clean and tight fitting. Pretty sure the ECU is ok as don't have oil on the ECU plug as checked that so hoping that's all ok.

thank you very much for your help!! Very Happy Defender TD5 110 CSW Tonga Green 2006
Defender TD5 110 CSW Caledonian Blue 1999
Post #1031998 18th Apr 2024 12:09pm
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MadTom



Member Since: 10 Sep 2013
Location: Olomouc
Posts: 578

Czech Republic 1999 Defender 130 Td5 HCPU Baltic Blue
Oil in cables or ECU is not a problem, voltages there are low and oil is good insulator. Problem is often in weak pins in connectors, resulting in poor electrical contact and replacing wiring harnesses, because it is easy. A bit of oil in connector or better propre dielectric grease is good to prevent oxidation of contacts. "Drobek" = The Small One - Discovery 2, "Blufínek" = The Blue Thing - Defender 130, and for me at least Ford Mondeo Smile
Post #1032057 18th Apr 2024 7:25pm
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OWS246



Member Since: 04 Apr 2024
Location: Stroud
Posts: 13

United Kingdom 2006 Defender 110 Td5 CSW Tonga Green
Ah ok, I didn't realise that. thank you very much Tom. Defender TD5 110 CSW Tonga Green 2006
Defender TD5 110 CSW Caledonian Blue 1999
Post #1032626 24th Apr 2024 8:20am
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