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Ndamico



Member Since: 03 Apr 2019
Location: Canada
Posts: 52
Canada 2004 Defender 110 Td5 CSW Alpine White
Extra relay under hood
Sorry for the ignorance but i'm new to Td5. 04 110. Found this extra relay under the hood and don't know what it does. truck has no additional options other than AC which i believe was installed at the dealership. i can see the relay connects to what looks like a piece of factory wiring. does anyone have an idea what it does?



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Post #786314 11th Aug 2019 5:59pm
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roel



Member Since: 08 Aug 2009
Location: Lelystad
Posts: 2039
Netherlands 2003 Defender 90 Td5 PU Caledonian Blue
That does not look factory to me. Can you trace the cable as I think it is a boom slang loom. I gives more voltage to the lights. Roel

1984 90 2.5 na Diesel - RR V8 (1994-2001)
1997 Camel Trophy Discovery 300TDI (2001-2009)
2005 G4 Discovery III 4.4 V8 (2008-2018) It's gone but it still hurts.
2003 90 Td5 (2009-now)
Post #786316 11th Aug 2019 6:14pm
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Ndamico



Member Since: 03 Apr 2019
Location: Canada
Posts: 52
Canada 2004 Defender 110 Td5 CSW Alpine White
of the 4 wires:

1 black ground to engine
2 red connect to the alternator battery post
1 connects to the factory wiring loom under the intake manifold. you can see it in the picture. i guess the question is what terminal on the OEM harness is it connected to? i see no connection to the headlights. 04 110 TD5
Post #786319 11th Aug 2019 6:32pm
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Ndamico



Member Since: 03 Apr 2019
Location: Canada
Posts: 52
Canada 2004 Defender 110 Td5 CSW Alpine White
here is the wire in question. i've circled it in red



Click image to enlarge 04 110 TD5
Post #786321 11th Aug 2019 6:37pm
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shropshiredefender



Member Since: 05 Jun 2017
Location: Shropshire
Posts: 832
England 2011 Defender 110 Puma 2.4 USW Santorini Black
Disconnecting the earth wire from the relay will disable it. Try doing that and see what doesn't work Whistle
Post #786324 11th Aug 2019 6:46pm
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dorsetsmith



Member Since: 30 Oct 2011
Location: South West
Posts: 4554
here is the wire in question. wire colours Question
Post #786325 11th Aug 2019 6:46pm
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Ndamico



Member Since: 03 Apr 2019
Location: Canada
Posts: 52
Canada 2004 Defender 110 Td5 CSW Alpine White
the wire looks to be brown with a red stripe. could be 50/50 brown and red. im almost thinking is has to do with glow plugs as the other wires next to it coming from the loom go to the glow plugs 04 110 TD5
Post #786327 11th Aug 2019 6:51pm
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dorsetsmith



Member Since: 30 Oct 2011
Location: South West
Posts: 4554
wire from starter motor rely starter motor coil Brown - Red 3.0mm



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Post #786328 11th Aug 2019 7:07pm
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Ndamico



Member Since: 03 Apr 2019
Location: Canada
Posts: 52
Canada 2004 Defender 110 Td5 CSW Alpine White
so does that mean someone bypassed the starter relay? 04 110 TD5
Post #786331 11th Aug 2019 7:21pm
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dorsetsmith



Member Since: 30 Oct 2011
Location: South West
Posts: 4554


black wire go to one side coil Question how are the other wire connect to the relay Question
Post #786333 11th Aug 2019 7:38pm
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Ndamico



Member Since: 03 Apr 2019
Location: Canada
Posts: 52
Canada 2004 Defender 110 Td5 CSW Alpine White
So if I want to reconnect this to the original relay inside the truck, where would I connect it to?


dorsetsmith wrote:
wire from starter motor rely starter motor coil Brown - Red 3.0mm



Click image to enlarge
 04 110 TD5
Post #786407 11th Aug 2019 11:05pm
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Ndamico



Member Since: 03 Apr 2019
Location: Canada
Posts: 52
Canada 2004 Defender 110 Td5 CSW Alpine White
I disconnected the ground from the relay and the starter doesn't run so that's it. What do I do to put it back to stock? 04 110 TD5
Post #786411 12th Aug 2019 1:01am
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dorsetsmith



Member Since: 30 Oct 2011
Location: South West
Posts: 4554



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Last edited by dorsetsmith on 12th Aug 2019 8:16am. Edited 1 time in total
Post #786421 12th Aug 2019 7:59am
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Ndamico



Member Since: 03 Apr 2019
Location: Canada
Posts: 52
Canada 2004 Defender 110 Td5 CSW Alpine White
Hi,

I'm wondering where the wire in the engine compartment that is currently connected to the aftermarket relay is meant to go? 04 110 TD5
Post #786422 12th Aug 2019 8:03am
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dorsetsmith



Member Since: 30 Oct 2011
Location: South West
Posts: 4554
Link 5 60amp under drivers seat fuse box ( NW ) brown- white wire 4.0mm to Relay two centre fuse Box from Left side (30)

(NR) brown - Red wire 3.0 - 4.0mm from relay two centre box (87) to starter motor (C0179-1)

Click image to enlarge

(WR) white - Red wire from ignition switch to relay two centre box (86) coil


(BO) Black - orange wire from Alarm ECU pin 10 green plug C0057 to relay centre box (85) coil



Click image to enlarge
Post #786427 12th Aug 2019 9:04am
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