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Tank

Member Since: 25 Jul 2014
Location: Fife
Posts: 431

TD5 Lights not working

Sorry everyone, I know this is a common thread but he goes anyway.

I have a 2004 TD5 with a boomslang loom and TruckLite lights.Generally these work ok however I intermittently have a problem when they dont work. This tends to manifest itself with the pink dim dip relay buzzing for a bit but then they come back on and all is good for ages.

Anyway, I had the dash off to change the lights in the dials to LED from Classic Car LED Ltd classiccarleds.co.uk great service and great pieces of kit at a really good price. LED's work a treat and really pleased. Anyway, I digress. While putting the dash back in I have no lights! I have side lights and full beam with the stalk pulled back to flash but no dipped beam. The dim dipped relay sometimes buzzes but not all the time. When it does, and I push the fog light switch, the dim dip relay stops buzzing! I think I may have an earth issue? Is the big green block behind the dash an earth block. What else could be the problem?

Land Rover electric are worse than Italian electics

Cheers

14th Apr 2020 10:51am

landy andy

Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 5729

2006 Defender 110 Td5 USW Zermatt Silver

Bypass the pink dim dip relay would be the best option, or at least a test. The relay has two bigger terminals, those are the two that need to be joined. So even just a short length of wire, with two male spade connectors crimped onto the ends will do.

Obviously that is removing the relay, and using wire bypass into the terminal/relay block.

14th Apr 2020 11:41am

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17443

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

An alternative to bypassing the relay is to reach under the O/S front wing and simply unplug the connector from the dim-dip resistor. (This is the location on a 2.4 TDCi, but I think the TD5 is in the same place).

14th Apr 2020 11:59am

Tank

Member Since: 25 Jul 2014
Location: Fife
Posts: 431

Cheers Andy will try that.

14th Apr 2020 11:59am

landy andy

Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 5729

blackwolf wrote:
An alternative to bypassing the relay is to reach under the O/S front wing and simply unplug the connector from the dim-dip resistor. (This is the location on a 2.4 TDCi, but I think the TD5 is in the same place).

Yes. Same place on TD5. Sort of below the fm aerial.

14th Apr 2020 1:43pm

Tank

Member Since: 25 Jul 2014
Location: Fife
Posts: 431

Still not sure why the fog light button has anything to do with it though?

14th Apr 2020 2:06pm

LandRoverAnorak

Member Since: 17 Jul 2011
Location: Surrey
Posts: 11324

Because the operation of the fog light is linked to the headlights being on.

To be honest, I wonder if the buzzing dim/dip relay is a symptom of a failing light switch rather than the cause of the problem? It won't do any harm to disconnect it as described above but this bit from your first post: "I have side lights and full beam with the stalk pulled back to flash but no dipped beam", is classic melted switch contacts. 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

14th Apr 2020 3:04pm

Tank

Member Since: 25 Jul 2014
Location: Fife
Posts: 431

The switch was replaced when I added the Boomslang loom so wouldn't have thought it was the switch?

Thanks though

14th Apr 2020 3:15pm

dorsetsmith

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

Re: TD5 Lights not working

Tank wrote:
Sorry everyone, I know this is a common thread but he goes anyway.

I have a 2004 TD5 with a boomslang loom and TruckLite lights.Generally these work ok however I intermittently have a problem when they dont work. This tends to manifest itself with the pink dim dip relay buzzing for a bit but then they come back on and all is good for ages.

Anyway, I had the dash off to change the lights in the dials to LED from Classic Car LED Ltd classiccarleds.co.uk great service and great pieces of kit at a really good price. LED's work a treat and really pleased. Anyway, I digress. While putting the dash back in I have no lights! I have side lights and full beam with the stalk pulled back to flash but no dipped beam. The dim dipped relay sometimes buzzes but not all the time. When it does, and I push the fog light switch, the dim dip relay stops buzzing! I think I may have an earth issue? Is the big green block behind the dash an earth block. What else could be the problem?

Land Rover electric are worse than Italian electics

Cheers

Le Land Rover elettriche sono peggiori di quelle italiane se la insulti in questo modo non farà che peggiorare

14th Apr 2020 3:49pm

Tank

Member Since: 25 Jul 2014
Location: Fife
Posts: 431

Adora che le parli sporco

14th Apr 2020 3:59pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17443

Working side and flash but neither constant dip nor main headlights is usually symptomatic of the main light switch having failed, but the odd thing with the OP's problem is that he has LED lights and still has dim dip, since LEDs usually don't work with dim dip.

Personally, the first thing I would do is disable the dim dip, and then - assuming that the fault is still present which is likely - investigate the switches.

The fact that the switch is recent doesn't mean that it isn't faulty, and also there are two switches involved (the side/head on/off switch and the dip/main switch).

The noise from the relay suggests to me that it is getting a significantly reduced voltage which is insufficient to energise it reliably.

14th Apr 2020 4:48pm

Tank

Member Since: 25 Jul 2014
Location: Fife
Posts: 431

Thanks for all the advice.

So, after a lot of methodical checks, which is unusual for me!, I found the problem. Turned out to be the headlight relay next to the fuse box. The yellow one. Not sure if it wasnt seated correctly or corroded. Anyway, took it out and cleaned it up and the problem was solved.

Thanks again, thats what this forum is good for, excellent help and advice.

16th Apr 2020 12:15pm

4RF RDS

Member Since: 19 Jul 2015
Location: Ottawa
Posts: 940

2000 Defender 110 Td5 XS CSW Epsom Green

Its great that you posted your fix. That way everyone can learn

2010 Range Rover MkIII Autobiography Super Charged (Idris)
2003 Range Rover Mk III (Desmond FitzWilliam)
2000 Defender 110 CSW TD5 (CTX)
1992 Range Rover Classic (Lizzy)
1972 Series III 300 Tdi (Stanwood)
1967 MGB GT

Every normal man must be tempted at times to spit on his hands, hoist the black flag, and begin to slit throats.
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16th Apr 2020 5:51pm

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