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souster4

Member Since: 11 May 2014
Location: West midlands
Posts: 153

No glow plug relay

Hi guys

I've been wiring in an additional fusebox in my td5 defender. Positioned under the drivers seat. And while at it, I've been learning some of the land rover electrics.

I came across this un-used plug and looked into the wiring diagrams to find it was the glowplug relay plug.

Any ideas why this would have been removed or not fitted? I'm guessing I've had no power to the glow plugs for some time?

Last year plugs were removed to test them and they were fine.

Is it a special type of relay?

Thanks and merry Christmas all

Click image to enlarge

22nd Dec 2020 12:34pm

Martin
Site Admin

Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6664

2015 Defender 90 Puma 2.2 XS CSW Montalcino Red

70A relay needed

1988 90 Td5 NAS soft top

2015 D90 XS SW

22nd Dec 2020 12:59pm

hank

Member Since: 12 Sep 2016
Location: South Wales
Posts: 2325

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

Worth trying a relay in there. Think the part number is YWB500220

Not certain whether the same on a TD5 but for TDCi also check fuse 38.

Does make you wonder who removed it though and more importantly why? > 110 XS Double Cab

22nd Dec 2020 9:05pm

souster4

Member Since: 11 May 2014
Location: West midlands
Posts: 153

Thanks chaps will give it a go and see what happens.
I've still had the glow plug light ignite on the dash though?

24th Dec 2020 12:05pm

Martin
Site Admin

Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6664

Glow lamp control and glow relay control are separate ECU functions.

1988 90 Td5 NAS soft top

2015 D90 XS SW

24th Dec 2020 12:07pm

landy andy

Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 5909

2006 Defender 110 Td5 USW Zermatt Silver

I would test with a meter first, before just poking a relay in.

24th Dec 2020 2:32pm

Mo Murphy

Member Since: 01 Jun 2008
Location: Letchworth Garden City, Herts
Posts: 2336

1984 Defender 90 BMW M57 3.0 Diesel HT Auto Pennine Grey

How did you test them without a relay ?
Mo The Land Rover 90 - Many are called, few are chosen.

50 Shades of Pennine Grey

24th Dec 2020 3:53pm

landy andy

Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 5909

Check you’ve got 12V to relay carrier, check the resistance on the wire out to the blow plugs isn’t a short direct to earth. Check that the glows plugs aren’t already getting 12v from some other source or you've miss diagnosed the relay carrier.

You could disconnect the wire to the glow plugs and put a test bulb into the system instead.

24th Dec 2020 4:23pm

souster4

Member Since: 11 May 2014
Location: West midlands
Posts: 153

Thanks very much chaps. Hope you had a good Christmas.

I tested the glow plugs with jump leads on the bench, they are perfect.

I'll do some multimeter testing I think, instead of just chucking a relay in. Tis strange no relay I think

26th Dec 2020 10:43pm

hank

Member Since: 12 Sep 2016
Location: South Wales
Posts: 2325

I'll be interested to hear your findings > 110 XS Double Cab

6th Jan 2021 11:38am

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