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driver



Member Since: 02 Aug 2009
Location: bude , cornwall
Posts: 206

United Kingdom 2007 Defender 90 Puma 2.4 HT Stornoway Grey
Glow plug warning light timing
The glow plug warning light seems to be taking a long time to go out, up to 30 seconds is this normal? or is this a sign the glow plug timer/relay is on its way out, its a 300tdi.

any advice appreciated
Post #1016650 28th Nov 2023 7:38pm
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Ihod



Member Since: 07 Nov 2015
Location: Berkshire
Posts: 165

United Kingdom 1998 Defender 90 300 Tdi ST Rioja Red
I’d say it’s a sticking relay or a short in the glow plug wiring or a plug causing the issue.

Start with the first as it’s easier to determine (and cheaper to replace).

Tbh I tend not to cycle the pre-heat unless there’s a frost or the van has been unused for some time (and haven't had an issue with that).

If you go start thro’ the heat position on the ignition does it come on and stay on?

Either way if it’s staying on it may cause issues with the loom or plugs in the end. Ian

MY1998 300Tdi 90 Hard Top (Now Soft Top)
MY2015 110 XS SW - Sold
MY2008 110 County USW - Sold
MY1962 Series IIa Truck Cab - Sold
MY1994 300Tdi 90 Hard Top - Sold
MY2001 TD5 90 Truck Cab - Sold


Last edited by Ihod on 30th Nov 2023 3:19pm. Edited 1 time in total
Post #1016681 29th Nov 2023 6:08am
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landy andy



Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 5720

2006 Defender 110 Td5 USW Zermatt Silver
30 seconds doesn’t sound like an excessively long time if it’s cold.
Post #1016684 29th Nov 2023 6:51am
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mini Anaconda



Member Since: 23 Aug 2016
Location: Thames Valley
Posts: 784

United Kingdom 
30 seconds sounds like a long time.
I don't have a timer on my 200tdi glow plugs but I hold the key for 5-10 seconds and it always starts at the touch of the key. BORG - Bucks & Oxon 4x4 Response Group
Post #1016686 29th Nov 2023 7:40am
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MarkBrown



Member Since: 03 Oct 2022
Location: Mid Wales
Posts: 466

Wales 1983 Defender 110 Other HT Auto Keswick Green
I spent two years pre-heating my 200 TDI, only to discover that the glow plugs weren't connected, not even a wire! I guess they are not essential!
Post #1016688 29th Nov 2023 7:48am
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driver



Member Since: 02 Aug 2009
Location: bude , cornwall
Posts: 206

United Kingdom 2007 Defender 90 Puma 2.4 HT Stornoway Grey
Resolved by fitting a new glow plug timer, everything back to normal now.
Post #1017775 8th Dec 2023 8:39am
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