Question about 2001 Volkswagen Jetta TDI

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Glow plug light flashes on97 tdi sharan

Hi i have just bought a 97 tdi sharan the glow plug light flashes once car started which brake switch would i need to check the blue or black one also on first start up struggles to start it coughs and splutters then starts with alot of smoke please can someone advise me

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On some diesel engines the glow plugs will cycle after the engine is started. it does sound like your glow plugs are not all working that would cause the hard start and excessive smoke when it does start.

Posted on Feb 08, 2009

  • Tara Watt
    Tara Watt May 02, 2014

    the glow plugs were last changed 13th Dec 2013

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the glow plug relay is a little black box normally located in the fues box, the relay regulates power to the glow plugs, if the relay is not functioning correctly the plugs will not heat enough or, you will have to allow a longer time to let them heat up, it acts like a switch as such, when you turn on your ignition it switches over to make a contact inside, which inturn starts the heating prosess of the glow plugs when they are at the correct tempreture or the onbored computer detects they are it then switches back , without it , say just using a fuse instead, your glowplugs will just get hotter and hotter till they melted, and no you dont have to change the glow plugs hope this helps, ime not good at explaining stuff in writing lol

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Glow plug light flashing on VW Sharan


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Good luck with it
John

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9 Answers

MY GLOW PLUG LIGHT IS FLASHING IN MY DASH BOARD VW 1997 PASSAT TDI.WHAT IS MY PROBLEM?


Despite what you may read from other comments....The glow plug light is simple a multi function warning light and IS among many othed things in fact used to warn of brake light and brake light switch failure. Therefore it can NOT be treated as glow plug problems only.
I have worked on V.W for many years and have encountered this problem many times. You should get the OBD codes read. This will reveal the exact problem...and there may be more than one
You can contact your V,W agents if you wish and check to see if I am correct.
Best of luck
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Glow plug indication light flashes while driving never goes away


Remarkably, this problem is often associated with a faulty brake light switch down at the pedal!
It happens on my '97 Sharan from time to time and a tap on the brake pedal with my left foot stopped the glow plug light flashing.

You may need to replace the switch; but I would suggest checking the connecting wires down there first - and get someone to tell you if your brake lights come on when you press the pedal.

Hope this helps you a bit. If it does, a "Fixya" rating would be much appreciated. If it doesn't
help you, I'd be grateful if you didn't bother with a rating at present - they can't be increased later if I do manage to solve your problem! Just come back and tell me what you found. Cheers, D

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1 Answer

Glowplug light on my golf tdi


Hi Andy,
Remarkably, this problem is often associated with a faulty brake light switch down at the pedal!
It happened to my '97 Sharan the other day whilst driving along, and the merest tap on the brake pedal with my left foot stopped the glow plug light flashing.

Posh folk sometimes replace the switch; I would suggest checking the connecting wires down there first :-)

Hope this helps you a bit. If it does, a "Fixya" rating would be much appreciated. If it doesn't
help you, I'd be grateful if you didn't bother with a rating at present - they can't be increased later if I do manage to solve your problem! Just come back and tell me what you found. Cheers, D

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