Glow plug light flashes on97 tdi sharan

You may want to check you fuses. If your fuses are good, check you brake light switch.

glow plug light comming on when driving . starting ok. check your brake lights are working.

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

your glow plug relay is going out you need to replace it.

i dont think it will hurt it, you might just be dealing with a loose wire

There are a number of different causes of this problem. Check all glow plugs. Check glow plug relay. If both are ok....This may seem unusual...Check the brake light switch situated at brake pedal. A faulty brake light switch will cause the glow plug light to flash
Good luck with it
John

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
John

this means you most likely have a burnt out glow plug or glow plug timer control or both

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

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