Glow Plug Light Cos Of Wrong Bulb!

[sketchy]

Hi all.

My dad has a 2002 galaxy 1.9tdi. he recently had the aux heater problem with smoke belowing out but then this cleared up by its self. Then what looks like the glowplug light (yellow corkscrew) on the dash decided it was going to come on after the engine was started and stay on and the display said somthing like Engine Warning. He also had a problem with his brakelights on perminantly so he brought it round for me to look at. I have purchaced one of the vag com thing on ebay but it has not arrived yet to diagnose the dash light, but when i was sorting out the brake lights it turned out that my dad changed a brake light bulb and had put a single filament bulb instead of the twin filament. This sorted out the brake light problem but also the dash light. Would a wrong bulb bring up the this coil light and and engine warning? or is the fact it has now gone off just a coincidednce.

Thanks.

Joe.

[Guest MATT jr]

...it is well known on here that problems with brake lights (in your case wrong bulb) can, for some reason, turn on your engine glow plug light.

 

MJR

[tim-spam]

It is not a coincidence - you have fixed the problem, and the reason is as follows:

 

The diesel has no throttle cable and engine power demand is determined by a potentiometer on the accelerator pedal. There is a safety system in place, such that, in the very unlikely event of a potentiometer fault causing the engine to speed up uncontrollably, touching the brakes will bring it down to idling speed and so prevent a possible accident. This is done by the ECU receiving a signal from the brake light switch. If the ECU detects any fault in the brake light circuit, it reduces the engine power and the glowplug warning light is illuminated. On an automatic, you are also prevented from selecting a gear.

 

I hope this answers your question.

[mumof4]

Hi sketchy..welcome to the forum :lol:

 

The aux heater is supposed to billow smoke when it is working..it switches on when the temp outside is 10 degrees or lower.... :lol:

[NikpV]

The aux heater is supposed to billow smoke when it is working..it switches on when the temp outside is 10 degrees or lower.... :lol:

 

 

have you found yours yet maz ?? :lol: :lol:

 

I was told that there were two potentiometer tracks in the potentiometer on the pedal and that they have to both agree if its going to anything but idle - guess they can't be male & female tracks cos we wouldn't get anywhere then :16: :16:

 

btw welcome sketchy :16:

[sketchy]

Thanks for all your help. This is a great froum

[mumof4]

 

have you found yours yet maz ?? :lol: :lol:

 

 

i have indeed!!tooka while..found it by following the clouds of billowing smoke. :lol: :16: :16: :16:

[tim-spam]

If the heater booster billows out clouds of smoke, it's running too rich or not igniting properly - there should be very little visible smoke when it's working correctly (although there will usually be a little just after start-up). On a very cold day, you can see a little visible condensation, but apart from that, the exhaust should be almost invisible most of the time.