glow plug electrics help

Alternative power-plants and transplants (GTi, Porsche, Subaru, Audi, diesel etc). Discussion and Q&A last answered over 2 years ago.
You may also want to visit the Wiki(pedia) for a more structured index of T25 repair, maintenance, technical and ownership topics.

Moderators: Moderators, User administrators

User avatar
weldore
Posts: 5595
Joined: 17 Aug 2008, 22:36
80-90 Mem No: 5833
Location: North Notts

Re: glow plug electrics help

Post by weldore »

we tried...but we failed :( ...at least nothing got set on fire :lol:
the word 'pissing' is safe

Dave and gail.....1983 Pop Top 1.9n/a diesel (aka Ready Steady Eddie)

psychonaut
Posts: 883
Joined: 07 May 2009, 09:17
80-90 Mem No: 6751
Location: Cardiff
Contact:

Re: glow plug electrics help

Post by psychonaut »

True enough!! There's no seperate glow-plug control unit is there? The system simply relies on that sensor telling the relay that the plugs are hot enough, and cutting the current to the busbar and plugs?

As an aside, because the flange where that sensor is housed is pretty much at the top of the cooling system, can I assume that I can get it out without coolant pishing out all over my garage floor? Again? :roll: :lol:
"There are many paths to redemption.
Not all of them are peaceful...."

Click here for some Visionary 'Nauts.....

For more unchartered heights of disgrace just ring 07872 069462

User avatar
weldore
Posts: 5595
Joined: 17 Aug 2008, 22:36
80-90 Mem No: 5833
Location: North Notts

Re: glow plug electrics help

Post by weldore »

it dont work like that Greg..the sensor tells the glow plug relay how hot the engine is.if its cold it will put it on for say 7-10 seconds..if its warm itll be shorter.its nowt to do with measuring the temp of the glow plugs.

and yes..only a small amount of coolant will come out if you remove it..i think you pull a clip and it comes out on them
the word 'pissing' is safe

Dave and gail.....1983 Pop Top 1.9n/a diesel (aka Ready Steady Eddie)

psychonaut
Posts: 883
Joined: 07 May 2009, 09:17
80-90 Mem No: 6751
Location: Cardiff
Contact:

Re: glow plug electrics help

Post by psychonaut »

Thanks Wellie - that's what I meant in a roundabout way, I'm just none-too-clever with these English words, being from this side of the Taff and all that ;)

I'll pull the sensor I think, and see about replacing it. Tomorrow :mrgreen:
"There are many paths to redemption.
Not all of them are peaceful...."

Click here for some Visionary 'Nauts.....

For more unchartered heights of disgrace just ring 07872 069462

User avatar
ewenmaclean
Posts: 293
Joined: 16 Nov 2006, 19:32
80-90 Mem No: 7306
Location: Edinburgh

Re: glow plug electrics help

Post by ewenmaclean »

Hello,

apologies for jumping in on the thread, but I had a look at the picture of the connector on the coolant flange, and I think possibly the fact the brown wire is cut is your problem - the yellow/red wire should go to the temperature sender, both brown wires should be earthed, and the blue/white wire to the glow-plug relay. On the junior timer connector you have going to the coolant flange, you should be able to see that an earth is associated with each of the two temperature outputs - one for the glowplugs, and one for the temperature reading on the dash.

My guess is that the brown is connected somewhere to the yellow/red wire from the loom somehow, and that the fact the yellow/red you see is earthed means the resistor is reading fine, but with the connectors the wrong way round - it doesn't matter which way you wire up a resistor.

I'd look at earthing that brown wire if I were you and seeing how long the glow phase is then

Hope that helps a bit

Ewen

User avatar
weldore
Posts: 5595
Joined: 17 Aug 2008, 22:36
80-90 Mem No: 5833
Location: North Notts

Re: glow plug electrics help

Post by weldore »

you are bang on ewen...of course the sensor needs to be grounded because its in a plastic housing... so you have one input for the temp guage and one out to ground...then one input for the glow plugs and one out to ground...one for each resistor yes?
the word 'pissing' is safe

Dave and gail.....1983 Pop Top 1.9n/a diesel (aka Ready Steady Eddie)

User avatar
ewenmaclean
Posts: 293
Joined: 16 Nov 2006, 19:32
80-90 Mem No: 7306
Location: Edinburgh

Re: glow plug electrics help

Post by ewenmaclean »

Hi Weldore,

yeah - that's it. There are two resistors there and they both need a single ground, although they could technically share the same one. The 4-pin plug is common to most vws there - even more modern ones, since tdis have one feed to the temp gauge, and one to the ecu, which then control the glow plugs.

You're right - since it's not a metal housing it needs a separate earth. Unlike in the other picture, which you correctly identified as the low revs oil pressure switch, where earth is provided by the head itself.

Ewen

User avatar
weldore
Posts: 5595
Joined: 17 Aug 2008, 22:36
80-90 Mem No: 5833
Location: North Notts

Re: glow plug electrics help

Post by weldore »

ok Greg :lol:

to be right you need to ....

disconnect the red/yellow wire thats running to the earth on the head.

then pull apart the connection on that brown wire and take the connector off it and join both brown wires together and run them both to the earth that you took the red/yellow wire off

then get the red/yellow wire you took from the earth and connect it to the temp guage wire(the one you disconnected from the brown one)

then connect both blue and white wires together and bobs ya mums brother :ok

we have Ewen to thank for this..
the word 'pissing' is safe

Dave and gail.....1983 Pop Top 1.9n/a diesel (aka Ready Steady Eddie)

psychonaut
Posts: 883
Joined: 07 May 2009, 09:17
80-90 Mem No: 6751
Location: Cardiff
Contact:

Re: glow plug electrics help

Post by psychonaut »

Ewen / Wellie - many thanks, I owes you both beer for this. I woke up about half an hour and the first flippin' thing that came into my head was that glow-plug light!! I'm going a bit mental with it, I swear....

Anyway, work beckons soon, so i'll try this tomorrow when I haul my idle derrière out of bed. I'll let you know how I get on.

Thanks again fellas :ok
"There are many paths to redemption.
Not all of them are peaceful...."

Click here for some Visionary 'Nauts.....

For more unchartered heights of disgrace just ring 07872 069462

User avatar
weldore
Posts: 5595
Joined: 17 Aug 2008, 22:36
80-90 Mem No: 5833
Location: North Notts

Re: glow plug electrics help

Post by weldore »

im sure you will be triumphant..unlike the kite escapades this evening :roll:
the word 'pissing' is safe

Dave and gail.....1983 Pop Top 1.9n/a diesel (aka Ready Steady Eddie)

psychonaut
Posts: 883
Joined: 07 May 2009, 09:17
80-90 Mem No: 6751
Location: Cardiff
Contact:

Re: glow plug electrics help

Post by psychonaut »

lolol - I think we need the story of the kite dude :mrgreen:
"There are many paths to redemption.
Not all of them are peaceful...."

Click here for some Visionary 'Nauts.....

For more unchartered heights of disgrace just ring 07872 069462

User avatar
weldore
Posts: 5595
Joined: 17 Aug 2008, 22:36
80-90 Mem No: 5833
Location: North Notts

Re: glow plug electrics help

Post by weldore »

well...

it was a bit breezy before we went so all was good.went to the chippy on the way for some tea and it started raining :roll:
got there and guess what..no bloody wind whatsoeva..so we were basicly making our own wind by running with the thing :lol: ..this obviously got a bit tiresome so it ended up with me resorting to driving and the lad sat in the boot with the boot lid up ..driving along a field at 10mph..in and out of ruts ..with a bloody box kite bouncing off the floor :rofl
the word 'pissing' is safe

Dave and gail.....1983 Pop Top 1.9n/a diesel (aka Ready Steady Eddie)

psychonaut
Posts: 883
Joined: 07 May 2009, 09:17
80-90 Mem No: 6751
Location: Cardiff
Contact:

Re: glow plug electrics help

Post by psychonaut »

PMSL!! I would have paid good money to see that!!
"There are many paths to redemption.
Not all of them are peaceful...."

Click here for some Visionary 'Nauts.....

For more unchartered heights of disgrace just ring 07872 069462

User avatar
weldore
Posts: 5595
Joined: 17 Aug 2008, 22:36
80-90 Mem No: 5833
Location: North Notts

Re: glow plug electrics help

Post by weldore »

our lass has recorded it on her phone...for times when im trying to be clever :roll:
the word 'pissing' is safe

Dave and gail.....1983 Pop Top 1.9n/a diesel (aka Ready Steady Eddie)

psychonaut
Posts: 883
Joined: 07 May 2009, 09:17
80-90 Mem No: 6751
Location: Cardiff
Contact:

Re: glow plug electrics help

Post by psychonaut »

I think your lass needs to be posting it on here, or Facebook, or YouTube, or all three :ok :mrgreen:
"There are many paths to redemption.
Not all of them are peaceful...."

Click here for some Visionary 'Nauts.....

For more unchartered heights of disgrace just ring 07872 069462

Locked