glow plug wiring and relay location

for questions and answers about alternative power transplants on the T25, GTi, Porsche,Subaru etc, this is the place. You must register to post but anyone can read.

Moderators: User administrators, Moderators

Post Reply
User avatar
Andyvandy
Posts: 130
Joined: 11 Jun 2006, 20:50
80-90 Mem No: 2700
Location: Rhynie, Aberdeenshire

glow plug wiring and relay location

Post by Andyvandy »

Hi,

I have a 1990 1.9TD and the glow plugs don't appear to be operational - takes a very long time to start from cold.

The Haynes manual doesn't cover the diesel vans so I have no wiring diagram.

I need to know where the glow plug relay is located so I can fault find the cause

The glow plug indicator lamp never goes off until the engine actually starts - which seems in itself to indicate a fault.

Any help much appreciated.

Thanks

Andy
Andy with a 1990 Westy Callifornia.
Member No. 2700

Timburrows
Posts: 279
Joined: 05 Jun 2014, 12:49
80-90 Mem No: 14187
Location: Shipton Under Wychwood

Re: glow plug wiring and relay location

Post by Timburrows »

The relay is in the engine bay on the near side top of the bulkhead nearest to the front of the van in a black plastic box with a lot of wires going to it,there is a 50amp strip fuse sits below the relay probably blown but can corrode through with age.they blow sometimes if a heater plug fails.test with a suitable piece of wire VERY IMPORTANT REPLACE WITH THE CORRECT FUSE TO AVOID A FIRE :ok

User avatar
Andyvandy
Posts: 130
Joined: 11 Jun 2006, 20:50
80-90 Mem No: 2700
Location: Rhynie, Aberdeenshire

Re: glow plug wiring and relay location

Post by Andyvandy »

Tim,

Thanks for the info.
If the fuse has gone it will be replaced with the correct one!

Thanks


Andy
Andy with a 1990 Westy Callifornia.
Member No. 2700

colinthefox
Posts: 692
Joined: 20 Oct 2009, 18:42
80-90 Mem No: 16447
Location: Somerset
Contact:

Re: glow plug wiring and relay location

Post by colinthefox »

Terminal L White/red to indicator light
T Blue/white to temp sensor at rear (front of van) end of cylinder head.
50 Red/Black to starter trigger
85 Brown earth
87 Big red to plugs busbar
30 Big red from strip fuse
86 Black ignition
1.9D (AEF) pop-top. Aaaaahhhhh........that's better.
Image

User avatar
Andyvandy
Posts: 130
Joined: 11 Jun 2006, 20:50
80-90 Mem No: 2700
Location: Rhynie, Aberdeenshire

Re: glow plug wiring and relay location

Post by Andyvandy »

Thanks Colin.

Just about to check out the problem now.

Andy
Andy with a 1990 Westy Callifornia.
Member No. 2700

User avatar
Andyvandy
Posts: 130
Joined: 11 Jun 2006, 20:50
80-90 Mem No: 2700
Location: Rhynie, Aberdeenshire

Re: glow plug wiring and relay location

Post by Andyvandy »

Just done some checking and the fuse is fine and power is getting to the glow pugs.
I suspect the glow plugs are at fault.

The nuts on the glow plug connecting bridge are rusty and seized solid.
It looks as though the only way I am going to get them out will involve destroying the connecting bridge.

Anyone know where I can get a new bridge?

The old one looks rather ratty anyway!

Thanks

Andy
Andy with a 1990 Westy Callifornia.
Member No. 2700

Aberdeenbus
Posts: 183
Joined: 03 Jan 2006, 13:28
80-90 Mem No: 6846
Location: Aberdeen

Re: glow plug wiring and relay location

Post by Aberdeenbus »

Hi,

http://www.brickwerks.co.uk/index.php/g ... iesel.html" onclick="window.open(this.href);return false;

Cheers
Si

User avatar
Andyvandy
Posts: 130
Joined: 11 Jun 2006, 20:50
80-90 Mem No: 2700
Location: Rhynie, Aberdeenshire

Re: glow plug wiring and relay location

Post by Andyvandy »

Thanks Si,


It looks as though I will have to remove the injector pump to gain access to the two front glow plugs.
Please would someone confirm that is the case?
It seems an awful lot of work just to replace the glow plugs....

Thanks

Andy
Andy with a 1990 Westy Callifornia.
Member No. 2700

User avatar
clift_d
Posts: 2739
Joined: 04 Oct 2012, 23:51
80-90 Mem No: 11695
Location: Hackney innit

Re: glow plug wiring and relay location

Post by clift_d »

Apparently you don't need to although it's a right bar steward to do. The key is to use the bus bar to hold the awkward glow plugs while you fit them back in. That and a long reach magnet to pick up bits dropped, and hold nuts while you put them back in position.
1988 LHD T25 1.6TD Westfalia Club Joker Hightop syncro

Post Reply