The Dispatch | Expert | Scudo Hub

Oldboy

Member

Registered: 2019-11-08

Posts: 30

glowplug relay pinout

Citroen Dispatch 2L HDI at times not starting promptly. I would like to check the glowplugs but they are situated at the back of the engine, access from underneath. not wishing to crawl under to make a simple electrical test. I need the pinouts for the glow plug relay. It has 8 pins....pin 4 12v+, pin 5 ground I believe pins 1,2,6,7 are to the glowplugs leaving 3,5 for control if someone could confirm this I could check the ohms reading of the glow plugs from the relay position

Wire colours at the relay
pin 1 blu, pin 2 pnk, pin 3 Y, pin 4 Bk, pin 5 Grn/Y pin 6 Grn, pin 7 R, pin 8 Wh

Many thanks in anticipation Michael

AlvyLad

Member

Registered: 2021-06-11

Posts: 481

Re: glowplug relay pinout

Not an answer you are looking for, but
"Hard starts" are usually starter or BPGA related
Glow plugs are both ambient ("outside") and engine temperature dependent, hence I had glow plugs tested by mechanic, who said my relay packed up, got relay replaced, got another mechanic to explain (above)...
(More on the topic) Them x8 wires will not power on with key turning as you wish in this temp.

Last edited by AlvyLad (2024-07-18 19:44:51)

Oldboy

Member

Registered: 2019-11-08

Posts: 30

Re: glowplug relay pinout

Thanks for the reply What does BPGA stand for?

Would it be possible to turn the relay on with a suitable scanner, could you point me in the right direction?

The van usually starts reliably in cold or hot weather but lately, it seems a bit reluctant, I just thought I would eliminate the glow plugs while the weather is good, once started it runs fine

Last edited by Oldboy (2024-07-18 21:15:41)

AlvyLad

Member

Registered: 2021-06-11

Posts: 481

Re: glowplug relay pinout

BPGA is battery (and charge) management system, that's operated via x1 relay, in accordance to ECU.

Starting poorly when hot...
Not sure what would be the best scanner to read everything thoroughly, peeps use Lexia 3 full chip and able to log in to old system (when it was free) DiagBox or else cough cough...
Cheapest option.

Whilst lot of garages have suitable scanners for error readings, for you to get glow plugs tested, you'd need mechanic to do that, as I couldn't even get to mine (Pug 5008), when they did a cambelt, they had one side apart, so wasn't too far to get to the back off it for them, yet, told me to get new relay...

Last edited by AlvyLad (2024-07-18 22:15:27)

kenbw2

Administrator

From: Preston

Registered: 2017-11-26

Posts: 1,612

Re: glowplug relay pinout

You could also check the relay by doing a voltage test on the pins. Might be a bit of trial and error, but if you can detect a 0V with the key out, and a 12V when the relay is meant to be engaged. It might prove that it *is* working. Or if none of them do it, then it proves that it's not working.

I know on our older ones, the major current feeds (as opposed to the signal wires) are quite chunky. Is that true on yours?

---

2000 Citroen Dispatch 1.9TD XUD9 Camper Conversion
1999 Citroen Dispatch 1.9D DW8 Disassembled Camper Conversion
1996 Peugeot 806 1.9TD XUD9 Spare vehicle
1998 Citroen Synergie 1.9TD XUD9 Snapped timing belt

Oldboy

Member

Registered: 2019-11-08

Posts: 30

Re: glowplug relay pinout

I know on our older ones, the major current feeds (as opposed to the signal wires) are quite chunky. Is that true on yours?

Thanks for that........ heavy gauge wire on pins 4 and 5, a smaller gauge on pins 1,2,6,7
pins 5,8 are of lighter gauge still. This is how I made my assumption about their designation. ie pins1,2,6,7 going to the glow plugs. Main power on 4 and 5 It would be quite difficult to back probe on the wires without causing damage, but a simple job to measure the resistance of the glow plugs with the relay removed or even check the current draw with a jumper wire, Im reluctant to do this for fear of damage if my assumptions are  wrong

AlvyLad

Member

Registered: 2021-06-11

Posts: 481

Re: glowplug relay pinout

The van usually starts reliably in cold or hot weather but lately, it seems a bit reluctant, I just thought I would eliminate the glow plugs while the weather is good, once started it runs fine

I'd change battery first, starter next, possibly alternator, as those "sluggish to start" up issues are commonly stem from
Just testing glow plugs is very painful (time consuming) opp, to replace them, without breaking is more like winning lottery... As it turns out (in accordance to very very knowledgeable mechanic) it's less than half of all "diagnosed already "- "bad glow plugs" replacements are indeed having anything to do with starting up.
We all know they are very cheap, but in our climate they don't even get used much, so it's pointless to be digging in to them, except to have them tested (which is already labour intensive job), that'll be very many times the cost of them.

Last edited by AlvyLad (2024-07-19 12:38:13)

OAT

Member

From: Borders/Dales

Registered: 2017-01-03

Posts: 1,013

Re: glowplug relay pinout

We all know they are very cheap, but in our climate they don't even get used much, so it's pointless to be digging in to them, except to have them tested (which is already labour intensive job), that'll be very many times the cost of them.

Assuming you are referring to glow plugs...

Do you mean you don't actively use them in summer?

AlvyLad

Member

Registered: 2021-06-11

Posts: 481

Re: glowplug relay pinout

We all know they are very cheap, but in our climate they don't even get used much, so it's pointless to be digging in to them, except to have them tested (which is already labour intensive job), that'll be very many times the cost of them.

Assuming you are referring to glow plugs...

Do you mean you don't actively use them in summer?

Spot on, not that I wouldn't use them deliberately, but "computer says no!"
And them modern engines have so much higher compression, glow plugs end up near absolete.

Oldboy

Member

Registered: 2019-11-08

Posts: 30

Re: glowplug relay pinout

AlvyLad wrote:
I'd change battery first, starter next, possibly alternator, as those "sluggish to start" up issues are commonly stem from

Thanks for the reply. I have to admit I am a bit paranoid about diesels not startng/glowplug issues, having to be rescued on-site with non-staters in the past Thinking about a past experiences a guy came to my aid with a Perkins Landrover conversion with twin batteries, hooked up to my van with huge jump leads......stated instantly! So I'm thinking first job change the battery!

AlvyLad

Member

Registered: 2021-06-11

Posts: 481

Re: glowplug relay pinout

I have to admit I am a bit paranoid about diesels not starting/glowplug issues,

exactly the same, why I HAD to dig in to my issues

having to be rescued on-site with non-staters in the past Thinking about a past experiences a guy came to my aid with a Perkins Landrover conversion with twin batteries, hooked up to my van with huge jump leads......stated instantly!

1- them more modern vehicles- everything about electrics and electronics, hardly ever is anything to do with actual components. It it works- it just does, if it doesn't- it's very much specialist subject to get to the bottom what's the actual issue
2- I ended buying some fairly ridiculous Li jump starter from Chyna. Doesn't work if batt is completely dead, "clamps" are way too short, but, after having had semi-flat batt, it understood to give a charge- I've never heard my starter spinning so fast. Concerns me little bit to start it up or not next time round.

So I'm thinking first job change the battery!

Sensible, would be even more sensible to check charge performance
1 all doors closed, van "in sleep mode"
2 ignition on for a minute
3 ignition off, a minute after/later (dormant state again)
4 Started, tick-over
5 higher revs charge voltage
6 High revs
should show enough of figures to get an idea if it's battery or charging system

Last edited by AlvyLad (2024-07-20 16:53:18)

AlvyLad

Member

Registered: 2021-06-11

Posts: 481

Re: glowplug relay pinout

Wire colours at the relay
pin 1 blu, pin 2 pnk, pin 3 Y, pin 4 Bk, pin 5 Grn/Y pin 6 Grn, pin 7 R, pin 8 Wh

If you are still in to it

Oldboy

Member

Registered: 2019-11-08

Posts: 30

Re: glowplug relay pinout

AlvyLad wrote: If you are still in to it

Yes that would give me confidence to test the glowplugs at the relay much as I figured out

Thanks for that, where did you find this?

Michael

AlvyLad

Member

Registered: 2021-06-11

Posts: 481

Re: glowplug relay pinout

AlvyLad wrote: If you are still in to it

Yes that would give me confidence to test the glowplugs at the relay much as I figured out

Thanks for that, where did you find this?

Michael

On Pug forum, there's quite a community, but most of the cars/vans in that PSA (Stelantis) are made very similar in majority of components etc