Glowplug Light and Fuses

Technical questions and answers about the Mazda Bongo

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Dean

Glowplug Light and Fuses

Post by Dean » Mon Aug 03, 2009 5:44 pm

I have the rather annoying flashing glowplug situation, and have read the previous request on this forum that suggested checking No1 Fuse. I downloaded the fuse factsheet to make sure I had the right one and went to the fusebox.

No1 fuse is fine but I noticed that I have no fuse 18, which, according to the factsheet is for the glowplugs. Could this be normal? My Bongo's V reg (2000 I think).

I have previously found the ciggy lighter had been disconnected, which I reconnected but still the same.

Also the light doesn't start flashing until the engine reaches running temperature (guage at 11 o'clock)

Any further advice would be appreciated as I don't fancy a 100 mile drive back to 321 Away!
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Re: Glowplug Light and Fuses

Post by missfixit70 » Mon Aug 03, 2009 5:55 pm

Check the fuse diagrams again, under the bonnet you've got another bunch of fuses, on post 2001 diesels, the glowplug one is no 6 there (20a) I think you'd have starting problems if you didn't have any glowplug supply.
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Re: Glowplug Light and Fuses

Post by missfixit70 » Mon Aug 03, 2009 5:56 pm

Did you change the scavenge fan sensor? http://www.igmaynard.co.uk/bongo/forum/ ... ht#p323695
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Dean

Re: Glowplug Light and Fuses

Post by Dean » Mon Aug 03, 2009 8:42 pm

Yes, 321 Away sent me one, but the problem's still there
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Re: Glowplug Light and Fuses

Post by missfixit70 » Mon Aug 03, 2009 8:48 pm

There's a Diagnostics factsheet in the club members area on interrogating the ECU to see what else it could be.
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Dean

Re: Glowplug Light and Fuses

Post by Dean » Tue Aug 04, 2009 4:29 pm

Mine is a 2000 model, so according to the factsheet I should have fuse 18 inside the cab. The slot is marked 10A.
Would I notice the lack of glowplugs in this warm weather?
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Re: Glowplug Light and Fuses

Post by Doone » Tue Aug 04, 2009 4:33 pm

Warm weather! We have fog and rain. If we start our engine before the glowplug light has gone out (warmed the glowplugs) then it always sounds lumpy and takes a few seconds to run smoothly. This is definitely worse when the weather is very cold, but is still there to a lesser degree on the hot days. I would expect similar results if the glowplugs were not working.
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Re: Glowplug Light and Fuses

Post by missfixit70 » Tue Aug 04, 2009 7:35 pm

Try putting the fuse in no 18 & see if it makes any difference :wink: Just because the diagrams say it's for 2001, doesn't necessarily apply - bongos have a habit of throwing curves on what should & shouldn't be where, worth taking 2 minutes to have a look surely? You asked a question, I provided a possible answer :wink:
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kelv

Re: Glowplug Light and Fuses

Post by kelv » Tue Aug 04, 2009 8:59 pm

missfixit70 wrote:Did you change the scavenge fan sensor? http://www.igmaynard.co.uk/bongo/forum/ ... ht#p323695
I thought the sensor under the handbrake tunnel was the scavange fan sensor ?
That one in the pic looks in a different place.
I can make my glowplug light flash when the engine is warm by disconnecting the plug that goes to the ( scavange fan ?) sensor that is on top of the handbrake tunnel.
Maybe it's that connection on yours that is somehow not connected properly, which would give the same result as I get when disconnecting that sensor on mine ,
ie a flashing glow plug light.
But I don't profess to be an expert, so best of luck anyway :D
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Re: Glowplug Light and Fuses

Post by missfixit70 » Tue Aug 04, 2009 9:09 pm

kelv wrote:
missfixit70 wrote:Did you change the scavenge fan sensor? http://www.igmaynard.co.uk/bongo/forum/ ... ht#p323695
I thought the sensor under the handbrake tunnel was the scavange fan sensor ?
That one in the pic looks in a different place.
I can make my glowplug light flash when the engine is warm by disconnecting the plug that goes to the ( scavange fan ?) sensor that is on top of the handbrake tunnel.
Maybe it's that connection on yours that is somehow not connected properly, which would give the same result as I get when disconnecting that sensor on mine ,
ie a flashing glow plug light.
But I don't profess to be an expert, so best of luck anyway :D
Did you read the whole post I linked to Kelv & not just look at the pictures? :wink: Could be a connection issue as you say though.
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Re: Glowplug Light and Fuses

Post by kelv » Tue Aug 04, 2009 9:23 pm

The post linked to a picture of a radiator fan sensor :?
You know I am only capable of looking at the pictures, I was surprised that you thought I may be able to read as well :wink:

But yes, even with the words, the post didn't explain clearly where the scavenger fan sensor was or what it looked like.
There was some unanswered debate in there as far as I could see.
That's why the confusion, the scavenger fan sensor is the one that causes the the glowplug light to flash .
If the one under the handbrake tunnel is the scavenger fan sensor......
Now, the rad fan sensor may cause it as well, but I don't know about that.

Another point worth noting is that my scavenger fan is completely silent by comparison to the rad fan, which kicks in first.
So folks who have "heard" the scavenger fan swicth on may have been hearing the rad fan.
The only way I could determine that mine had come on was by looking at it, because it couldn't be heard.
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Re: Glowplug Light and Fuses

Post by missfixit70 » Tue Aug 04, 2009 9:47 pm

This was at the end of the thread I linked to - pretty conclusive answer IMO
dandywarhol wrote:The one pictured is for the radiator fans and also sends a signal to the ECU. This also controls the autogearbox changeup until the coolant is warm enough to allow the lockup to come in.
The scavenger fan control is next to the handbrake but is also linked to the ECU.
Let's not get this thread off track arguing over semantics AGAIN Kelv :wink:
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Re: Glowplug Light and Fuses

Post by kelv » Tue Aug 04, 2009 9:57 pm

missfixit70 wrote:This was at the end of the thread I linked to - pretty conclusive answer IMO
dandywarhol wrote:The one pictured is for the radiator fans and also sends a signal to the ECU. This also controls the autogearbox changeup until the coolant is warm enough to allow the lockup to come in.
The scavenger fan control is next to the handbrake but is also linked to the ECU.
Let's not get this thread off track arguing over semantics AGAIN Kelv :wink:
Hang on a minute, before you start being feisty and chucking accusations about romantics :roll:
I am genuinley confused as to which sensor does what, other folks may be as well.
It's not semantics, its on topic communication.
I will put it another way for you:

Dandys post that you quote is probably quite right, ,,,,,,,,,,,,,,,,,,,,, he usually is, as are you
BUT

Which sensor do you "bridge" to get the fan on for testing ?
The one on the handbrake tunnel, or the one under the seat ?
Do both the sensors do essentially the same job
What does the scavenger fan sensor look like ? Is it the same as the rad sensor ?
Is the one at the top of the handbrake tunnel actually the scavenger fan sensor ?
If it is, as it seems it maybe is , why does it make the glow plug light flash anyway ?
Any pics of the scavenger sensor location to clear any confusion ?

Ta.
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Re: Glowplug Light and Fuses

Post by missfixit70 » Tue Aug 04, 2009 10:01 pm

Start a different thread to answer those questions (or do a search - the answers are out there if you are that interested), refer to the original query & my comments about keeping it on track please.
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Re: Glowplug Light and Fuses

Post by jaylee » Tue Aug 04, 2009 10:05 pm

There's a white two pin connector under the steering cowl housing below the wiper stalk that when disconnected flashes the glow plug light & she's buying a stairway to heaven... :-({|=
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