D2 Dash Wiring - one for the electrics gurus?

[gavinwibrow]

I thought my dash light which lights up the mileage had blown, but it appears there is no power getting to the light. Anyone happen to know which wire I should be tracing back from the first clip connection? My mechanic is pretty good on mechanical stuff, but does not claim to be so hot on electrics.
I suppose I could try RAVE, but those pics don't do much for my tired old brain.
Cheers

[sierrafery]

When you say mileage do you mean the LCD odometer?... how did you get to the conclusion that there's no voltage there?, anyway there's no external wire to that particular bulb, the instrument pack has a main feed and the lights are managed through the internal PCB so if only that one doesnt have feed and all the others have you need other instrument pack or a skilled electronist to find the interruption in the PCB cos there's no internal scheme of it in RAVE, better replace the bulb first or if you did and it didnt work make sure the bulb is good even if it's new cos for the odometer there's a dedicated one to be 100% certain it's a feed issue before going further

[gavinwibrow]

Thanks Sierrafery, hoped I might get lucky and you'd respond. Yes talking about the LCD that shows the total and trip mileage/kilometreage under the speedo.

My mechanic says he tried 3 bulbs, none of which worked (including connecting 2 complete old dash units), but I agree there is just a chance. At least he is honest and says he's not the best auto elec around - better on rebuilding engines, transmissions etc, so looks like a job for a specialist.
At least I can still just read the LCD in daylight.
Thanks again, we mere mortals really appreciate the responses from the various gurus around.

[sierrafery]

Do you say he plugged in a known good instrument pack and the odometer still didnt light up on that?:confused: ... if it's so let me dig in the diagrams for that cos it might be some external issue... watch carefully, is that the only thing which doesnt work... the clock is illuminated?

[alien]

This one is a little left field...
Has there been a Nanocom or similar on it?
The LCD display is turned off when looking in the ECU.
It's possible things got turned off and the LCD hasn't had a chance to reset/turn on.

[sierrafery]

Unfortunately this particular odometer illumination thing is not covered at all in any document i've searched, i can only presume that the instrument pack reacts to some BCU digital input but that's on the serial data bus and can't be identified so IF the issue persists with an instrument pack which works on other car the only way to rule it out is to replace the BCU, or to find a skilled electronist to make a bodge in the pack as to give a direct ignition feed to that bulb but that would not make it dim when the lights are switched on

complicated thing anyway

[gavinwibrow]

Yep everything else works including warning lights and clock.

[gavinwibrow]

This one is a little left field...
Has there been a Nanocom or similar on it?
The LCD display is turned off when looking in the ECU.
It's possible things got turned off and the LCD hasn't had a chance to reset/turn on.
I keep my nanocom permanently in the car and regularly use it in instrument mode

[DazzaTD5]

Thanks Sierrafery, hoped I might get lucky and you'd respond. Yes talking about the LCD that shows the total and trip mileage/kilometreage under the speedo.

My mechanic says he tried 3 bulbs, none of which worked (including connecting 2 complete old dash units), but I agree there is just a chance. At least he is honest and says he's not the best auto elec around - better on rebuilding engines, transmissions etc, so looks like a job for a specialist.
At least I can still just read the LCD in daylight.
Thanks again, we mere mortals really appreciate the responses from the various gurus around.

Woooo Woooo Gav!! I've never admitted to "not being the best auto elect" .... I admit I have limited patience and some jobs I find it difficult to charge the customer (you and others) for the time I've spent on a particular job.

its a cost = value thing, I dont see the value in paying me for jobs such as "changing out the dash clock" on a D2, if you get what I mean.

I'm the best at everything I do.... or at least my obsessiveness eventually over comes any lacking in knowledge....

---
back on topic..
Yes I had tried numerous globes, and swapped the IP from one to another (as it was a very quick thing to try), so it is on my list of things is to track down that circuit that feeds the odometer light....

Regards
Daz

[DazzaTD5]

This one is a little left field...
Has there been a Nanocom or similar on it?
The LCD display is turned off when looking in the ECU.
It's possible things got turned off and the LCD hasn't had a chance to reset/turn on.

I never even had the thought that the Nanocom might be doing something to it, good comment.

Regards
Daz

[sierrafery]

Nanocom is useless in this particular issue, the instrument pack's illumination is not covered by diagnostics

[sierrafery]

Just to clarify one thing cos otherwise it's really odd, confirm that the other instrument pack's backlight bulbs are working cos you might not observe them if it's not dark... cos if they dont either everything becomes more simple

[gavinwibrow]

Woooo Woooo Gav!!
I've never admitted to "not being the best auto elect" .... I admit I have limited patience and some jobs I find it difficult to charge the customer (you and others) for the time I've spent on a particular job.

Its a cost = value thing, I don't see the value in paying me for jobs such as "changing out the dash clock" on a D2, if you get what I mean.

I'm the best at everything I do.... or at least my obsessiveness eventually over comes any lacking in knowledge....

... it is on my list of things is to track down that circuit that feeds the odometer light....

Regards
Daz

I see I've put my foot in it again. You put it so much better than I, and I have been guilty of recommending you any number of times:o

[Tins]

I see I've put my foot in it again. You put it so much better than I, and I have been guilty of recommending you any number of times:o

Lol. I've been told that the only time I open my mouth is to change feet....

[Bradtot]

Hi Gavin I will try to get hold of a second hand instrument pack and see what I can find out where it gets its power from then report back.
Just need to find one.
Brad:)

[gavinwibrow]

Thanks Brad, and also note Dazza's comment in the thread that he was "trying to find time to follow the same line" MY WORDS,

or if you prefer his words

"so it is on my list of things is to track down that circuit that feeds the odometer light...."

[Bradtot]

Yeah but I am an electronics tech and Dazza is a great mechanic....and he is really busy.
I met him last week and bought a some D 2 parts from him...:D:)
Brad:p

[gavinwibrow]

Brad, for what it's worth, Dazza has some packs ex wrecked D2s in the yard? Long way to go though!

[sierrafery]

In my stubbordness to help i insist ... please answer to my question...or do you igneore me on purpose?:confused:
Just to clarify one thing cos otherwise it's really odd, confirm that the other instrument pack's backlight bulbs are working cos you might not observe them if it's not dark... cos if they dont either everything becomes more simple

[gavinwibrow]

In my stubbordness to help i insist ... please answer to my question...or do you igneore me on purpose?:confused:
Apologies SF, I thought you would have picked it up in DazzaTD5's earlier post ie

"back on topic..
Yes I had tried numerous globes, and swapped the IP from one to another (as it was a very quick thing to try), so it is on my list of things is to track down that circuit that feeds the odometer light...."

I'm no mechanical genius, so rely on others for advice and action.

Very appreciative of the wide ranging info you supply on this forum.
Waiting to see what comes out of the woodwork.
Cheers Gavin

[sierrafery]

I re-quote myself again please sanswer to this cos it's crucial:

Just to clarify one thing cos otherwise it's really odd, confirm that the other instrument pack's backlight bulbs are working cos you might not observe them if it's not dark... cos if they dont either everything becomes more simple

[DazzaTD5]

I re-quote myself again please sanswer to this cos it's crucial:

Yes, I'm sure we did hear (read) you the first time... :) :)

All other lights in ANY IP cluster thats installed works.
The back light on the Odometer DOESNT work for ANY IP cluster thats installed.

Regards
Daz

[sierrafery]

In this case you should rule out the BCU then... no need for programming for the test cos at this stage you dont want to start the engine just plug in the known good one turn ignition to position II and watch the LCD