Tusc

I know nothing of calibrating the speedometer readout. That sounds like something better left to a GM certified corvette technician.

If you retro-fitted the HUD to your pre-99 cluster, I would suggest going back and verifying:
1 - that the soldering is clean and there are no unintended shorts/grounds between them.
2 - that all wires are correct to the diagram
3 - that all wiring pins between Cluster and Hud are straight and effective connections (i.e. - no bent pin innards of the pins)

digikorrie

Thanks,

My wires are original GM Corvette because i used them from my complete usa speedo cluster
Soldering of the hud connector on the motherboard ( my eu board ) is done properly.

But i think i figured out what is the problem if i use my eu 300 kmph speedo gauge together withe the usa 200 mph motherboard.

I think it is the speedpulse sensor because the usa speed sensor it sends 4000 cylus each mile to the pcm so if it sends 40.000 cylus on the mile the speedo needle shows 10 mph on the 200 mph speedo gauge
The speed sensor cycle is stored en controled by the pcm.

But i use my 300 kmph gauge and have a euro pcm and i do not know how much cyle is uses
This is ofcourse also stored in the pcm
And i heard i can change te value of this using thec2 or VCM suite

Regards
Korrie

digikorrie

Hello again,

Today i tried to solve the problems again.
This is what i did today
I instald my complete euro cluster and pluged the hud in.

What happend is this: when i turn on to ignition the hud shows everyting it must this is the regular check.
After the regular check is shows for about 3 seconds the speed ofcourse this displayed 0 then it shows for about 3 seconds rpm line and oil line and then it goes back to speed for 3 seconds and then back to rpm and oil line this is going on for abaout 5 times and then at last it only shows speed

Who knows the solution so it shows other gauges also whwn i use the page switch for the hud

Of course i checkd al the wires and connections

Regards
Korrie

Tusc

An interesting issue. I wonder if a Vette Tech (Euro) would have an answer for you about the pulse cycle.

I also wish there were a proper compendium of what you can achieve with a Tech2. I bought mine to eliminate the F45 suspension programming and to be able to cycle the ABS / brake fluid. I know (or suspect) there are many other options, but there is no list of them and no directions explaining what to click to achieve a result.

ianmcgee67179

I may have just missed it in the thread, but I wanted to ask if you didn't have the 8 pin connection at the top of the cluster (aka not HUD ready) did you have to do anything for the 11 pin connection for the HUD switch or was the 11 pin connection already set up? I have a 99 and I am assuming I will have to do the same thing as you gentlemen have. Also this may be a dumb question but is the 8 pin connection the main connection that goes to the HUD projector? Great write up by the way, and good pictures.

Tusc

For me, I made the 11 pin piece from scratch. However, it can be bought as a used part from a junker and maybe it can even be ordered.

The 8 pin on the back of the cluster is the main data feed from the gauges to the projector. Extra points if you find a way to do it as a 90 degree install. Lol. Mine was at a softer angle, but worked fine.

ianmcgee67179

oh ok! So the 11 pin connection was already on the back of you cluster, you didn't have to solder that one as well did you? You just made the "wiring harness" for it, after getting the 11pin female ends from radio shack or somewhere?

cool challenge excepted, I'll have to try and make it 90 degrees! Haha

Tusc

Correct. The location for the hud bezel to plug into the cluster was already there. I only made the wiring harness.
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MrGary2011

Anybody know where the odometer module is? I want to take it out of my non HUD cluster and install it in my way nicer Z06 HUD cluster.

Tusc

You know, I found a thread which was recent where someone identified the specific chip with desolder and then resolder to the board to swap odometer between clusters. It's on here somewhere.

Search for: gauge cluster u13 atmel

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J. Chris Davis

I know this is a year and a half old thread, but I have a 98 and did the HUD upgrade. My gauge cluster has the solder points for the connector to the HUD projector. The problem I have is that even though the dimmer slider, up/down buttons work along with the MPH showing on the display that the page button will not do anything. I have tried two switches and talked to another member here with the same year and issue and found out I do in fact need the 99 on up gauge cluster. I will have to find someone local to adjust my mileage to match my car and then I will just be using the circuit board out of the new cluster and putting it in mine.

GCG

You may want to contact forum member K-Spaz. He did the same to his 98 and reported complete success in Post 2 of this Thread.

GCG

Take a look at this Post for another idea.

J. Chris Davis

K-Spaz is who I was in contact with and said he had the same problem as me and ended up getting a 99+ HUD gauge cluster. I will have to bookmark that link and think about maybe doing that. Thank you for posting it.

J. Chris Davis

Got the 99 on up gauge cluster today and that fixed the problem of it not paging through the viewable options. So it looks like the 98 gauges are not completely set up to work.

K-Spaz

Oh that's cool. I wish I had known that back when I did mine. Not that my mileage was off by that far it was about 1,500 miles but I'm **** like that. LOL
Yeah I'm told that somewhere during 98 they updated the Clusters and from that point forward they would work with the HUD. Obviously you and I both had earlier ones with the unfinished firmware for driving that display. I'm glad Brian got you hooked up with a new cluster that's got it all working. You're going to love the HUD. I can't believe how many people say they don't use it or don't like it. For me it was an absolute must. I really wish my 427 had the same HUD as my C5 had. The C6 HUD sucks by comparison.

J. Chris Davis

Mine was one of the last built in 98. June of 98. Thanks for the direct to Brian. He was very helpful and got me a cluster right away. It's something I've been wanting since I catch myself looking out the window and not at the speedometer then find out I'm speeding.

VETTLIFE

I have a 98 and was planning on doing this mod, funny because up until now this is the first I've heard of certain 98 and earlier clusters not supporting the page functions.

How would someone find out theirs doesn't work? and doesn't the odometer give you problems swapping the clusters out?

J. Chris Davis

I do not know how you would know, but since mine is a really late model 98 that my opinion is none of the 98 gauges are properly going to work. I have not seen anyone that truly had success with a 98 cluster. The OP here had a 99 and K-Spaz ended up running into the exact same problem as me. As for the odometer, yes you will need to have it reprogrammed to match. That part is not plug and play it is only stored in the gauge cluster main circuit board. GCG in post 33 posted a link for someone that had previously changed out the odometer chip from board to board.

VETTLIFE

I found this link on replacing the odometer IC on the cluster motherboard here. I'm wondering if there's a way to enable the page functions with a Tech2 instead. Seems the only solution is to swap out the 98 motherboard with the 99+ motherboard (making sure the new motherboards speedo unit's match the cluster) and swap over the odo IC to correct the mileage afterwards.