home register FAQ memberlist calendar

Go Back   Turbobricks Forums > Mechanical > maintenance & nonperformance

Reply
 
Thread Tools Display Modes
Old 08-16-2014, 10:59 PM   #1
Cyracus
Newbie
 
Join Date: Feb 2014
Location: Portland, OR
Default odometer not working...'90 240

bypassed the temp comp board, thought I put everything back the same it came out, but the odometer isn't working, was working great before, and everything else is fully functional still. Double checked that connectors were fully seated, and never removed the speedometer housing from the board so it shouldn't be the gears. Anybody got an idea why my odometer suddenly isn't working?

Addendum: went for a drive again, at one stop noticed my speedometer rose to about 90 then dropped off the right side, then when I was pulling into my driveway my odometer suddenly started working again. Is there some way the transmitter may have got damaged?
__________________
I ask stupid questions because I want to avoid having to fix the things I just fixed

Last edited by Cyracus; 08-17-2014 at 01:55 AM..
Cyracus is offline   Reply With Quote
Old 08-17-2014, 10:09 AM   #2
dbarton
Bored Member
 
dbarton's Avatar
 
Join Date: Nov 2002
Location: North of Dallas
Default

In my odometer repair page I outline a small number of the emails I've received from people who have experienced dead odometers after doing work on them. There are many who have then seen the odo mysteriously come back to life after some driving. While the cause is one of those mysteries that may never be explained, the common thread may be disconnecting the power plug on the back of the speedo. Some think there may be some sort of reset breaker that takes some time to reset in some cars.
Dave B
__________________

'84 242ti, still a daily driver, Original and still excellent paint except for the new flat hood, old-school front *because*, B21FT, SDS EFI/MSD IGN, Mitsubishi TD04HL-15G, WC T5 trans, 3.91 rear w/G80 locker, Unitek&ST Phase One cam, Cooling Mist ethanol injection.
Non-Volvo: 2013 Subaru WRX
Dave's Volvo Page
dbarton is offline   Reply With Quote
Old 08-17-2014, 03:10 PM   #3
Cyracus
Newbie
 
Join Date: Feb 2014
Location: Portland, OR
Default

ok, any idea about the speedometer acting funny? It topped out at a dead stop, returned to normal as I drove, then noticed it bouncing around a bit while driving, could it be related to the reset breaker or should I be looking somewhere else?
Cyracus is offline   Reply With Quote
Old 08-17-2014, 03:27 PM   #4
dbarton
Bored Member
 
dbarton's Avatar
 
Join Date: Nov 2002
Location: North of Dallas
Default

It's why I said it's a mystery.
dbarton is offline   Reply With Quote
Old 08-17-2014, 03:53 PM   #5
eparayno
Board Member
 
eparayno's Avatar
 
Join Date: May 2014
Location: San Diego
Default

I read that on your page Dave. I have a 92 so it has the electric cluster. I replaced the gear for the odometer and it would work for a few miles then stop. I re-installed and re-checked everything three times before calling it quits. It started working after an hour long drive and has been working perfectly since then.
eparayno is offline   Reply With Quote
Old 08-18-2014, 01:18 PM   #6
Cyracus
Newbie
 
Join Date: Feb 2014
Location: Portland, OR
Default

well, tried the poke and prod method one person suggested on your site, didn't get me anywhere...oh well, here's to hoping it starts up again soon
Cyracus is offline   Reply With Quote
Old 08-18-2014, 01:39 PM   #7
VB242
Knucklehead Mc Spazatron
 
VB242's Avatar
 
Join Date: Sep 2011
Location: Virginia Beach
Default

One more problem and crush it!
__________________
Microsquirt noob
VB242 is offline   Reply With Quote
Old 08-18-2014, 01:41 PM   #8
n. rippe
Board Member
 
n. rippe's Avatar
 
Join Date: Jul 2005
Location: Denver, CO
Default

Welcome to the club! My odometer doesn't like cold weather.
__________________
1991 744 Turbo
n. rippe is offline   Reply With Quote
Old 08-18-2014, 01:54 PM   #9
cleanflametrap
Noob
 
cleanflametrap's Avatar
 
Join Date: Sep 2009
Location: near baltimore
Default

Quote:
Originally Posted by Cyracus View Post
Addendum: went for a drive again, at one stop noticed my speedometer rose to about 90 then dropped off the right side, then when I was pulling into my driveway my odometer suddenly started working again. Is there some way the transmitter may have got damaged?
What does it mean when you say "dropped off the right side?"
Are the temp and fuel gauges steady?
Are the warning lights coming on as they should in lamp test mode?

All these items get their power through the L-shaped card edge connector you probably plug in last. It could have loose contacts. But, on to the odometer...

The original gear can fall apart in the presence of an East wind this late in its life. But a broken tooth (it takes two missing to stop it entirely) can jam its progress. If any stress was put on the speedo circuit board, you could have intermittent odo where the motor leads join the board - circular cracks.

Mysteries abound in this world, but this is truly fathomable. The 92 gets its ground in two places: one for the divide-by-4 prescaler is in the transmitter loom -- the black wire on that L-shaped plug. Rest of the gauge is through the cluster board. Did you do the temp faker bypass without removing the speedometer gauge? If not, check the pins and sockets where the gauge mates with the cluster board. Easy to get them misaligned.



__________________
-Art
cleanflametrap is offline   Reply With Quote
Old 11-23-2014, 09:17 PM   #10
sailorbenjamin
Board Member
 
Join Date: Oct 2012
Location: New York
Default

That circular crack is the best tip I've gotten all week. Thanks! Really hard to see. Use magnification.
sailorbenjamin is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT -4. The time now is 10:00 PM.

Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2017, vBulletin Solutions, Inc.