Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 05-05-2012, 12:20 PM   #1
Join Date: Sep 2010
Posts: 51
Erratic Speedometer Not Showing Speed

I have a 2000 Winnebago Journey on a Freightliner chassis.
My speedometer stops registering at various times. The Tach still operates, but not speedometer. It just starts and stops at ramdom. Not sure where to start troublsooting first.
Any ideas?
Bill Miller - Currently in RV Park at Point Mugu Naval Base in California.

K5EAG is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 05-05-2012, 12:37 PM   #2
Senior Member
Join Date: Nov 2011
Location: Full time RV'er
Posts: 1,238
What I would do is attach wires to the two lugs on the back of the speedo and run them out where I can attach a digital meter to them. Then monitor to see if the voltage disappears or not when the speedo stops registering. If it doesn't, the meter itself is bad. If it does, then the problem is the module or the wiring back to the module.

'02 Winnebago Journey DL, DSDP, 36' of fun.

Visit my RV Travel & Repair Blog at : http://chaos.goblinbox.com
Jim_HiTek is offline   Reply With Quote
Old 05-05-2012, 09:57 PM   #3
Senior Member
Join Date: Nov 2003
Location: Richmond Hill, GA USA
Posts: 623
The instruments in your Freightliner are not like instruments in an auto.

Each instrument is connected to a common data bus, and selects the data it needs from the bus. You can actually unplug the tach and speedometer, swap the connectors, replug, and they should still work.

Go to http://ww2.justanswer.com/uploads/go...44_sbu5412.pdf

and download Freightliner Service Bulletin 54-12. It has a section on troubleshooting the instruments. After following the steps in SB 54-12, if you still have trouble, call the Freightliner Help Desk at 1 800 385-4357. Have your VIN number available when you call. They've been very helpful to me.

FYI...I've seen my speedo coast down from 65 to zero while the VMSpc display still showed 65 coming from the data bus. At the next stop, it started working again and no more failures.

From your description, I suspect a dirty connector so swapping the cable between the tach and the speedo might be a good first step.

Fred & Vicki
Richmond Hill, Ga
2000 H.R.Endeavor/Freightliner/330 Cat
Fred Cooper is offline   Reply With Quote
Old 05-06-2012, 12:43 AM   #4
Senior Member
Skip426's Avatar

Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 11,950
Hi there just posting to this thread to track the link. Can't get enough band width on the park wi-fi to open it , have to wait till I get home.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
Skip426 is offline   Reply With Quote
Old 05-06-2012, 08:11 AM   #5
Senior Member
Join Date: Feb 2011
Location: Snowbird - Waterford Mi and Citrus Springs Fl.
Posts: 3,343
Experienced this recently, leaving me stranded, led to eventual discovery of a loose sensor connector on the side of the transmission. Details available here:

More Kudos for Freightliner tech support!!
1997 37' HR Endeavor, 275hp Cat, Freightliner
03 CR-V Blue Ox, Ready Brake
ahicks is offline   Reply With Quote
Old 05-06-2012, 03:55 PM   #6
Registered User
Join Date: Jun 2011
Posts: 69
Make it easy on yourself. Download an app called 'Speedhud' for the iphone and probably droid. Far more accurate than any speedo ever made. Speedometers, after this, are completely obsolete.
buki is offline   Reply With Quote
Old 05-06-2012, 04:05 PM   #7
Registered User
Join Date: Jun 2011
Posts: 69
In fact...smart manufacturers would eliminate expensive factory installed speedos and either reduce the price of the coach (yeah right) or boost their bottom line. I have everything they can do and more for 99 cents.
buki is offline   Reply With Quote
Old 05-06-2012, 05:07 PM   #8
Senior Member
Join Date: May 2012
Posts: 225
I use my Garmin 765 for speed info.

Flickr: grafxmangrafxman's Photostream
grafxman is offline   Reply With Quote
Old 05-06-2012, 05:22 PM   #9
Senior Member
trackman's Avatar
Join Date: Oct 2011
Posts: 1,136
Tom Tom is the most accurate in the business.PLUG IT IN AND FORGET THE DASH SPEED

trackman is offline   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Virginia Campgrounds

Reviews provided by

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 08:04 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.