Speedometer & Tachometer not registering - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Electrical
Where does this wire go?
Includes Electrical mods, Lights, Stator,
Rectifier, Diagrams, etc

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 29 (permalink) Old 07-09-2008, 09:06 PM Thread Starter
Members who have donated towards server costs
 
PoggiPj's Avatar
 
Join Date: Jun 2008
Location: Gaithersburg, MD
Posts: 189
iTrader: (0)
 
Send a message via AIM to PoggiPj
Speedometer & Tachometer not registering

I am restoring a 1996 Vulcan 750. The lights go on for both the Speedometer and the Tachometer, both of which are brand new out of the box. However, the tach does not register any RPMs when idling or accelerating and the speedometer doesn't register MPH.

Does anyone have a suggestion?

Regards,
Pete in Gaithersburg, MD

1996, 6,000 miles
Relocated R/R, Corbin seat, Plexifairing III, Sunpro Voltmeter, Sears MF.
Xelement X840 Saddlebags
PoggiPj is offline  
Sponsored Links
Advertisement
 
post #2 of 29 (permalink) Old 07-10-2008, 03:49 AM
Members who have donated towards server costs
 
ChrisC's Avatar
 
Join Date: Apr 2008
Location: Wayne, NJ
Posts: 405
iTrader: (3)
 
These sound like two separate issues. The speedo gets its input mechanically from the front wheel. The tach works on an electrical signal from the ignition system. For the speedo, check the cable connection at the speedo gear on the front wheel, and also check that the cable is completely seated in the speedo gauge. If both ends are seated, disconnect the end at the gauge and make sure that it is turning when the front wheel turns, if not the problem is on the gear side, or the cable itself. For the tach, check the connector in the tach housing, and the connector that should be in the headlight housing. If they are seated properly, check/clean the connector. Finally, if still no joy, trace the wires. The black, black/yellow (common), and brown wires run to the tach, the red/blue wire to the tach lights, and the yellow/white to the temp gauge. Some of the more experienced folks can fill in any gaps I left. Good luck!

Chris
Wayne, NJ
1989 VN750-A5
VROC #27781
-Replaced/Fused Stator & Replaced/Relocated R/R (15K mi.)
-MF Battery
-De-Goated/Re-goated
-Coastered
-Splines Lubed
-Stebel Nautilus Horn
-AutoMeter 2" VOM
-Silverstar Headlight
-Refinished Gauge Rings and Mirrors(Flat Black)
-Refinished Swingarm/Lubed Pivots
-K&S Turn Signals Clear Cover/Amber Bulb
-Kenda Kruz 110/90-19 front 170/80-15 rear
-Clear Alternatives LED tail light
-Plexifairing III
-Willie & Max Saddlebags and SissyBar Bag
ChrisC is offline  
post #3 of 29 (permalink) Old 07-10-2008, 10:01 AM Thread Starter
Members who have donated towards server costs
 
PoggiPj's Avatar
 
Join Date: Jun 2008
Location: Gaithersburg, MD
Posts: 189
iTrader: (0)
 
Send a message via AIM to PoggiPj
Quote:
Originally Posted by ChrisC View Post
and the connector that should be in the headlight housing.
Interesting! I didn't know about a connector in the headlight housing.... When I installed the new tach, there were two connection points - a three wire connection in a plastic housing that snaps into a holder in the back of the tach, and then a single wire quick disconnect. Can you elaborate on what is connected in the headlight housing?

Thank you Chris.

Regards,
Pete in Gaithersburg, MD

1996, 6,000 miles
Relocated R/R, Corbin seat, Plexifairing III, Sunpro Voltmeter, Sears MF.
Xelement X840 Saddlebags
PoggiPj is offline  
 
post #4 of 29 (permalink) Old 07-10-2008, 12:39 PM
Members who have donated towards server costs
 
ChrisC's Avatar
 
Join Date: Apr 2008
Location: Wayne, NJ
Posts: 405
iTrader: (3)
 
The other end of the tach and Speedo electrical connections connect to the main harness usually in the headlight bucket. There's a lot of wire in there but not a whole lot of room. IIRC there is a 2-pin, 6-pin, and 9-pin connector behind the headlight, in addition to two accessory lugs, the turn signal bullets, and one bullet for the reserve lighting system. The 2 pin is the speedo lights, and the 6-pin is the tach gauge and light connector. I seem to remember the 6 pin only having 5 wires, but since I typically can't remember what I had for breakfast on any given day, don't hold me to it!

Chris
Wayne, NJ
1989 VN750-A5
VROC #27781
-Replaced/Fused Stator & Replaced/Relocated R/R (15K mi.)
-MF Battery
-De-Goated/Re-goated
-Coastered
-Splines Lubed
-Stebel Nautilus Horn
-AutoMeter 2" VOM
-Silverstar Headlight
-Refinished Gauge Rings and Mirrors(Flat Black)
-Refinished Swingarm/Lubed Pivots
-K&S Turn Signals Clear Cover/Amber Bulb
-Kenda Kruz 110/90-19 front 170/80-15 rear
-Clear Alternatives LED tail light
-Plexifairing III
-Willie & Max Saddlebags and SissyBar Bag
ChrisC is offline  
post #5 of 29 (permalink) Old 07-10-2008, 10:43 PM Thread Starter
Members who have donated towards server costs
 
PoggiPj's Avatar
 
Join Date: Jun 2008
Location: Gaithersburg, MD
Posts: 189
iTrader: (0)
 
Send a message via AIM to PoggiPj
I checked the connectors, and sprayed them with contact cleaner, reseated them. The Tach lights work fine. In looking at the wiring diagram, the black/yellow is ground, brown is +12, and the black wire traces back to the IC Ignitor. Isn't that where it picks up the RPM signal? I wonder what kind of reading i should get if i put a VM between brown and ground?

Regards,
Pete in Gaithersburg, MD

1996, 6,000 miles
Relocated R/R, Corbin seat, Plexifairing III, Sunpro Voltmeter, Sears MF.
Xelement X840 Saddlebags
PoggiPj is offline  
post #6 of 29 (permalink) Old 07-11-2008, 06:34 AM
Sparky!!!
 
slimvulcanrider's Avatar
 
Join Date: May 2008
Posts: 8,695
iTrader: (3)
   
Garage
are you checking for volts between brown and ground??? if so it should be the same as battery reading... and the same as brown at the R/R....if you are checking for continuity it should be nil.

The black wire that goes back to the Ignitor Box is the rpm signal wire
slimvulcanrider is offline  
post #7 of 29 (permalink) Old 07-11-2008, 10:13 AM Thread Starter
Members who have donated towards server costs
 
PoggiPj's Avatar
 
Join Date: Jun 2008
Location: Gaithersburg, MD
Posts: 189
iTrader: (0)
 
Send a message via AIM to PoggiPj
Thanks Slim. Actually it was late last night when I wrote that. What I meant to ask, is what kind of a reading should I see if I test the black (RPM signal) wire.

Regards,
Pete in Gaithersburg, MD

1996, 6,000 miles
Relocated R/R, Corbin seat, Plexifairing III, Sunpro Voltmeter, Sears MF.
Xelement X840 Saddlebags
PoggiPj is offline  
post #8 of 29 (permalink) Old 07-11-2008, 04:22 PM
Sparky!!!
 
slimvulcanrider's Avatar
 
Join Date: May 2008
Posts: 8,695
iTrader: (3)
   
Garage
hmm good question...not sure if a multimeter set to volts will give you the correct numbers...brb...going to go test my bike...then i will give you the numbers i come up with...and the multimeter settings
slimvulcanrider is offline  
post #9 of 29 (permalink) Old 07-11-2008, 04:43 PM
Sparky!!!
 
slimvulcanrider's Avatar
 
Join Date: May 2008
Posts: 8,695
iTrader: (3)
   
Garage
ok, just went out to the bike and ran some tests...first off the voltage test is inconclusive as it just gives you current charging state of the battery...IE I got 12.5 V at idle, 13.5 Volts @ 4,000 RPM, and 3.8 volts @5,500 RPM both at the black wire and the battery. So I then tried AC....nada...I then checked the Hz, and this was changing 1Hz for every RPM... Idle was 867 Hz, 2000 RPM= 2000Hz and so on and so forth. If your MM won't read Hz, I would check continuity between the connector in the headlamp and the Ignitor Box.
slimvulcanrider is offline  
post #10 of 29 (permalink) Old 07-12-2008, 12:05 AM Thread Starter
Members who have donated towards server costs
 
PoggiPj's Avatar
 
Join Date: Jun 2008
Location: Gaithersburg, MD
Posts: 189
iTrader: (0)
 
Send a message via AIM to PoggiPj
Thank you so much Slim, for going to the trouble to check that out! I checked, and my multimeter does check Hz. So first thing tomorrow I'm going to fire it up and check first for the Hz, and if i don't get a reading I'll check the continuity. The Coolant temp part of the instrument is definitely giving me a reading.

Regards,
Pete in Gaithersburg, MD

1996, 6,000 miles
Relocated R/R, Corbin seat, Plexifairing III, Sunpro Voltmeter, Sears MF.
Xelement X840 Saddlebags
PoggiPj is offline  
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

Once registered, your User Name"cannot be changed". We can make exceptions within 7 days, but after that, it is set in stone.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome