XJ6 & XJ12 Series I, II & III 1968-1992

71 XJ6 tachometer not working

 
  #1  
Old 08-30-2016, 12:32 PM
Member
Thread Starter
Join Date: Feb 2016
Location: Illinois
Posts: 45
Likes: 0
Received 13 Likes on 5 Posts
Default 71 XJ6 tachometer not working

Hi everyone:
the tachometer is inoperative, and has been since we purchased the car (35k original miles).

The needle is pegged all the way to the right (redline), I do not know if this means anything. All the other gauges are working.

Any assistance would be appreciated, and thanks in advance!
Paul
 
  #2  
Old 09-03-2016, 08:05 PM
Member
Thread Starter
Join Date: Feb 2016
Location: Illinois
Posts: 45
Likes: 0
Received 13 Likes on 5 Posts
Default

Bump?
Anyone?
 
  #3  
Old 09-03-2016, 08:26 PM
Veteran Member
Join Date: Mar 2008
Location: Pacific Northwest USA
Posts: 20,160
Received 6,562 Likes on 4,864 Posts
Default

My guess is a mechanical failure somewhere in the innards of the thing....that is, something simply broke....and that an instrument repair shop can fix things up.

Cheers
DD
 
  #4  
Old 09-04-2016, 09:53 AM
Veteran Member
Join Date: Jul 2012
Location: Walnut Creek, California
Posts: 5,737
Received 1,947 Likes on 1,570 Posts
Default

Or, a lessor guess.


Most rely on the make and break of the distributor to create a pulse, in turn converted to mechanical movement. Classic electro mechanical technology. As it is the ground leg that is make and break, I would suspect it is grounded all the time, not off and on ground...


Find the ground lead to the - post on the tach. Disconnect it. Fire the engine. If it drops to 0, I got it. If not, Doug's theorem is most likely.


Carl
 
  #5  
Old 09-05-2016, 11:43 AM
Member
Thread Starter
Join Date: Feb 2016
Location: Illinois
Posts: 45
Likes: 0
Received 13 Likes on 5 Posts
Default

Thanks! I will check all wiring (at the tach too). Everything at the distributor and coil is connected, but I will try disconnecting and turn the car on to see what does or does not happen.

Will keep all posted.
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
CougCol
PRIVATE For Sale / Trade or Buy Classifieds
0
05-12-2016 01:52 AM
Kief
F-Type ( X152 )
51
04-26-2016 10:29 AM
declipse91
XJ6 & XJ12 Series I, II & III
6
10-03-2007 11:35 AM
BlackClouds
XJS ( X27 )
0
08-12-2007 06:34 PM
XK8 / XKR ( X100 )
3
01-02-2007 06:45 AM

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

Thread Tools
Search this Thread
Quick Reply: 71 XJ6 tachometer not working


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: