Instrument panel issues? - Mustang Evolution

Go Back   Mustang Evolution > 4 Cylinder | V6 | Classic Mustangs || Tech and Talk > Classic Mustangs



Reply
 
Thread Tools Search this Thread
Please support our sponsors and let them know you heard about them here!
Old 08-10-2013, 12:22 PM   #1
Registered Member
Regular
 
renouji's Avatar
 
Join Date: Jul 2013
Location: West Jordan
Region: Utah
Posts: 64
Send a message via Yahoo to renouji Send a message via Skype™ to renouji
Instrument panel issues?

So none of my gauges seem to be working right on my 1978 Mustang II. My Tach bounces all over the place, my speedometer bounces around between 10-30 mph no matter how fast I am going, my fuel guage always reads 1/4 of a tank over full no matter how much gas is in the tank, nothing else works either including the lights for the dash. I am at a loss obviously everything is getting power, any advice would be welcome.
renouji is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 08-10-2013, 01:02 PM   #2
Registered Member
Regular
 
Aggiesrok's Avatar
 
Join Date: Jul 2011
Location: Bryan
Region: Texas
Posts: 1,883
Quote:
Originally Posted by renouji View Post
So none of my gauges seem to be working right on my 1978 Mustang II. My Tach bounces all over the place, my speedometer bounces around between 10-30 mph no matter how fast I am going, my fuel guage always reads 1/4 of a tank over full no matter how much gas is in the tank, nothing else works either including the lights for the dash. I am at a loss obviously everything is getting power, any advice would be welcome.
Speedo could be a spring or the gear in the trams or the cable is unraveled. Fuel could be the sending unit in the tank or you could have a bad voltage regulator in the panel. You'll have to make sure you're getting the right voltage and proper grounding to the instruments, then diagnose each gauge individually. Also check each sending unit and the wiring.
__________________
chevy runs deep, Don't step in chevy!

289 - Holley 4150 570cfm; Performer intake; mild cam; MSD HEI; 302 heads; Roller Tips; Hedman Tri-Y headers; H-pipe w/Flowmaster 40's; 9 in posi 3.50; 205/50-17F; 225/50-17R.
Aggiesrok is offline   Reply With Quote
Old 08-10-2013, 01:08 PM   #3
Registered Member
Regular
 
renouji's Avatar
 
Join Date: Jul 2013
Location: West Jordan
Region: Utah
Posts: 64
Send a message via Yahoo to renouji Send a message via Skype™ to renouji
Someone else was saying its prolly the voltage regulator too, how do I diagnose each guage? any good tutorials online?
renouji is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 08-10-2013, 10:00 PM   #4
Registered Member
Regular
 
Aggiesrok's Avatar
 
Join Date: Jul 2011
Location: Bryan
Region: Texas
Posts: 1,883
Quote:
Originally Posted by renouji View Post
Someone else was saying its prolly the voltage regulator too, how do I diagnose each guage? any good tutorials online?
There was an article in mustang monthly. I'm not sure when, but you can google it and find it. It goes through pretty good detail.
__________________
chevy runs deep, Don't step in chevy!

289 - Holley 4150 570cfm; Performer intake; mild cam; MSD HEI; 302 heads; Roller Tips; Hedman Tri-Y headers; H-pipe w/Flowmaster 40's; 9 in posi 3.50; 205/50-17F; 225/50-17R.
Aggiesrok is offline   Reply With Quote
Old 08-12-2013, 08:34 PM   #5
Registered Member
Regular
 
go501green's Avatar
 
Join Date: Apr 2012
Region: Florida
Posts: 102
To check the sending unit you can take the single wire of the unit, stick a screw driver in it and ground it to something. If the needle on the gauge moves then it's the sending unit. If the needle doesn't move it's the gauge.
go501green is offline   Reply With Quote
Reply

Lower Navigation
Go Back   Mustang Evolution > 4 Cylinder | V6 | Classic Mustangs || Tech and Talk > Classic Mustangs

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 On
Refbacks are Off


» Like Us On Facebook



10:26 PM


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0

MustangEvolution.com is in no way associated with or endorsed by Ford Motor Company.