1989 f150 4.9L 6yl, efi temperature guage - Ford Truck Enthusiasts Forums



1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

1989 f150 4.9L 6yl, efi temperature guage

Reply
 
 
 
Thread Tools Search this Thread
  #1  
Old 06-17-2017, 08:30 PM
MADCleveland MADCleveland is offline
New User
Thread Starter
 
Join Date: Jun 2017
Posts: 1
MADCleveland is starting off with a positive reputation.
1989 f150 4.9L 6yl, efi temperature guage

My temp guage in the dash didn't work very well and now not at all. I've changed the sensor (one wire, lower right side above starter) and the guage tests correctly when grounded --- needle moves to the far right of the dial. However, the the gauge is connected, the guage does not appear to be working.
The needles moves to the left a bit when the ignition is engaged and stays there until the engine is shut off. The guage needles them moves slowly to the right to its original position (on the C).

Any suggestions what the problem may be. Thank you.
Reply With Quote
  #2  
Old 06-18-2017, 10:13 PM
ChRoNo16's Avatar
ChRoNo16 ChRoNo16 is offline
Senior User
 
Join Date: Dec 2010
Location: Shafer, MN
Posts: 198
ChRoNo16 is starting off with a positive reputation.
I dont know the 4.9 very well, best advice I can give is to warranty out the sensor it may still be bad.

also check to make sure the thermostat is opening properly.
Reply With Quote
  #3  
Old 06-18-2017, 11:38 PM
Lead Head Lead Head is offline
Post Fiend
 
Join Date: Jul 2007
Location: Rhode Island
Posts: 7,549
Lead Head is a name known to allLead Head is a name known to allLead Head is a name known to allLead Head is a name known to allLead Head is a name known to allLead Head is a name known to all
Try grounding the gauge wire with the engine running and verify the gauge goes full-hot.
Reply With Quote
  #4  
Old 06-19-2017, 08:54 AM
DPDISXR4Ti DPDISXR4Ti is offline
Posting Guru
 
Join Date: Nov 2011
Location: New York
Posts: 1,166
DPDISXR4Ti is gaining momentum as a positive member of FTE.
Quote:
Originally Posted by Lead Head View Post
Try grounding the gauge wire with the engine running and verify the gauge goes full-hot.
Reading above, it sounds like he's already done that.

Did you use Teflon tape on the switch? Maybe you're not getting a good ground with the threads to the block. I also agree that you could have a thermostat stuck open, but this time of year you'd usually eventually warm up, just more slowly.
Reply With Quote
  #5  
Old 06-19-2017, 11:09 AM
Lead Head Lead Head is offline
Post Fiend
 
Join Date: Jul 2007
Location: Rhode Island
Posts: 7,549
Lead Head is a name known to allLead Head is a name known to allLead Head is a name known to allLead Head is a name known to allLead Head is a name known to allLead Head is a name known to all
Quote:
Originally Posted by DPDISXR4Ti View Post
Reading above, it sounds like he's already done that.

Did you use Teflon tape on the switch? Maybe you're not getting a good ground with the threads to the block. I also agree that you could have a thermostat stuck open, but this time of year you'd usually eventually warm up, just more slowly.
I mean grounding the gauge wire with the engine running vs. just key on.
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1989 F250 Temp non-functioning guage philv 1987 - 1996 F150 & Larger F-Series Trucks 5 01-01-2017 10:31 AM
Fuel Guage not working TheGreaseMonkey88 1987 - 1996 F150 & Larger F-Series Trucks 0 08-13-2016 06:50 PM
Oil pressure guage reading wrong Goinnuts 1961 - 1966 F-100 & Larger F-Series Trucks 9 12-02-2015 03:12 AM
dash guage lights out lawmac2005 1999 to 2016 Super Duty 9 12-10-2010 03:08 PM
Temp guage not working hbronco Cooling, Heating, Ventilation & A/C 5 02-20-2004 05:36 PM


Go Back   Ford Truck Enthusiasts Forums >

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 Off
Refbacks are Off

Forum Jump


All times are GMT -5. The time now is 07:11 PM.