Temperature gauge issue - Ranger-Forums - The Ultimate Ford Ranger Resource

2.3L & 2.5L I4 Tech General discussion of 2.3L and 2.5L I4 Ford Ranger engines.

Temperature gauge issue

  #1  
Old 1 Week Ago
Kharon's Avatar
Member
Thread Starter
Join Date: Oct 2018
Location: San Antonio
Posts: 33
Temperature gauge issue

I have a 2008 2.3L my temperature gauge donít work right meaning once I start my truck and drive around it wonít move or sometimes it shoot up to hot or in middle and back down..and wonít move again, what could be the issue ?
also how would I wire a battery voltage meter ?
 
  #2  
Old 1 Week Ago
RF Veteran
iTrader: (1)
Join Date: Jan 2014
Location: Vancouver, BC
Posts: 11,741
I don't see a temp SENDER used in 2008 Rangers
The 2.3l duratec Engines used a CHT(cylinder head temp) sensor for computer instead of ECT sensor

The 2004 and up Rangers use a digital dash, called HEC, hybrid electronic cluster
The gauges "look" analog but they are all controlled by a micro processor on the dash
So computer is probably sending CHT sensor temps to the dash temp gauge

If CHT sensor or its wiring was having a problem I would expect computer to set a code for that........................

Read here: http://www.carlogic.org/bg/data/Ford...ler%20mode.pdf

This will show you how to run thru tests on the gauges and cluster
The HEC is part of the anti-theft system(PATS) as well, so you can't just swap it out, if its unplugged engine will not start, if you put in a different one engine will not start
As far as I know only Ford service center can replace an HEC, and they have to first order it from Ford because only Ford's main service center can program Odometer, Dealers can not
Once the new cluster is delivered they have to "re-marry" the computer and cluster so engine will start

Ford had a bad track record of people swapping in low mile odometers to sell used vehicles for more money so they switched to the HEC in most models in early to mid-2000's


Voltage gauge should be fused and then connected to KEY ON 12v source, and then grounded in the cab, Voltage gauge will DRAIN the battery if it left on full time

2008 has the Smart Junction Box(SJB) behind passenger side kick panel, it has the cab fuse panel
Fuse #10 is 10amp and has KEY ON power, you can use a "Fuse tap" to get voltage gauge reading from there

For back light on gauge
On the dimmer module there should be a Blue/white stripe wire, thats the OUTPUT voltage to the dash bulbs, you can tap that wire to get back light for voltage gauge

You could also just hook back light to the fuse 10 power wire at the gauge and light would be on when gauge was on, no dimming

Some of the digital display voltage meters just have the 2 wires, 12v/ground, no back light
 

Last edited by RonD; 1 Week Ago at 01:15 PM.
  #3  
Old 1 Week Ago
Kharon's Avatar
Member
Thread Starter
Join Date: Oct 2018
Location: San Antonio
Posts: 33
Preformed the test...

Thanks for the link I didnít know there was test you could run, Iíve been yawing my scanner and it didnít help.
i ran the test and it stated if an gauge didnít work during the gauge sweep youíll need to replace it cluster... well thatís now on my to-do list.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
richard rampone
General Technical & Electrical
2
01-02-2013 09:37 PM
nfazer
General Technical & Electrical
8
12-06-2009 02:19 PM
RodeoBum09
SOHC - 2.3L & 2.5L Lima Engines
5
07-30-2009 12:10 PM
95Rangerjunkie
SOHC - 2.3L & 2.5L Lima Engines
5
09-13-2008 12:46 PM
Roger
SOHC - 2.3L & 2.5L Lima Engines
1
06-01-2008 11:59 PM


Thread Tools
Search this Thread
Quick Reply: Temperature gauge issue


Contact Us Sitemap 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.