Temperature gauge issue
#1
03-06-2019
Join Date: Oct 2018
Location: San Antonio
Posts: 48
Likes: 0
Received 0 Likes
on
0 Posts
Temperature gauge issue
I have a 2008 2.3L my temperature gauge don’t work right meaning once I start my truck and drive around it won’t move or sometimes it shoot up to hot or in middle and back down..and won’t move again, what could be the issue ?
also how would I wire a battery voltage meter ?
also how would I wire a battery voltage meter ?
#2
03-07-2019
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
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; 03-07-2019 at 01:15 PM.
#3
03-08-2019
Join Date: Oct 2018
Location: San Antonio
Posts: 48
Likes: 0
Received 0 Likes
on
0 Posts
Thread
Thread Starter
Forum
Replies
Last Post
bobhucker
General Technical & Electrical
3
12-27-2018 11:19 AM
Keneye
General Technical & Electrical
2
05-26-2018 06:49 AM
