Problem with glow plugs/heater. please help - Diesel Truck Forum - TheDieselGarage.com
Thread Details Posted by Gear Jammer, this thread has received 6 replies and been viewed 700 times.

 
LinkBack Thread Tools Display Modes
post #1 of 7 (permalink) Old 11-12-2007, 04:15 PM Thread Starter
 
Join Date: Nov 2007
Posts: 2
Points: 44
Thanks: 0
Thanked 0 Times in 0 Posts
Problem with glow plugs/heater. please help

Hey guys! Long time reader but first time poster. A neighbor of mine has a 01' 24v that is having problems with the glow plugs/heater. He says he can ground the two relays and make the glow plugs/heater come on. However, they will not cycle on by turning the ignition key on. Are the relays bad or is their something else to look for? (fuses,Fuse links, grounds etc...). Any help greatly appreciated. Happy veterans day to all the service men and women
Gear Jammer is offline  
Sponsored Links
Advertisement
 
post #2 of 7 (permalink) Old 11-12-2007, 05:20 PM
Bouncer
Guest
 
Posts: n/a
Points: 0 [Check]
It could be the relays, IAT sensor, or ECM. Although I would be more inclined to think it is the IAT "intake air temperature" sensor. It senses the temperature inside the intake and tells the ECM when to turn the relays on and off.
post #3 of 7 (permalink) Old 11-12-2007, 06:40 PM
 
Join Date: Dec 2008
Posts: 2,189
Points: 44,827
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by Bouncer
It could be the relays, IAT sensor, or ECM. Although I would be more inclined to think it is the IAT "intake air temperature" sensor. It senses the temperature inside the intake and tells the ECM when to turn the relays on and off.

:iagree

I still wouldn't rule out the ECM doing something goofy though.
Smokem is offline  
post #4 of 7 (permalink) Old 11-12-2007, 07:25 PM Thread Starter
Threadstarter
 
Join Date: Nov 2007
Posts: 2
Points: 44
Thanks: 0
Thanked 0 Times in 0 Posts
Thanks for the info. There appears to be two sensors in the intake. Which one is the intake air temp. sensor? (IAT). Thanks in advance.
Gear Jammer is offline  
post #5 of 7 (permalink) Old 11-25-2007, 12:52 AM
Senior Member
 
Join Date: Jan 2009
Location: Billerica MA
Posts: 454
Points: 24,831
Thanks: 6
Thanked 14 Times in 14 Posts
Quote:
Originally Posted by Gear Jammer
Thanks for the info. There appears to be two sensors in the intake. Which one is the intake air temp. sensor? (IAT). Thanks in advance.

One is the IAT sonsor and the other is the MAP sensor which senses turbo boost. Get the Chiltons/Haynes service manual it will tell you which is which, but the full dodge service manual from genoe's garage is better detailed.
cumminsdude2001 is offline  
post #6 of 7 (permalink) Old 11-25-2007, 01:43 PM
2nd Gen Guru
 
Mopar1973Man's Avatar
 
Join Date: Dec 2008
Location: New Meadows, Idaho
Posts: 2,641
Points: 54,835
Thanks: 9
Thanked 140 Times in 131 Posts
Garage
Send a message via Yahoo to Mopar1973Man
Here is a pic of the location of the MAP and IAT sensors...


Grid heater are triggered by the IAT temps. If the IAT sensors sees temps below 60*F - 65*F it will cause the grid heater to trigger... If the sensor is oil coated then it might not see temps properly...

There is two relays on the fender that trigger the power for the grid heaters. It has been know that these relay will fail now and then... a Ford starter solenoid will work in replacement.

Then follow the 2 heavy black leads to the battery you'll find a fuse-able link in the line you'll need to check if power is getting to the relays.

Grid heater them self don't normally fail but it has happen. Check for continuity across the grid heaters to see if they haven't burnt out...

Michael Nelson - 2002 Dodge Cummins & 1996 Dodge Ram 5.9L Gasser
116K Miles On My VP44 - 4 Years of 2 Cycle Oil Diet! - Mixed at 128:1 Ratio - 25.3 MPG maxed out!
Mopar1973Man is offline  
post #7 of 7 (permalink) Old 11-26-2007, 06:09 PM
 
Join Date: Oct 2005
Posts: 69
Points: 1,422
Thanks: 0
Thanked 0 Times in 0 Posts
I am having the same problems with my truck...the grid heater isn't working. I'll check sensors and relays and make sure im getting power to the grid heater.

Thanks for the help Moparman and Bouncer
gmperformance03 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Diesel Truck Forum - TheDieselGarage.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome