Horn no blow - Jeep Compass Forum
  • 1 Post By JeepCares
LinkBack Thread Tools Search this Thread
post #1 of 3 Old 02-26-2014, 08:09 PM Thread Starter
Junior Member
Join Date: Aug 2010
Posts: 18
Horn no blow

I have a 2007 Compass. Within the last two weeks the horn has stopped working. My experience is with old trucks... Is this something I can fix, ie: easy electrical, or is it more of a failed computer chip?

If I take off the horn pad will I see perhaps a mechanical failure or loss of contact?

PAJeep is offline  
Sponsored Links
post #2 of 3 Old 02-27-2014, 01:01 PM
Senior Member
Join Date: Apr 2012
Posts: 378
I can't really diagnose your vehicle, but I can give you some info that might help you. (Just ignore if not interested.)

Your vehicle has airbags.
Disconnect the battery negative cable before replacing any parts.

from the 2007 Factory Service Manual (FSM):

A single note (domestic) or dual note (export) electric horn system is installed on this vehicle.
The horn system features electromagnetic horn(s). The horn system includes the following major components:
Cab Compartment Node CCN) - The CCN integral to the instrument cluster.
Horn - The horn(s) are located on the left and right side frame rail.
Horn Switch - The horn switch is located under the driver airbag.
Total Integrated Power Module (TIPM) - The TIPM is located in the left front portion of the engine compartment

The horn system operates on battery current received through the Totally Integrated Power Module (TIPM). A signal is received by the TIPM from the Cab Compartment Node (CCN) over the Controller Area Network (CAN) Bus when the horn switch is pressed, and the horn(s) sound(s). The horn system circuit is designed so that the system will remain operational, regardless of the ignition switch position.

Diagnosis and Testing

1. Check fuse 23 in the tipm. 1. Replace fuse if inoperative.
2. No voltage at horn relay terminals 62 AND 66 and fuse is ok. 2. No voltage, repair TIPM as necessary.
3. Open circuit from terminal 65 of the relay to horn switch x3 circuit. 3. Repair circuit as necessary.
4. Inoperative or damaged horn. 4. Voltage at horn when horn switch is pressed, replace horn.
5. Inoperative horn switch 5. Replace horn switch.

1. Disconnect wire connector at horn.
2. Using a voltmeter, connect one lead to ground terminal and the other lead to the positive wire terminal.
3. Depress the horn switch, battery voltage should be present.
4. If no voltage,(Refer to 08 - Electrical/8H - Horn - Diagnosis and Testing) . If voltage is OK, go to Step #5.
5. Using ohmmeter, test ground wire for continuity to ground.
6. If no ground repair as necessary.
7. If wires test OK and horn does not sound, replace horn.
wojeda likes this.
JeepCares is online now  
post #3 of 3 Old 02-27-2014, 07:52 PM Thread Starter
Junior Member
Join Date: Aug 2010
Posts: 18
lee, that is excellent info!

Thanks. Now I have to wait until it warms up here in PA to work on it!
PAJeep is offline  

Quick Reply

Register Now

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

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


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

Email Address:


Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search

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