My horn on 2010 ram sport stopped working,just clicks under the hood by the fuse box when i press it.I cannot find the relay for this horn,it works sometimes,please help to find this relay.

 

There is a link to the wiring diagrams in the DIY section here. I looked at the horns functions and I don't think there is a relay used. The TIPM shows 2 fuses for the horns. Horn1 is fuse M37 and Horn2 is M43.

 

thanks i checked the fuses they look good going to the dealer tomorrow to see whats up,thanks.

 

Sounds like the relay is workin,is there 12 volt at the horn? if so just go buy a new horn somewhere besides the dealer

 

this is the way it works:

Horn switch position is monitored by the Cab Component Node (CCN) in the cluster. Within the CCN is the Local Interface Network (LIN). The LIN then sends a "Horn Request" message to the TIPM using the CAN bus. The TIPM honors this request by switching 12 VDC from the battery to the horns via the 2 fuses. The "switch" that the TIPM uses is part of the "Chrysler Proprietary" electronics, thus not shown to us. So I can't tell you if it's a relay soldered down to the TIPM circuit board, a mechanical switch or some kind of transistor. If you hear switching going on, then it's probably mechanical. Basically, the way to test this is to put a voltmeter on one of the horns and see if you are getting +12VDC when you press the horn switch on the wheel. if you don't get the +12VDC and the fuses are good, then the dealers will monitor the CAN bus message into the TIPM. If the TIPM receives the "Horn Request" and you still have no +12VDC to the horns, I'm afraid they will try to sell you a new TIPM as they are not in the business of repairing them.