You are here:

Dodge Repair/'03 Ram 2500:speedo,airbag,A.C,mirrors, bell


I have a 2003 Dodge Ram 2500 4x4 Quad Cab Truck.5.7L My symptoms are: Speedometer doesn't work, airbag light is on, heated mirrors don't work and A/C not working. A bell rings on and off.
Is this a result of a blown fuse, or faulty wires or sensors.
I appreciate your help.

Hi Paula,
The issue could be fuses and one sensor, for a starting point:
The speedo signal is generated by an "output speed sensor" located on the side of the transmission at the back end of. Its two wires go the transmission control module and there the signal is combined with others and sent elsewhere specifically in this case to the instrument cluster on a digital pair of wires. Because only the speedo reading is not showing it is either that output speed sensor or one of its wires, and if those are OK then the problem is internal to the cluster speedo unit. I would check the sensor first particularly if there is any apparent malfunction in the gear shift behavior at various speeds which also need that sensor signal to shift properly.
On the air bag light, start by checking fuses 52 and 53 in the power box in the engine compartment. If both of those are fine, then it will be necessary to do a fault code readout using a diagnostic readout box at a shop to get a handle on what is wrong.
On the heated mirrors check fuses 17, 27, and 36 in the power box.
On the A/C the usual cause of not working is that the refrigerant needs to be added to. You can buy a kit for that and try adding about 12 oz. and see if that is enough to restore the charge of refrigerant to the necessary level.
On the bell ringing, I would check your owners manual and see what sorts of issues cause that to happen. Let me know of the possibilities that your find, though it may be the air bag light being "on" also caused the bell.
Let me know if you want more details.

Dodge Repair

All Answers

Answers by Expert:

Ask Experts


Roland Finston


Free fast answer to your repair question about a Chrysler/Dodge/Plymouth car, minivan, SUV, or truck. Problems with electronically controlled engines and transmissions as well as body wiring problems are my specialty. This free troubleshoot advice forum helps you diagnose faults, minimize repair costs or do-it-yourself.

I answer questions seven days a week and respond to you in about 30 minutes. "Maxed Out" means I am answering another question or asleep overnight so try again later.

I have do-it-yourself experience (50+ years) and a library of 100 1982-2011 Chrysler factory shop manuals and 20 multi-manual Chrysler Corp. CD's.

I was voted "Top expert" from 2010-2015 here at AllExperts, and have answered 20,000+ questions.


Five decades as a 'do-it-yourselfer' on domestic and imported cars

Yahoo Autos Group called The Chrysler Lebaron Club (co-moderator)

Degrees in Physics/bruised knuckles.

Awards and Honors
"Top expert" of 2010, 2011, 2012, 2013, 2014, and 2015 here at Allexperts. Quickest "average response time" at Allexperts (currently no. 1).

©2016 All rights reserved.