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Instrument panel guages quit. Getting 'No Bus' error in odometer.
Hi, I've recently encounted some issues with my 05 dodge ram truck. I'm not sure if this is instrument cluster or raido related or not, but I've found evidence online that it could be. The problem was while driving, I suddenly lost my instrument panel guages. They stopped working, all lighting came on and a 'No Bus' error was dislayed, although the truck still ran fine. Long story short, ive done some research, and the error means the instrument cluster is not receiving messages from all PCM modules or something like that. I've read that the problem could be b/c or a faulter instrument cluster and also because there is a white/violet striped wire connecting all vehicle modules including cluster, radio, amp, ABS controller, A/C controller, and more. A problem with this wire somewhere could cause the issue. I recently swapped out my stock headunit for an aftermarket panasonic and wired it up myself using a wiring diagram I found online. One of the wires is a white/violet wire. The diagram did not list its use, and without it everything seemed to work fine so I left it disconnected. Whats weird is that everything worked fine for a few months until this happened yesterday. Does this wire need to be connected to the headunit via ACC, or ground or something?? Or can I just leave it as it is (plastic cap over cut end). Ive not found any info anywhere that mentions what should be done with this wire when installing an aftermarket unit. Any help is apprecated. Thanks -Keith
i had this problem , all you need to do is hook the ground wire from your new radio to the braided wire that hooked on your old radio and insert a bolt in the hole and tightin ,then check fuses and your dash lights will work and dome light.
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If the odometer on your 2003 Dodge Ram 2500 is not working, there are a few things that could be causing the issue. Some possible causes include:
Fuse: Check the fuse for the odometer. If it is blown, replace it with a new fuse of the same amperage.
Instrument cluster: The problem may be with the instrument cluster itself. If this is the case, you may need to have the cluster repaired or replaced.
Speed sensor: The odometer is connected to the speed sensor, which sends a signal to the instrument cluster to indicate the vehicle's speed. If the speed sensor is not working properly, the odometer may not function correctly.
Wiring: The wiring connecting the odometer to the rest of the vehicle's electrical system may be damaged or corroded. If this is the case, the wiring will need to be repaired or replaced.
Computer: The problem could be with the vehicle's computer. If the odometer is not working, there could be a malfunction in the computer that controls the odometer.
It's important to have a professional mechanic to diagnose the issue and confirm what the problem is before trying to fix it.
If you are not comfortable with troubleshooting the issue yourself, it's best to contact a Dodge Ram mechanic or dealership for further assistance. https://amzn.to/3kfOLX4 https://amzn.to/3ZBjQ7M
I'd have to check voltage and ground for the instrument cluster. I noticed one of the fuses for your instrument cluster goes hot with the key on, same thing for ac compressor. I'd have to voltage feed to and from ignition switch for applicable fuse. Check the ignition switch wiring connector. I can't rule out ignition switch itself, at the moment.
There could be other issues?
Ignition switch faults are common on some makes and models.
Instrument cluster wiring connector problems. Sometimes if you disconnect and reconnect the instrument cluster connector, it may start working again, also, cycling the instrument cluster connector may reset, if it starts working, well, it's working for now, may quit again.
Some instrument clusters may do a self test, don't know about yours?
Press and hold odometer reset button, turn key to run position release odometer reset button, watch the odometer. Your indicator lamps may turn on and off, the gages may cycle in small increments. The cluster will exit self test on its own.
You may have to check buss circuits.
There may be a problem with the connection or the wiring harness between the instrument cluster and the body computer.
No Bus means no signal or power on the line between the two computers.
you probbally popped a fuse. Check all fuses in the car and trailer. Make sure all the lights are in good condition and that the connections going to the trailer from the car are in good shape.
Check all fuses under hood and on end of dash don't just look test them, 95 dodges had a recall on key switch burning out, bad connector in column and to relay under dash, check all those options
All the modules are connected together to communicate with each other via the PCI bus. It is possible that one of the modules is pulling the bus down.Since the vehicle won't start it could be any one of the modules. It will be a process of elimination to find the faulty one by disconnecting them one at a time. Here are a few, powertrain control module (the one you replaced) Instrument cluster, overhead console, anti-lock brakes, airbag. Since the cluster unplugged wont read anymore, just try to start the vehicle to see if that was the one. Otherwise see if the odometer message of "no bus" goes away after each one is unplugged.
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