New here, My Dakota is a 2004 SLT 4.7 V8 crew cab. Have a very strange problem or is this normal? When I have fuse number1 in the PDC and fuse 5 pulled PDC. Fuse 19 in fuse panel pulled. Pulled all the relays just in case in PCD. The multifunction switch unplugged. The ignition switch was replaced ( Thinking that was the problem). Replaced the combination flasher. that is my current state.


Little history. Replaced the factory radio with a double din. All works great and triple checked new pig tail wiring also. Problem was noticed that the radio will power up when turned on with key out. Off. So ok. After being out of town for a few days found a parasitic draw on battery, with all off. about .3 amps. In trouble shooting and looking for draw pulled the radio fuse. Being this was where I was working. Draw goes away. So pulled radio again checked wiring. All good. left radio out no pig tail to factory plug. With fuse in for radio there is 9.9 volts just enough to be able to turn radio on. This is on the acc circuit.

This is where I thought ok the ignition switch was bad. Replaced.

The voltage was still on the acc side.

Started to look at other places on the fuse panel. I found the 9.9 volts on A6 of the combination flasher (fuse 19) acc and only have 12 volts when in run or acc. Or at least I guess. In run or acc I have 12 volts. Fuse 19 is out so the voltage is on black wire coming out of the combination flasher. And only there when fuse 1 in PDC is in place as it powers the combination flasher so hazard flasher lights will operate when truck is off. so through the combination flasher the 9.9 volts is feeding back through the acc circuit. with all pulled bugged out wire and and there are no other shorts or continuity. All lights flashers are working ok

Can anyone else here take a look at what the voltage is or not on the fuse 19 in the fuse panel when your truck is off and verify what your reading is.

 

I'm having the same exact problem and came across your post and joined the forum. Have you figured anything out yet? My truck is a 2004 extended cab 3.7l. If I unplug fuse 19 or the flasher the aftermarket radio works fine turns on and off with the key. Also if I plug the factory radio back in and back probe the acc. Wire voltage drops to around 2 with key off, key on 12v like it should. As soon as you unplug the factory radio acc. Wire stays at 12v.

 

No have not found the problem. Am thinking this was and existing problem. My original radio was trash. Got to a point would not tune always ate cds. So with radio out even new one. No wiring in all original and with a new aftermarket combination flasher or with original , there is on mine 9.98 volts at the black wire on fuse 19. That is feeding into the acc circuit. Disconnected plug from flasher switch, still there. Removed all flasher bulbs, still there. Remove fuse 1 in PDC that powers the combination flasher. It goes away. So next is to get a new OEM combination flasher and see. Aftermarket should be good but never know as it is from China..
Also need too look at the next generation Dakotas to see if Dodge made any changes. Did go to local dealer and the guy who was supposed to be the expert was useless.

 

I have a china radio also from ebay. I was also thinking it could be the radio but with my flasher unplugged or fuse 1 out in the pdc my radio turns on and off with the key like it should just no flasher which made me think it could be a bad flasher back feeding somehow but I have yet to try one. You said you tried an aftermarket one and nothing changed? My problem is a little different my aftermarket radio powers on and just stays on no matter what. Idk if you looked at the wiring diagrams on autozone but there actually pretty good compared to my Haynes manual. It shows connector A31 at the junction block supplies fuse 17,18,&19. Now like I said if I pull fuse 1 in the PDC on mine radio works like it should which is battery constant for the flasher, if I pull the flasher works as it should, if I pull fuse 19 in the fuse box on dash it also works as it should which made me think it was flasher but I don't think it is because if I plug my factory radio in it stops.

Did you check your power outlet on the dash I'm guessing that has power all the time to, that's fuse 17. That power outlet is suppose to be keyed power too. The one I the center console has power all the time.

Also, from the wiring diagrams I've been looking at the 2004s have a violet/yellow wire coming from the radio and going to he central timer module and the DLC and that wire is called a PCI Bus on the wiring diagram. I'm guessing your truck has that to and is the only wire not being used with the aftermarket radio adapter at least on mine, that lead me to what I'm currently trying which is an Axxess XSVI-6502-NAV but haven't got it to communicate yet.
I think our problems are kinda related, check to see if you have that violet/yellow wire if you do try and plug the factory radio back in and see if that 9.9v goes away even tho your factory radio is broken. I think our truck being the last of the second gen I think Chrysler started to implement systems from the 3rd gen possibly, I'm not positive on that tho, but the second gen never had a 3.7 v6 until 04 which they then used in the 05 and up. I'll post if I find anything new.

 

With everything pulled as in radios so that wiring is all original no aftermarket cables and such at the acc/run wire going to the radio coming off the the radio fuse there is 9.9 volts. Goes away when you pull fuse 19.

 

Yeah, that's what mine was doing, plug the stock radio back in and then back probe that red/white acc. wire going to the radio and see if it goes down. Mine goes down to like 2v. It doesn't solve our problem but it tells me the stock radios somehow communicate with the CTM? which tells it to shut off acc. I Don't know for sure and neither does anyone else I talk to. I've been talking to metra and everything.

 

I've never had an issue with my aftermarket radio.

Yes the radio communicates on the module buss, but only for the steering wheel controls and diagnostics.

So does the radio not turn off automatically after you turn the key off? Or are you saying it turns off, but you can manually turn it back on if you press the standby/power button on it, with the key off?

Some radios can be powered on, they interpret that a manual command to turn on is equivalent to the red ignition trigger wire, and will draw main power from the yellow battery connection. I would not consider this abnormal.

If the radio does not turn off, or turns back on at it's own will, that is a different situation.

Where you are getting ~9-10 volts at, please measure from a valid 12V source to that positive wire. If the volt meter shows 2-3 volts, then the voltage loss is on the positive side of the circuit. Next, measure from the ground side of that circuit to a known ground. If it shows 2-3 volts, then the voltage loss is on the ground side of the circuit. Only 1 of these 2 cases should be true (or hypothetically, it could be 1-1.5 volts on both sides for 2-3 total).

Knowing where the voltage issue is coming from will tell us more.

 

On mine the radio stays on after turned off. When the key is off I have 9.9 volts on the acc/run circuit on fuse 19 to the combination flasher. This same voltage is also at the radio head acc/run wire. Radio and cable not in. All stock wiring. Don’t think it’s the radio at all.

when in acc/run there is 12 volts.

 

OK, so it's going to be helpful to do that multi-meter test and figure out if there is 3 volts lost on the front or back of the circuit. If there's a bad diode somewhere, that could represent some of the loss, as well as the backfeed.

I'm going to post these in reverse order of how they appear in the FSM (2001), and explain what is going on. Now, 2004 *could* be completely different. Unfortunately, I don't have access to an 04 FSM.





The red/white trigger wire in Position 6 of Connector 1 for the radio is sourced from Fuse 18 via Position 9 of Connector 9 of the Junction Block (driver side of dash). Fuse 18 is fed using the RUN-ACC A31 circuit.



Fuse 18 is fed through Position 1 of Connector 6 of the junction block, which goes to Position 9 of the electrical ignition switch. The RUN-ACC A31 circuit is thus a child of the BATT A1 circuit feeding the Electrical Ignition Switch.



Here, we see that RUN-ACC A31 is fed through the ignition switch from Fuse 10 in the underhood Power Distribution Center. Fuse 10 is fed from the BATT A0 connection.




How does this help us? Note that three fuses share the RUN-ACC A31 connection after the ignition switch. So we focus on backfed signal from those.



The cigar lighter and Combination Flasher are the other 2 devices on this power buss.



The cigar lighter is a passive device. It could not be backfeeding the voltage.



And here is the pinout for the Combination Flasher. Unfortunately, an internal diagram is not included with the FSM.

 

While it's entirely possible that something was changed in 2004, my main inclination would be that there is a failed transistor or diode in the combination flasher, and it is leaking just enough current (milli-amps) to turn on the aftermarket radio, but not the factory radio.

With that said, it's entirely possible that 2004 is when they switched to having the radio on until the door was opened - at which point the CTM may get involved in shutting the radio off....