I just got my car looked at and a DTC:28 error code came up.

A dodge RAM truck, that?
RHR means what?
all radios (most) have wire called, 12vdc memory wire,.
if that wire is cut broken shorted or fuse to it blown memory will be dead. it is that simple.
or installed wrong, did someone do that?, or is radio stock like it was 2011.? then is fuse blown.
RHR I think is Dodge real radio name best I can tell (vast radios exist)
Dodge (FCA) calls those fuses, IOD.
there is one for the radio too, day 1 new out the door
and the factory pulls them all , just before the cars ship to the dealer.
so the battery is not a wreak on deliver.
Iignition OFF , drains, is the name or as we ETs call it memory power. and is.
this wire on radios since 1970, first transistor car radios with station memory, so 50 years now same story ..
main power and ground, IN.
memory power In.
antenna power.>>>out.
speaker.>> out.

a scan toll will also show DTC error for and IOD fuse blown
amazing no?
or lost communications DTC errors making radio fail.(in odd ways)
newer cars the RADIO is married to the BCM
and if IOD blown or comms fail
radio can not save memory.

here is the SM quote on this car dodge RAM 2011
U0184-LOST COMMUNICATION WITH RADIO
For a complete wiring diagram, refer to the Wiring Information. When Monitored: Continuously when the ignition is on. Battery voltage between 10 and 16 volts. Ignition Off Draw (IOD) fused installed. Totally Integrated Power Module (TIPM) is configured correctly. Set Condition: Bus messages not received from the Radio for approximately two to five seconds. Diagnostic Test VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE Make sure the IOD fuse is installed and the battery is fully charged before proceeding. Turn the ignition on. With the scan tool, read the active DTCs. Is this DTC active? Yes (Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM)/Diagnosis and Testing)(Refer To List 1) and perform the U0184-87-Lost Communication with Radio - Missing Message diagnostic procedure. No (Refer to Non-DTC Diagnostics/Communication - Diagnosis and Testing)(Refer To List 2) and perform the Stored Lost Communication DTCs diagnostic procedure. List 1 28 - DTC-Based Diagnostics / MODULE, Totally Integrated Power (TIPM), DS/DJ/D2 - Pickup / Diagnosis and Testing 28 - DTC-Based Diagnostics / MODULE, Totally Integrated Power (TIPM), DD/DP - Chassis Cab / Diagnosis and Testing List 2 29 - Non-DTC Diagnostics / Communication, DS/DJ/D2 - Pickup / Diagnosis and Testing 29 - Non-DTC Diagnostics / Communication,...

as you and see , you can not fix modern cars lacking a scan too.
can not. (even 10 computer in the car) see this???????????

Is the check engine light on ? Any DTC'S - diagnostic trouble codes stored ? If any of these are true , light on or code's stored monitors will not set . Too set all monitors you do a drive cycle . A very specific way of driving your vehicle .

http://www.lyberty.com/car/drive-cycle.html

TYPE: OBD 1 Code 13 etc & read for hours

Could Type: 1989 Cadillac OBD 1 Codes

It's all there on the internet

Codes,Problems & Solutions--- dozens-- if not
hundreds of sites,forums,tech info,etc

the meaning of codes 41 and 58 is:

DTC - 41 Ignition control error

DTC - 41 MEM- CAL error
DTC - 41 Cam sensor sinal error

DTC - 58 Trans fluid temp sensor circuit error (low voltage)
DTC - 58 VATS System error

I hope this is helpful

No vacuum lines ,vent tubes .
Which transfer case ?
Transfer Case - NVG 233-NP1 (Two Speed Selectable)
Transfer Case - NVG 136-NP4(One Speed Automatic)

Encoder Motor not decoder motor ,an why did you replace it two times ?
open for suggestions ,yea take it to a qualified repair shop. Do you know what DTC'S - diagnostic trouble codes are ?
DTC C0300 Rear Speed Sensor Malfunction
DTC C0305 Front Speed Sensor Malfunction
DTC C0308 Motor A/B Circuit Low
DTC C0309 Motor A/B Circuit High
DTC C0310 Motor A/B Circuit Open
DTC C0315 Motor Ground Circuit Open
DTC C0374 General System Malfunction
DTC C0376 Front/Rear Shaft Speed Mismatch
DTC C0550 ECU Malfunction
DTC C0611 VIN Information Error
DTC C0895 Device Voltage Malfunction

O/D light blinks, but with that the check engine light is ON.--- This will make your troubleshooting easier.When the check engine light comes on, and remains on, this indicates that there is error stored in your cars computer.---- Once the computer is scanned, you will get error codes, as per that error code it will point towards faulty part, which is causing the O/D light to blink.-------- Most probably the O/D light blinks, If a problem exists in No. 1 or No. 2 solenoids or speed sensors .
--------------- For car after 1995 it requires OBD2 tool and for car before 1995 it requires OBD1 tool.------- --------- You car will require OBD1 tool.There are very few auto parts store and repair centers who have OBD1 tool.In your case you required OBD1 tool.------ You can just contact local auto-parts store and they will guide you to the nearest store who has OBD1 tool.There you can get your car scanned.If there is error set in your cars computer, then you will receive the error code.As per error code it will point towards the faulty part causing this problem in your car.------------- -------------- The codes which you get is scanning will be mostly any of this following codes:--- DTC P0500 - Vehicle Speed Sensor Malfunction
. DTC P0750 - Shift Solenoid "A" Malfunction
. DTC P0753 - Shift Solenoid "A" Electrical Malfunction
. DTC P0755 - Shift Solenoid "B" Malfunction
. DTC P0758 - Shift Solenoid "B" Electrical Malfunction
. DTC P0770 - Shift Solenoid "E" (SL) Malfunction
. DTC P0773 - Shift Solenoid "E" (SL) Electrical Malfunction
. DTC P1520 - Stop Light Switch Signal Malfunction
. DTC P1705 - Direct Clutch Speed Sensor Circuit Malfunction
. DTC P1765 - Shift Solenoid Valve SLN Circuit Malfunction
. DTC P1780 - Park/Neutral Position Switch Malfunction --------------- Now it all depends on what code you get, as per that you can replace the following part.------- This will help.Thanks.Helpmech.

Feb 7/11 - P0405

Jan 11/11 - P0336 - P0326

Dec 28/10 - P0217 - P0218 - P0163 - P0230 - P0231 - P0232

Dec 9/10 - Trouble Codes: P0170 - P0173 - P0162 - P0154 - P0142

Dec 6/10 - More DTC articles: P0157 - P0158 - P0160 - P0200

Nov 30/10 - DTC articles posted: P0505 - P0156

Nov 18/10 - More new articles: P0143 - P0144 - P0146 - P0147 - P0152

Nov 12/10 - P0120 - Throttle Position Sensor/Switch A Circuit Malfunction

Nov 11/10 - ECT Circuit Codes: P0116 - P0117

Nov 10/10 - P0111 - IAT Circuit Range/Performance Problem

Nov 7/10 - P0110 - Intake Air Temperature Circuit Malfunction

Nov 6/10 - P0108 - Manifold Absolute Pressure/Barometric Pressure Circuit High Input

Oct 21/10 - P0216 Injection Timing Control Circuit Malfunction

Sept 11/10 - Knock Sensor DTCs: P0327 P0332

Mar 15/10 - P0607 Control Module Performance Code

Mar 4/10 - P0606 PCM Processor Fault DTC

Feb 10/10 - New ECT Sensor article

Feb 9/10 - P0012 & P0022 - Camshaft Position - Timing Over-Retarded

Feb 2/10 - P0115 - Engine Coolant Temperature Circuit Malfunction DTC

Jan 19/10 - P0105 - MAP/Barometric Pressure Circuit Malfunction

DTC P1109 Secondary Port Throttle System

Did you get a subcode?
-0F Swirl Actuator Malfunction
-08 Swirl Actuator Supply Voltage Range/Performance
-05 Swirl Actuator Feedback Circuit High Voltage
-02 Swirl Actuator Feedback Circuit Low Voltage
-29 Swirl Actuator Feedback Signal Malfunction
-28 Swirl Actuator Feedback Signal Malfunction
-21 Swirl Actuator Feedback Signal Range/Performance
-54 Swirl Actuator Feedback Powerstage High Temperature

i dont have it but if you register at www.autozone.com you can get it for free and registering is free and they have all kinds of free help and diagrams for you

The C1214 error is related to the electronic brake traction control module (EBTCM) BPMV pump motor relay contact circuit open. Check the 40A ABS Maxifuse in the underhood electrical center. if blown change it, clear the DTC and if it blows again check for a short in the 1642 line or internal short in the BPMV.
When an ABS/TCS operation is required, the EBTCM activates the pump motor relay and battery power is provided to the pump motor. DTC errors are either H (history) or C (current) I usually clear the history and see if it sets again later.
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