4wd indicator lamp

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Old 10-03-10, 05:59 PM
dam
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4wd indicator lamp

I have a '04 dodge ram. It goes into 4wd fine but the indicator lamp doesn't light up so I have to go by feel. Is there something I can check? Is there a sensor on the transfer case? Thanks ,Alan
 
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Old 10-05-10, 04:15 PM
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If you have a owners manual I would check that first. If not, check the fuses and see if something is blown... if not, it could just be the indicator light has blown.

-Ken
 
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Old 10-05-10, 05:45 PM
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Are you 100% sure everything is alright? Is your 4wd electronic or manual? If manual it is operated off vacuum and the vacuum line may be damaged. But it won't engage at all if that is the case, and that is why I asked if you were sure it is OK.
 
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Old 10-06-10, 03:30 AM
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The indicator is meant to come on (as a bulb check) when the ignition is turned to (on), and could remain (on) for (up to three seconds), once the engine is running. Is it doing that?
 
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Old 10-09-10, 10:17 AM
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Originally Posted by ASE MASTER View Post
The indicator is meant to come on (as a bulb check) when the ignition is turned to (on), and could remain (on) for (up to three seconds), once the engine is running. Is it doing that?
no it does not. Does it have to be in 4wd or will it do a bulb check anyway.
 
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Old 10-09-10, 01:34 PM
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(Question) Does it have to be in 4wd or will it do a bulb check anyway.

No. bulb test means just that. It's a test for the bulb. Regardless of what mode (drive) you're in, when you start the truck the bulb should light. Rule out a burned out bulb.
 
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Old 10-09-10, 05:44 PM
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So it doesn't come on during that first turn of the key,so the bulb must be burned out. what tells the bulb to come on when you put it in 4wd?
 
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Old 10-09-10, 06:08 PM
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(Quote) So it doesn't come on during that first turn of the key,

(Quote) so the bulb must be burned out.

(Quote) what tells the bulb to come on when you put it in 4wd?


dam,

Your above quotes speak for themselves. Furthermore not only do you ask the question, but you answer it as well.

What do you think buddy? Think it might make sense to address the obvious first?

Let's not complicate a simple process here.

Change the bulb.

Post the results.
 
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Old 10-09-10, 06:36 PM
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Just for giggles.....This same situation ate my lunch today...

There is no actual bulb check routine. The Transfer case controller communicates over a network, and the instrument cluster interprets this by displaying the appropriat indicator. No communication on the network, no Indicator. (Instrument cluster selftest proved bulb to be Operational).

The vehicle I was working with had a communication issue, although it still functioned normally.

Since its faster and cheaper, Yes by all means , replace the bulb and try again. Just keep in mind, Further and more involved troubleshooting may lie ahead.

1500, 2500, or 3500...???? Gas or Diesel???...I'll grab the self test procedures for you.
 
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Old 10-09-10, 06:45 PM
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Successful completion of the actuator test will confirm that the instrument cluster is operational. However, there may still be a problem with the PCI data bus, the Powertrain Control Module (PCM), the Engine Control Module (ECM), the Front Control Module (FCM), the Transmission Control Module (TCM), the Transfer Case Control Module (TCCM), the Airbag Control Module (ACM), the Controller Anti-lock Brake (CAB), or the inputs to one of these electronic control modules. Use a DRBIII® scan tool to diagnose these components. Refer to the appropriate diagnostic information.
  1. Begin the test with the ignition switch in the Off position.
  2. Depress the odometer/trip odometer switch button.
  3. While still holding the odometer/trip odometer switch button depressed, turn the ignition switch to the On position, but do not start the engine.
  4. Release the odometer/trip odometer switch button.
  5. The instrument cluster will simultaneously illuminate all of the operational segments in both VFD units, perform a bulb check of each operational LED indicator. The VFD segments and LED indicators remain illuminated as each gauge needle is swept to several calibration points and back. If a VFD segment or an LED indicator fails to illuminate, or if a gauge needle fails to sweep through the calibration points and back during this test, the instrument cluster must be replaced. Following these tests, the actuator test will proceed as described in Step 6.
  6. The text “C Code” is displayed in the odometer VFD for about three seconds. If there is no stored fault information, the display will show two pairs of zeroes in the format “00” “00”, which indicate that the display of fault information is done. If there is stored fault information, two sets of two-digit alpha and alpha-numeric fault codes will appear in the odometer display for a three second interval. The first pair of digits represents a Diagnostic Trouble Code (DTC), or fault code for the instrument cluster. The second pair of digits is a counter for the number of ignition key cycles that have occurred since the displayed DTC was set. The instrument cluster will continue to display additional sets of two pairs of digits at three second intervals until all of the stored codes have been displayed, which is again signaled by a code of “00” “00”. Refer to the Instrument Cluster Failure Message table for a description of each fault code that the instrument cluster displays. If an instrument cluster fault is displayed, use a DRBIII® scan tool to diagnose the problem. Refer to the appropriate diagnostic information. INSTRUMENT CLUSTER FAILURE MESSAGE Fault Code Description Correction 01 Airbag warning indicator output circuit shorted. Refer to the appropriate diagnostic information. 02 Airbag warning indicator output circuit open. Refer to the appropriate diagnostic information. 03 ABS indicator output circuit shorted. Refer to the appropriate diagnostic information. 04 ABS indicator output circuit open. Refer to the appropriate diagnostic information. 05 MIL indicator output circuit shorted. Refer to the appropriate diagnostic information. 06 MIL indicator output circuit open. Refer to the appropriate diagnostic information. 07 Wait to start indicator circuit shorted. Refer to the appropriate diagnostic information. 08 Wait to start indicator circuit open. Refer to the appropriate diagnostic information. 0B BTSI output circuit shorted or open. Refer to the appropriate diagnostic information. 22 Headlamp switch input circuit shorted. Refer to the appropriate diagnostic information. 23 Headlamp switch input circuit open. Refer to the appropriate diagnostic information. 24 Turn hazard switch input circuit shorted. Refer to the appropriate diagnostic information. 25 Turn hazard swiitch inpot circuit open. Refer to the appropriate diagnostic information. 27 Courtesy/dome output circuit shorted or open. Refer to the appropriate diagnostic information. 28 Glovebox/map lamp output circuit shorted or open. Refer to the appropriate diagnostic information. 29 Cargo lamp output circuit shorted or open. Refer to the appropriate diagnostic information. 40 Wiper switch input circuit shorted. Refer to the appropriate diagnostic information. 41 Wiper switch input circuit open. Refer to the appropriate diagnostic information. 42 Wash/beam input circuit shorted. Refer to the appropriate diagnostic information. 60 Passenger door lock switch input circuit shorted. Refer to the appropriate diagnostic information. 61 Passenger door lock switch input circuit open. Refer to the appropriate diagnostic information. 62 Passenger door lock switch input circuit stuck. Refer to the appropriate diagnostic information. 63 Driver door lock switch input circuit shorted. Refer to the appropriate diagnostic information. 64 Driver door lock switch input circuit open. Refer to the appropriate diagnostic information. 65 Driver door lock switch input circuit stuck. Refer to the appropriate diagnostic information. 66 All door lock output circuit shorted to ground or voltage. Refer to the appropriate diagnostic information. 67 All door unlock output circuit shorted to ground or voltage. Refer to the appropriate diagnostic information. 68 Driver door unlock output circuit shorted to ground or voltage. Refer to the appropriate diagnostic information. 6C Driver cylinder lock switch input circuit shorted. Refer to the appropriate diagnostic information. 6E Driver cylinder lock switch input circuit stuck. Refer to the appropriate diagnostic information. 80 Incorrect odometer value found. Refer to the appropriate diagnostic information. 81 Remote radio switch input circuit high. Refer to the appropriate diagnostic information. 82 Remote radio switch stuck. Refer to the appropriate diagnostic information. A0 Internal module FLASH memory checksum failure. Refer to the appropriate diagnostic information. A1 Internal module bootloader failure. Refer to the appropriate diagnostic information. A3 Battery voltage open. Refer to the appropriate diagnostic information. A5 TCCM messages not received. Refer to the appropriate diagnostic information. A7 VIN checksum error. Refer to the appropriate diagnostic information. A8 VIN previously stored. Refer to the appropriate diagnostic information. A9 PCI bus internal failure. Refer to the appropriate diagnostic information. AA PCM messages not received. Refer to the appropriate diagnostic information. AB TCM messages not received. Refer to the appropriate diagnostic information. AC ABS messages not received. Refer to the appropriate diagnostic information. AD FCM messages not received. Refer to the appropriate diagnostic information. AE ACM messages not received. Refer to the appropriate diagnostic information. AF SKIM messages not received. Refer to the appropriate diagnostic information. B0 RKE fob batteries low. Refer to the appropriate diagnostic information. B1 RKE module communication link. Refer to the appropriate diagnostic information. 00 Done All Diagnostic Trouble Codes (DTC) have been displayed.
  7. The actuator test is now completed. The instrument cluster will automatically exit the self-diagnostic mode and return to normal operation at the completion of the test, if the ignition switch is turned to the Off position during the test, or if a vehicle speed message indicating that the vehicle is moving is received from the PCM over the PCI data bus during the test.
  8. Go back to Step 1 to repeat the test, if necessary.

DOES YOUR 4WD LAMP LIGHT UP DURING SELF TEST?????
 
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