i have a 98 dodge ram 1500 and just out of the blue my cluster does not work anymore and i was wondering if any of you guys had this problem before . i checked all the fuses and they are all good any help would be great. thanks tony

 

Does your odometer read, no bus?

 

no just blinking the last miles

 

How to put the instrument cluster into self-test:

(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) Keep the odometer/trip odometer switch button
depressed for about ten seconds, until CHEC
appears in the odometer display, then release the
odometer/trip odometer switch button.

(5) A series of three-digit numeric failure messages
may appear in the odometer display, depending upon
the failure mode. If a failure message appears, refer
to the Instrument Cluster Failure Message chart for
the description and proper correction. If no failure
message appears, the actuator test will proceed as
described in Step 6.

(6) The instrument cluster will begin the Vacuum
Fluorescent Display (VFD) walking segment test.
This test will require the operator to visually inspect
each VFD segment as it is displayed to determine a
pass or fail condition. First, all of the segments will
be illuminated at once; then, each individual segment
of the VFD will be illuminated in sequence. If any
segment in the display fails to illuminate, repeat the
test to confirm the failure. If the failure is confirmed,
replace the faulty instrument cluster. Following completion
of the VFD walking segment test, the actuator
test will proceed as described in Step 7.

(7) The instrument cluster will perform a bulb
check of each indicator that the instrument cluster
circuitry controls. If the wait-to-start indicator does
not illuminate during this test, the instrument cluster
should be removed. However, check that the
incandescent bulb is not faulty and that the bulb
holder is properly installed on the instrument cluster
electronic circuit board before considering instrument
cluster replacement. If the bulb and bulb holder
check OK, replace the faulty instrument cluster.
Each of the remaining instrument cluster circuitry
controlled indicators except the cruise indicator are
illuminated by a Light Emitting Diode (LED). If an
LED or the cruise indicator in the VFD, fails to illuminate
during this test, the instrument cluster must
be replaced. Following the bulb check test, the actuator
test will proceed as described in Step 8.

(8) The instrument cluster will perform a gauge
actuator test. In this test the instrument cluster circuitry
positions each of the gauge needles at three
different calibration points, then returns the gauge
needles to their relaxed positions. If an individual
gauge does not respond properly, or does not respond
at all during the gauge actuator test, the instrument
cluster should be removed. However, check that the
gauge terminal pins are properly inserted through
the spring-clip terminal pin receptacles on the instrument
cluster electronic circuit board before considering
instrument cluster replacement. If the gauge
terminal connections are OK, replace the faulty
instrument cluster.

(9) 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 on the CCD data bus during
the test.

(10) Go back to Step 1 to repeat the test, if
required.

 

thank you

 

o k i got codes 900 920 921 940 950 999 anybody know what to do from here. someone told me a wire rubs thru and i heard to get my pcm reflashed. i am confused?

 

Error codes:


[IMG]local://upfiles/39331/069609559E30462790C687AF8F1B194E.jpg[/IMG]

 

when i finished part of my plenum repair i wanted to start it up and make sure what i had so far was working. mine blinked the odometer on/off and then eventually said 'no bus'. i had left off one of the ground wires from the top of the accy bracket, next to the ps pump. might be worthwhile to loosen, clean, and retighten that

 

thanks i will check so maybe a loose ground too, you guys are great . i hope its some thing easy but its always hard for me