2002 Dodge Ram ENGINE LIGHT ON/ ABS LIGHT ON / BRAKE LIGHT

TREDEW

MEMBER
2002 DODGE RAM
V8
4WD
AUTOMATIC
79,000 MILES

THE CHECK ENGINE LIGHT IS ON STEADY. AFTER I START MY TRUCK THE ABS LIGHT AND BRAKE LIGHT THEN COME ON. ALSO THE SPEEDO DOES NOT WORK PROPERLY (JUMPS ALL OVER THE PLACE). THE ODMETER SOMETIMES REGISTERS BUT MOSTLY NOT. ALSO THE TRUCK SEEMS TO HAVE TROUBLE SHIFTING. AFTER 30 SECONDS OR SO OF DRIVING THE POWER LOCKS KICK IN (NORMAL) BUT I CAN SEE THE SPEEDO JUMP UP ALL THE WAY UP THEN BACK DOWN. SEEMS TO BE SOME SORT OF GROUND PROBLEM JUST DON'T KNOW WHERE TO LOOK. THANKS IN ADVANCE.

3 Replies

MERLIN2021

MECHANIC
17,250 POSTS

You can try a self-diagnostic test. To activate self diagnostic program:

With the ignition switch in the OFF position, depress the TRIP and RESET buttons.
While holding the TRIP and RESET button turn the ignition switch to the ON position.
Continue to hold the TRIP and RESET buttons until the word CODE appears in the odometer windows (about five seconds ) then release the buttons. If a problem exists, the system will display Diagnostic Trouble Codes (DTC's). If no problem exists, the code 999 (End Test) will momentarily appear. Post all codes found, it sounds like the VSS(vehicle speed sensor).

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Saturday, May 9th, 2009 AT 9:14 AM

TREDEW

MEMBER
1 POST

I depressed the reset and step buttons (they are located on the overhead console) with the ign off then turned the key to on. The overhead console then displayed PASS. All conditions remained the same. I did not see anything happen in the odmeter window. It never came up with any code.

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Saturday, May 9th, 2009 AT 10:05 AM

MERLIN2021