Those three could be related, or they may not be. The first thing you need to do is hook a scan tool up and read the codes. Once i know the codes, i can tell you what to test. A bad speedo sensor could cause it all, but most likely the truck would be shifting funny also.
When you've got warning light, there are trouble codes stored in the computer. Getting the codes read is the first step in diagnosing a problem
SOURCE: Speedometer not working
speedometer get speed signal from ABS. ABS and DSC are two functionality in same ECU.
You shall read faults from ABS/DSC ECU.
Most frequently, there are problems with speed sensors on wheels.
With ignition on, you shall measure voltage on both wires (- pole of voltmeter shall be connected on vehicle ground). You will see one sensor without voltage supply. This will sensor with problem. you can, for check, change sensors on same axle (left and right).
Switch ignition off, and on.
If voltage supply missing will go on another side (with faulty sensor), you will be sure that is problem is sensor.
SOURCE: Brake? Problem with 01 Saab 9.3
to begin i dont know what it means to say expensive or not how ever, all the lights at the same time could only mean one thing the problem could be in one of the diodes in your alternator is bad thus turning on all the lights on the dash board,
now regarding your brakes especially on saab;s shake or vibration is caused by uneven surface on the brake rotors (usualy the front) my suggestion is to replace the front rotors and the brake pads at the same time.
SOURCE: Speedometer, RPM, ABS, and Brake light
It's not the fuse. You need to jump start the diagnostic cable. First you need a battery of 9v and short the + and - terminal to the diagnostic cable. Then you will see smoke. After that it should work fine.
SOURCE: abs light is on? 2004 chevy avalanche
what i've seen with the k series chevrolet trucks is that the wheel speed sensors develop corrosion where the sensor mounts to the hub. you can start by taking the sensor out and cleaning off the mounting surface with a wire brush. the process is:
1. raise front of vehicle onto jackstands
2. remove front wheels
3. remove the brake caliper, bracket and rotor on both sides
4. remove wheel speed sensor via 1 torx bolt (be carefull as the corrosion will cause the sensor to "stick" in the hole)
5. clean the mating surfaces with a wire brush so the sensor bolt hole and mounting surface on the hub is shiney again.
6. if you can, pick up a can of rust preventing primer and spray a little on the surfaces to prevent further corrosion
7. let paint dry
8. apply a thin fil, of grease to the sensor and the sensor mounting spot on the hub
9. re-install sensor
10. revers steps 3-1 for re-installation.
*process is the same for both sides.
this was a common problem on the k series trucks.
while your in there it wouldn't be a bad idea to check the sensors wires to make sure they arent broken. let me know if the repair works for you
SOURCE: 2002 chevrolet avalanche abs light on
Hello, I see you are having abs problems. The electronic brake control module has shorted out internally keeping the anti lock brake motor running. You will want to take your vehicle to a certified dealer for this repair, because this module may or may not have to be programmed to your specific model. Please rate this answer, Thank you
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