QuestionThe speedometer on my '91 LeSabre stopped working. I have changed the speed sensor and have tried 4 instrument cluster replacements (all parts from junk yard cars). Still does not work. I have been told that the computer is getting a signal from the sensor but the cluster is not getting a signal from the computer. HELP!
AnswerNEVER EVER purchase and install JUNK YARD parts. Especially electronic parts. You have no way to tell if the part is faulty when you but it and if it IS, It can destroy other components within your vehicles electronics.
There is a test procedure that you can do to determine if the problem is either the:
1. Speed sensor.
2. A problem with the gear on the transmission output shaft.
3. A wiring problem from the speed sensor to the computer.
4. A wiring problem from the computer to the cluster.
5. A faulty cluster.
Your problem could also be a bad brand new speed sensor of which is WHY you do the tests FIRST.
Now you have to test the speed sensor, The wiring to the computer, the computer, the wiring from the computer to the cluster and finally the cluster.
Hopefuuly those junk yard clusters did not have other problems that may have damaged other components and instead of just no speedometer you may now have other cluster gage problems due to a possible faulty junk yard cluster.
You need an electrical schematuic and the diagnostic procedures in order to TEST the system.
I can provide the testing information, However, You will need to contact me at:
onlineautohelp@msn.com
In order for me to provide you pictures and procedures to fix your problem.
NOTE: This website is NOT mine and I am only a VOLUNTEER helping answer BASIC simple questions to those in need and this website does not allow pictures to be sent and or received.
Please include all of the information, MAKE, YEAR, MODEL, Engine size, transmission type and all necessary other information that you previously provided as well as the information that I just gave you when you contact me.
autohelp
