How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Chris (aka- Moose) Your Own Question
Chris (aka- Moose)
Chris (aka- Moose), Mercury Technician
Category: Mercury
Satisfied Customers: 1934
Experience:  16 years experience with Mercury
2499435
Type Your Mercury Question Here...
Chris (aka- Moose) is online now
A new question is answered every 9 seconds

SPEEDOMETER STOPPED WORKING, SOMEONE TOLD ME IT COULD BE THE

Customer Question

SPEEDOMETER STOPPED WORKING, SOMEONE TOLD ME IT COULD BE THE "INSTRUMENT INTERFACE MODULE". I CAN NOT SEEM TO FIND ANYTHING OUT ABOUT THIS PART?
JA: What is the model/year of your Mercury?
Customer: 1999 MERCURY COUGAR 2.5 V6 ENGINE AUTOMATIC TRANSMISSION
JA: How many miles are on the car? Is it the original transmission?
Customer: ORIGINAL TRANS AND 89,5599
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: SORRY ADDED AN EXTRA 9. MY MECHANIC IS STUMPED HE CANT FIND ANYTHING ON THE PART EITHER
JA: Anything else you think the mechanic should know?
Customer: THE SPEEDO STOPPED THE THE CAR RAN ROUGH, MY MECHANIC CHANGED THE MODULE ON THE TRANS AND THAT FIXED THAT BUT THE SPEEDO STILL IS OUT. HE SAID ITS A SEPERATE PROBLEM.
Submitted: 7 months ago.
Category: Mercury
Expert:  HDGENE replied 7 months ago.

Hello i dont quite understand. The speedometer stopped working. You had the vehicle speed sensor replaced on the transmission and its working but its not working?

Customer: replied 7 months ago.
The Trans straightend out after the SSM was changed, it had been acting up not changing gears. But the speedometer stopped showing speed when the Trans first acted up but even after the SSM module was replaced it did not work.
My mechanic said it was a separate problem. It was the instrument cluster interface module.
Expert:  HDGENE replied 7 months ago.

Ok you keep saying SSM do you mean he replaced the vehicle speed sensor on the transmission? The speedometer has not worked regardless of this repair. It didnt work before and it doesnt work now? What diagnostic trouble codes are stored?