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96 Mercury GM speedometer replacement

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Mercuryman96
User

Aug 24, 2011, 5:39 AM

Post #1 of 19 (6006 views)
  post locked   96 Mercury GM speedometer replacement  
I have a 1996 Mercury Grand Marquis, and the speedometer , and odometer both stopped working.
I took off dash cluster to find NO cable connection. I found sensor on transmission, and replaced it with new one, but it still
does not work. Can the new sensor be defective? Is there a certain way to slide the green gear part in?
Wher does the other end of speedometer cable connect to? Could it have fallen out?


nickwarner
Veteran / Moderator
nickwarner profile image

Aug 24, 2011, 7:16 AM

Post #2 of 19 (5985 views)
  post locked   Re: 96 Mercury GM speedometer replacement  
Instrument Cluster (Analog) (Part 1 Of 7) Your speedometer doesn't use a cable. They did away with that a long time ago. It uses a Hall Effect sensor that generates an AC pulse. You need to find out if it is getting power to the right places. From there you can determine if you have a bad instrument cluster or a wiring problem.


Mercuryman96
User

Aug 25, 2011, 9:22 AM

Post #3 of 19 (5972 views)
  post locked   Re: 96 Mercury GM speedometer replacement  
I picked up another cluster at the junk yard, and installed it today, but the speedomter, and odometer both still don't work.
What can I checked next. Where do the wires connect at the other end ? In the car, dash?


zmame
Veteran / Moderator
zmame profile image

Aug 25, 2011, 2:27 PM

Post #4 of 19 (5963 views)
  post locked   Re: 96 Mercury GM speedometer replacement  


Using a OHM meter check GY/BK for open. Check same circuit for short to ground. Check PK/O wire for proper grounding. If all that passes use a scope to test VSS output.. faster you got the higher the voltage should go.


(This post was edited by zmame on Aug 26, 2011, 5:19 PM)


Mercuryman96
User

Aug 26, 2011, 4:49 AM

Post #5 of 19 (5950 views)
  post locked   Re: 96 Mercury GM speedometer replacement  
In Reply To


Using a OHM meter check GY/BK for open. Check same circuit for short to ground. Check PK/O wire for proper grounding. If all that passes use a scope to test VSS output.. faster you got the higher the voltage should go.
Where is the circuit located???


(This post was edited by zmame on Aug 26, 2011, 5:19 PM)


zmame
Veteran / Moderator
zmame profile image

Aug 26, 2011, 9:05 AM

Post #6 of 19 (5936 views)
  post locked   Re: 96 Mercury GM speedometer replacement  
GY/BK goes from cluster to the speed sensor and the just test for ground on the PK/O wire.. use a ohm meter from body ground to PK/O wire to see what the resistance is should be 0 or close to it.


Mercuryman96
User

Aug 26, 2011, 10:07 PM

Post #7 of 19 (5921 views)
  post locked   Re: 96 Mercury GM speedometer replacement  
I don't have any testers ,light meters,or fancy gadgets. I just want to replace the computer that
the speedometer sensor runs off. I didn't find it behind the kick panel on the passenger side.
Can someone tell me where it is, and maybe a photo of the unit. I am going up the junk yard to pick one up.
I don't want to be Eddy the Electrician. I want to replace the computer not repair. Thanks.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 27, 2011, 3:10 AM

Post #8 of 19 (5916 views)
  post locked   Re: 96 Mercury GM speedometer replacement  
Quote
I don't have any testers ,light meters,or fancy gadgets. I just want to replace the computer that
the speedometer sensor runs off.
Then, what do you do after throwing $1000 worth of parts at it and you still have the same problem?



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Mercuryman96
User

Aug 27, 2011, 7:14 AM

Post #9 of 19 (5911 views)
  post locked   Re: 96 Mercury GM speedometer replacement  
In Reply To
Quote
I don't have any testers ,light meters,or fancy gadgets. I just want to replace the computer that
the speedometer sensor runs off.
Then, what do you do after throwing $1000 worth of parts at it and you still have the same problem?
If I had that kind of money , I would but a newer car. I paid $19 for the new sensor,and 2 bucks for junk yard entrance
and $5 bucks for center cluster out of dash. The computer will cost me another $10 bucks.
I been going to this junk yard for over 35 years ,and get parts that go for $250 - $300 at dealers for $5 -$20 bucks at junk yard.
I want to replace , cause its so much easier then searching through lots of wires.
Where is computer located? Thanks


zmame
Veteran / Moderator
zmame profile image

Aug 27, 2011, 10:02 AM

Post #10 of 19 (5901 views)
  post locked   Re: 96 Mercury GM speedometer replacement  
There is no computer that the VSS goes through.. It's wired right to the cluster, so the "computer" would be the cluster.


Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Aug 27, 2011, 10:09 AM

Post #11 of 19 (5900 views)
  post locked   Re: 96 Mercury GM speedometer replacement  
 
Quote
I want to replace , cause its so much easier then searching through lots of wires.
What happens if the problem is in the wiring? Are you going to call "Eddy the Electrician" ?





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.


Mercuryman96
User

Aug 27, 2011, 12:06 PM

Post #12 of 19 (5890 views)
  post locked   Re: 96 Mercury GM speedometer replacement  
In Reply To
There is no computer that the VSS goes through.. It's wired right to the cluster, so the "computer" would be the cluster.
I changed the cluster already. I will follow the wires, and if no problem , then I will wait until I take the whole dash apart when I replace the heater core in 2 weeks. Thanks.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 27, 2011, 12:09 PM

Post #13 of 19 (5887 views)
  post locked   Re: 96 Mercury GM speedometer replacement  
Quote
I changed the cluster already. I will follow the wires, and if no problem , then I will wait until I take the whole dash apart when I replace the heater core in 2 weeks.
And you still won't know what is wrong with it using that approach.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



zmame
Veteran / Moderator
zmame profile image

Aug 27, 2011, 10:04 PM

Post #14 of 19 (5873 views)
  post locked   Re: 96 Mercury GM speedometer replacement  
You'll honestly be furter ahead to get it diag properly. It has to be wiring you've replaced the sensor and the cluter only thing left is 2 connectors and wires.

Need to figure out where in the circuit the fault is, check for pin drag(making sure pins are making proper contact) and fix the damage or run a overlay(new wire).


(This post was edited by zmame on Aug 27, 2011, 10:06 PM)


Mercuryman96
User

Aug 28, 2011, 3:54 AM

Post #15 of 19 (5870 views)
  post locked   Re: 96 Mercury GM speedometer replacement  
In Reply To
You'll honestly be furter ahead to get it diag properly. It has to be wiring you've replaced the sensor and the cluter only thing left is 2 connectors and wires.

Need to figure out where in the circuit the fault is, check for pin drag(making sure pins are making proper contact) and fix the damage or run a overlay(new wire).
There are 2 connector pins on the back of the cluster. Would they both have something to do with the speedometer, or only one?


zmame
Veteran / Moderator
zmame profile image

Aug 28, 2011, 6:47 AM

Post #16 of 19 (5856 views)
  post locked   Re: 96 Mercury GM speedometer replacement  


PIN 16


Mercuryman96
User

Aug 28, 2011, 7:02 AM

Post #17 of 19 (5854 views)
  post locked   Re: 96 Mercury GM speedometer replacement  
In Reply To


PIN 16 OK I will check pin # 16 tommorow after Irene leaves town. Thanks

(This post was edited by zmame on Aug 28, 2011, 7:04 AM)


mercuryman
User

Jun 3, 2014, 1:04 AM

Post #18 of 19 (3774 views)
  post locked   Re: 96 Mercury GM speedometer replacement  
In Reply To
You'll honestly be furter ahead to get it diag properly. It has to be wiring you've replaced the sensor and the cluter only thing left is 2 connectors and wires.

Need to figure out where in the circuit the fault is, check for pin drag(making sure pins are making proper contact) and fix the damage or run a overlay(new wire).

Does the VSS cable that connects to the transmission go under the hood, and through the firewall into the cluster.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 3, 2014, 4:42 AM

Post #19 of 19 (3756 views)
  post locked   Re: 96 Mercury GM speedometer replacement  
I won't tell you again.

Stop duplicating questions in different threads. This thread has been dead for 3 years.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.






 
 
 






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