I have a 99 dodge neon that i bought for very cheap. the speedometer does not work nor does the odometer. so i was going to replace the vehicle speed sensor having checked the instrument panel and seeing it was ok. when i began to inspect the speed sensor i found that there had been a short and the 3 wires running from the speed sensor had melteded together i tried to pull them back and separate them to run new wire but one wire was so shorted it completely disenagrated and i cannot find it within the harness. so i guess my question is this how can i re wire the the speed sensor straight from the source? trying to read the wiring diagram in a chiltons makes no sense cause all the wires splice and run to other sensors and things. any help is greatly appreciated.

Question edited for clarity.
Question moved to model category.

It appears to be a known issue.

Speedometer/odometer in 1992 Ram B250 not working

DodgeForum.com https://dodgeforum.com > ... > Dodge Ram Van
Jan 1, 2013 - I recently bought a 1992 Ram B250 cargo van and the speedometer/odometer won't work. I went to the junk yard and replaced the instrument ...

speedometer and odometer don't work - DodgeForum.com
Jan 5, 2011
1992 B250 Van Speedometer is Crazy - DodgeForum.com
May 30, 2011
Odometer issue - DodgeForum.com
Dec 10, 2017
Odometer - DodgeForum.com
Jan 29, 2011
More results from dodgeforum.com

Dodge B250 Speedometer Is Not Working

RepairPal.com https://repairpal.com > dodge > speedometer-not-work...
The most common reasons a Dodge B250 speedometer isn't working are the vehicle speed sensor (VSS), a faulty speedometer, or an electrical issue.

Q&A: 1994 Dodge Ram Van B250 Speedometer Not Working

JustAnswer https://www.justanswer.com > Dodge Repair
Apr 22, 2009 - You will need to check to make sure that the sensor is turning.if you jack the back of the van up and remove the sensor.put it in gear and ...

1 answer · Top answer: This sounds like the speedometer drive gear in the trans is loose.you will need to take the ...

SOLVED: I have 1992 dodge B250 van the speedometer is

Fixya https://www.fixya.com > ... > 1988 Dodge B250
Feb 22, 2011 - If the speedometer is working but the counter is not - then the counter gear is broken. it is not worth trying to fix -- just buy a new ...

I HAVE A 1992 DODGE B250 VAN AND I CAN'T GET ... - Fixya
Jan 10, 2009
Troubleshoot speedometer failure 1992 dodge ram b250 - Fixya
Oct 18, 2023
Speedometer quits working in my 1992 dodge conversion van
Mar 11, 2009
The oddometer works but the speedometer doesn't in - Dodge
Jun 9, 2009
More results from www.fixya.com
..

Speedometer
The instrument panel cluster (IPC) displays the vehicle speed based on the information from the body control module (BCM). The engine control module (ECM) calculates the vehicle speed based on the controller area network (CAN) serial data message indicating the wheel reference speed from the electronic brake control module (EBCM). The ECM sends a CAN serial data message to the BCM indicating the vehicle speed. The BCM sends a class 2 message to the IPC indicating the vehicle speed.
The speedometer defaults to 0 km/h (0 mph) when any of the following occur:
• The EBCM detects a malfunction in the vehicle speed sensor circuit.
• The ECM detects a loss of CAN communications with the EBCM.
• The BCM detects a loss of CAN communications with the ECM.
• The IPC detects a loss of class 2 communications with the BCM.

Having the vehicle scanned for codes would probably point you in a correct diagnostic direction .

VSS - vehicle speed sensor more then likely .

Speed odometer repair 2000 Dodge neonES

input and out put speed sensors tell the TCM and the ECM the difference between engine rpms and transmission input roms so that the correct gear ratio can be selected
A speedo sensor reads the out put shaft (drive line ) shaft and refers to road speed for speed and odometer readings and to calculate the fuel consumption rate
it is possible that you have replaced the wrong sensor
Talk with an accredited transmission specialist shop and have the problem diagnosed

i believe it has a vehicle speed sensor in the rear diff that is probably your problem as the sensor you replaced in the transmission was probably the output shaft speed sensor

Sure, it's probably just a loose or broken speedo cable, it runs from the transmission to the firewall. A mechanic can fix it in minutes.

Need to access the PCM with a scan tool and see if the vehicle speed sensor is still working. If it is, the problem is most likely in the instrument cluster and a junkyard part would be a good solution. If you have no VSS operation, that's your problem.

The speedometer is driven by the computer which uses the Vehicle Speed Sensor, which is located on the transmission, to determine how fast the vehicle is traveling. It is not uncommon for the VSS to go out unexpectedly, usually the check engine light will come on when it malfunctions, and the computer will lock the transmission in 2nd gear, which will allow you to limp the car in to a repair shop.

I have a 99 accord and my speedometer and odometer did not work. The problem was the VSS vehicle speed sensor. The VSS is located on the transmission. Once I replaced it everything worked fine.