My 1994 Honda Accord Speedometer not reading the mph or rpm. All of the other gages work except the one that measures the speed. I already opened the dash and all of the cables are connected properly.

The speed sensor is malfunctioning on the transmission.I would not fix it as a result of the age of the car.Simply use a GPS for a more accurate speed

Sounds like the Vehicle Speed Sensor. It is strange that you're not getting a Check Engine Light or a Flashing light on your gauges where the gear selection indicator bulbs are. For the heck of it, check the plug and wires leading to the Speed Sensor. It is on the back of your transmission kind of near/above the firewall motor mount if you need to replace it. Good luck!

could be speed sensor. the light is on because the trans doenst know the vehicle speed.

replace temperature gauge and insprct/replace speedometer/rpm cable

Your instrument is bad, The spiral coil for the needle is alraedy out ot calibration therefore it has been jumping around. Even they reset, it already been stretching. It needs a new one.
Don't waste mony for the reset.
It is probebly expensive from dealer plus labor. Just to check out the price,
You can get a used one from ebay for $85. However, you need to know how to replace it. Let me know it you need any help.
Meanwhile you can gauge your RPM to keep your speed under control on the long trip.For example: 2000 rpm is about 55 mph. Try to keep it below 3000 rpm so you don't get over speed limit.

sounds like vehicle speed sensor i had to replace instrument cluster on my civic

Seem like you need to have at-least the two front tires high speed balanced. This shaking at high speed is most likely due to the tire being out of balanced. Good luck and thanks for using FIX YA

replace your speed sensor

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.

Matt , It is the vss sensor