No speedometer gas gauge and no tach - 1999 Plymouth Voyager

Hello crabass.

I see this issue happen often and it can be caused from a couple different ways.
The first thing to try is a battery disconnect. I have seen where rebooting the system is enough to get things going again.
If that doesn't help, verify all the fuses in the under hood integrated power/fuse module are good and corrosion free. Pull each one out and look at the connector tabs to make sure they are clean.
The power modules in these vans are exposed to environment and are susceptible to corrosion and sometimes is not visible without pulling them apart(very difficult to do). There is a circuit board inside them and are not well sealed. If corrosion has gotten to the board the module will need to be replaced.
Although I have heard of some guys having to replace body control modules I have not had to in my shop as yet in a Caravan.

There are a few possible issues that have happened at my shop, hopefully it helps you along to a repair.
Thank you for using FixYa.
KL