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1998 Dodge Caravan Speedometer Has a second connector attached with a white pigtail. What is that used for and will it operate without it?
Is your Speedometer working? It's possible a speed sensor is bad causing the Computers to go into LIMP mode.
Most likely speedometer cable
Probably the speed sensor on the transmission.
Depends on what's wrong with the speedometer. Try re-soldering the contacts on the mainboard behind the instrument panel.
the speed sensor.
Dodge Stealths were notorious for being expensive to fix. Many or most of the parts were specially made for the model.
You can fix the speedometer in your 1994 Oldsmobile 98 by replacing the speedometer cable. If changing the speedometer cable does not fix your speedometer you will need to replace the entire speedometer.
buy a new one and wire it up with a soldering iron
Most common would be speedometer cable has broken Remove speedometer head and move vehicle to see if cable moves- if not probably broken - if it does probably problem with speedometer head
go and get some instance seal at autoparts store it should be a good cheap fix
Check the fuses. Sometimes you have to remove and reinstall them.