I have an 88 as well and my light was on for the longest time but since the 88 model has what they call an EMR module (Emissions Maint. Reminder) located below the headlight on the back of the instrument panel. So there is a little whole on the module that you can just push a screwdrive or something of that sort into the whole to reset the light.
aperantly take the light out
To reset the maintenance required warning light on a 1989 Dodge Dakota, unhook the battery connector cables for 10 minutes. Reconnect them and start the vehicle.
That requires a scan tool.
The maintenance light,You will need to take it to a Dodge dealer to reset it. Or get a DBR-2 code scanner.BIG $$$
What do the REQD light mean on my dashboard of my 1993 Dodge Dakota 3.9L Truck
Take the bulb out
If it's anything like my Dodge Dakota, the maintenance required light is to inform you that the emissions system is due for an inspection. Some earlier models had a button behind instrument cluster to reset it, but I've been told that on my 89 Dakota it requires a trip to the dealer. It doesn't indicate a problem, just a cruel trick to make you visit the dealer! I just took the bulb out of mine.
A scan tool is required.A scan tool is required.
it means when the maintenance light is on
Turn the key on, with the engine off, and press the gas pedal 3 times.
To reset the maintenance required light on a 1989 Dodge D50, disconnect the battery. Leave it disconnected for 10 minutes before reconnecting it.
The Maintenance Required Light is not the same as the Check Engine Light. The Maintenance Required Light is telling you that there is scheduled maintenance that needs to be performed. It may mean it needs an oil/filter change. To find out what needs to be done look at the maintenance schedule in your owner's manual.