To address what you *think* is a maintenance light, you need to identify *which* light is on.
* Oil Change Light: This is the most common "maintenance" indicator on older vehicles. This light will require you to reset it *after* changing the oil. On most 1990 Dodge Grand Caravans, this is done by briefly pressing and holding the oil pressure gauge switch after starting the vehicle. This often involves some jiggling and experimenting. The process may vary, and you may need to consult your owner's manual (if you have one) to find the specific instructions. It often involves turning the key to the "on" position (without starting the engine), then finding the proper switch for the oil pressure.
* Other Lights: If it's a different light (like a check engine light – usually a small engine symbol – it will *not* reset itself. A check engine light indicates a problem that needs to be diagnosed using a scan tool, and only then can it be potentially reset. Simply resetting it won't fix the underlying issue.
Important Considerations:
* Owner's Manual: The absolute best resource is your vehicle's owner's manual. It should have information specific to your Grand Caravan.
* Year Variation: Even within the 1990 model year, there might be slight variations in the system depending on the trim level and options.
* Professional Help: If you can't find the information, take your vehicle to a trusted mechanic. They can quickly identify the light, determine what maintenance is due, and perform the necessary reset if applicable.
Without knowing exactly *which* light is illuminated, providing precise instructions is impossible. Focus on identifying the light and consulting your owner's manual or a mechanic.
