2001 Dodge Dakota Quad Cab SLT 3.9L.

I have a low mileage Dakota with 74,000. I have a reoccurring issue that seems to be resolved by relay replacements. I will get a check engine light related to any of the items in the relay control (wipers, fuel pump, ignition, transmission shifting). It happens fairly often, and cycles through each of these items. If I replace the relay the issue will go away. For instance, right now check engine fired P0753. Seems related to transmission solenoid. Shifting is not occurring properly, feels like I am taking off in higher gear and won't shift when I hit the gas hard. When I swap a new relay in the issue goes away. I bench check the relay I just pulled out and I can hear the coil clicking and I have continuity from 30-87 with load applied. The relay seems good. I have replaced every relay in the box multiple times and cannot imagine they all keep failing this often.

Other times, a wiper will work, but get hung up and not go down when you flip it off. Replace the relay, it fixes it.
Other times, the ignition will not crank. Replace the relay it fixes immediately.
Other times, it cranks but will not start. Replace the fuel pump relay, it starts immediately.

Any recommendations on where to start with this issue? Perhaps pull the relay box and check connections for corrosion.

Thanks for any guidance.

 

Corrosion sounds like a likely culprit to me. Next time something fails, just unplug/plug the same relay a couple times, and see if the problem goes away.