To figure out what it refers to, you'd need more context. Here's what's likely:
* Typo or Misremembered Name: It's possible the term is slightly off. The relay might be for a system related to Automatic Parking System (if your Ram has that feature), Adaptive Cruise Control, or another system starting with "AP." Check your owner's manual for relay locations and associated systems.
* Aftermarket Addition: The relay might be part of a custom installation or aftermarket accessory. If it's not in the owner's manual, you'll need to trace the wiring to determine its function.
* Internal Dodge Abbreviation: In rare cases, manufacturers use internal abbreviations not found in public documentation. However, this is unlikely.
To find out what it is, provide more information, such as:
* Where did you hear about this APS relay? (e.g., a mechanic, forum, repair manual)
* What is it supposed to control? (e.g., a light, a motor, a specific feature)
* Where is the relay located? (e.g., under the hood, in the cab)
* What is the truck's year and model? (This is crucial for determining the correct wiring diagrams and components)
With additional details, it will be much easier to identify what the "APS relay" actually is.
