View Single Post
Old Oct 29, 2025 | 09:26 AM
  #5 (permalink)  
pizzaguy's Avatar
pizzaguy
Administrator
Joined: Jun 2009
Posts: 13,949
Likes: 1,276
From: Fort Worth, Texas
Default Re: Fuel pump has power but doesn’t work?

[QUOTE=M60A3Driver;1001617]Here's a video on how to test your RCM:
/QUOTE]
All that does is prove the coil in the relay is good, and it's path to the pins is good. It does not validate unswitch power to the armatures, or switched power from armature to external pin.
Additionally, it does not prove the armature contacts are making contact and providing a low resistance path from source to load.

Measuring the output pin(s) in question, with the module in the car, would validate all of the above.
 
Reply