I am currently troubleshooting my daytime running light circuit. I have provided a detailed diagram of the steps I have already taken to isolate my problem. As of right now I have verified power across my DRL Relay pins 86 and 85 (Hot in Run or Start), verified power from the relay to the body control module, verified power across DRL fuse 10A (Hot At All Times) and up to pin 30 (Common) on the DRL Relay. I have also verified continuity across Pins 30 (commmon) and 87a (NC) when vehicle is NOT in Run or Start. When the vehicle is in Run or Start I have approximately 13.6V on pins 30, 85 and 86; on pin 87 (NO) I am only receiving approximately 4V. I have verified 4 like relays with a 12V power supply and all the relays function properly and the single pole functions properly between the double throw.
I am looking for some explanation to why I am only receiving 4V across the relay while installed. I have verified the same relay with a 12V power supply to function properly.
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