My F115TLRD charging system failed. I removed the Voltage Rectifier/Regulator (VRR) and noticed a spot on the back of it that indicated that it had overheated.
The ground terminal on the plug was burned - melted plastic and blackened terminal. I did a stationary test on the stator and the diodes. The three legs of the stator showed no open circuits and the diodes also checked out. I also checked the ground terminal to engine ground and it also appeared to be good. I replaced the VRR and ran the engine for a few seconds, Still not charging. I checked the VRR plug and noticed that it had burned the ground terminal again.
I then did a dynamic test (engine running) on the stator. All three legs were producing 19-20 VAC as specified.
I am stumped. Help would be appreciated.
The ground terminal on the plug was burned - melted plastic and blackened terminal. I did a stationary test on the stator and the diodes. The three legs of the stator showed no open circuits and the diodes also checked out. I also checked the ground terminal to engine ground and it also appeared to be good. I replaced the VRR and ran the engine for a few seconds, Still not charging. I checked the VRR plug and noticed that it had burned the ground terminal again.
I then did a dynamic test (engine running) on the stator. All three legs were producing 19-20 VAC as specified.
I am stumped. Help would be appreciated.