Hello,
Hoping someone could help me with this. I have a 2022 RAM 1500 Bighorn with standard taillights (not LED) my left running / parking light stopped working. I went to change the bulb but it turns out that there's no 12v one the pin. Brake light works fine so does the turn signal & reverse light it's only the running light not working. I went down the wire harness and traced the wire to the main plug on the frame rail and confirmed that on the pin responsible for the rear left running light does not have 12v. That wire color is white/gray and it goes inside a taped conduit and follows the frame rail to the cabin.
I researched a bit and found out that BCM controls these lights and the 12v comes straight from it. I unplugged the bottom 3 terminals from the BCM (located in the driver left footwell) and tried to look for white/gray wire and check for continuity by running circuit tester from the confirmed pin on the back plug in the rear frame rail but could not get it to work. There are few white/gray looking wires by the BCM and I'm not sure if I'm looking in the right place. Does anyone know which wire is responsible for rear left running light?
I'm trying to determine if BCM is sending the signal and to see if the wire is ok. Also which ground may be resonsible for this circuit? Any help appreciated.
Max
Hoping someone could help me with this. I have a 2022 RAM 1500 Bighorn with standard taillights (not LED) my left running / parking light stopped working. I went to change the bulb but it turns out that there's no 12v one the pin. Brake light works fine so does the turn signal & reverse light it's only the running light not working. I went down the wire harness and traced the wire to the main plug on the frame rail and confirmed that on the pin responsible for the rear left running light does not have 12v. That wire color is white/gray and it goes inside a taped conduit and follows the frame rail to the cabin.
I researched a bit and found out that BCM controls these lights and the 12v comes straight from it. I unplugged the bottom 3 terminals from the BCM (located in the driver left footwell) and tried to look for white/gray wire and check for continuity by running circuit tester from the confirmed pin on the back plug in the rear frame rail but could not get it to work. There are few white/gray looking wires by the BCM and I'm not sure if I'm looking in the right place. Does anyone know which wire is responsible for rear left running light?
I'm trying to determine if BCM is sending the signal and to see if the wire is ok. Also which ground may be resonsible for this circuit? Any help appreciated.
Max
