Last week, I changed my BCM on my Dakota and got my left headlight to work. Within 20 minutes after changing the BCM, the headlight went off and hasn't came back on. I've unplugged and plugged the connector to the BCM and checked ground but nothing. Is there anything else I should check because I'm running out of ideas.

 

In the engine bay fuse box there are two 20 amp brakers labeled CTM A and CTM B. Try swapping them and see if the bad light switches.
Reference this post for details:
https://dodgeforum.com/forum/2nd-gen...-a-dakota.html

 

I did that just now and the only headlight that's working is my right

 

Since the light switched sides then it means you have a bad breaker. Order yourself a new one and your good to go.

 

Okay I'll let you know how that goes. I appreciate it.

 

I brought two 20amp breaker fuse and replaced them but that didn't work. Anything else I should check?

 

Did you replace both fuses with new ones? Did both headlights fail to light up after? If the working one swapped sides when you swapped the fuses around then its either a blown fuse or possibly a shared but semi bad ground. Usually there would be a whole slew of issues if it was a bad ground though. Did the fuses look the same as the originals? Some of the relays and other electrical bits are hard to find these days. Might have gotten the incorrect ones.

 

​​​​​​No. My right headlight still works, my left headlight hasn't came back on since I replaced my BCM. Yes, replaced both. The original ones were two different 20amp breakers. I bought two of the same kind. I'll send you a picture when I get home.

 

The new ones

The old two

The old ones

 

Okay, looks like I misread one of your previous comments. I thought you said the working light switched sides when you swapped the fuses. Do you have a volt meter? If not you can probably rent one from a parts house.


Turn on the lights then Pull one of those two fuses to located which one is which side. After you have figured out which side is which insert the positive probe in one of the slots of the dead lights side. Make sure to check both slots to ensure you have the hot side. Then ground the negative probe on the battery. If it show's voltage then we know the break is further down and likely a broken wire or bad connector. If it doesn't then you know the break is on the other side and should see if you can get the fuse box pulled up. Sometimes the bars underneath get corroded or damaged.