'21 Sport Big Bend headlight harness pin layout?

[Snooter]

A deer ran into my bronco a month or so ago, broke the plastic for my passenger headlight and dented up the side panels. Drove it around with tape until 2 weeks ago the entire headlight went out.

Thinking there was only one headlight assembly for the bronco sport, I purchased one off ebay. After swapping the headlight out and testing it...it did not light up. Looking at the headlight pins, turns out the pins on the headlight do not line up with my harness.

Photo #1 is my original headlight
Photo #2 is the headlight I bought off ebay
Photo #3 is another headlight I found after finding out headlight #2 did not work
Photo #4 is my harness

So my questions are... why are there different headlight pin patterns? Is there any way i can get headlight #2 to work with my harness? I've done small electronic and solder work, so I am a little familiar with replacing connectors and headers. I just have no idea which wire would associate with the pins on the new headlight.

If i can't get headlight #2 to work I have the possibility of sending it back for a refund. If I purchase headlight #3 I am hoping it would work?? I'm just confused why there are 7 pins instead of 6. There is an extra pin on the top right of headlight #3 that my harness has no wire associated with it. Would it still work?

I've searched google for an hour and couldn't find any diagram for the harness wires. Does anyone have experience with this?

 

[Quashish]

What's the link to what you purchased?

There's 2 styles of Headlamp assemblies for different trims

 

[Snooter]

What's the link to what you purchased?

There's 2 styles of Headlamp assemblies for different trims

https://ebay.us/m/iGQMN1

 

[Quashish]

Looks like that model is compatible with the signature lighting package. Like on the badlands and optional on some outer banks

 

[Snooter]

So would it be possible to move the lower left pin to the top right to match the headlight? Or are all the pins connected to the wrong wires in my harness? For the 3rd headlight, why does it have 7 pins?

 

[beaudointl]

A deer ran into my bronco a month or so ago, broke the plastic for my passenger headlight and dented up the side panels. Drove it around with tape until 2 weeks ago the entire headlight went out.

Thinking there was only one headlight assembly for the bronco sport, I purchased one off ebay. After swapping the headlight out and testing it...it did not light up. Looking at the headlight pins, turns out the pins on the headlight do not line up with my harness.

Photo #1 is my original headlight
Photo #2 is the headlight I bought off ebay
Photo #3 is another headlight I found after finding out headlight #2 did not work
Photo #4 is my harness

So my questions are... why are there different headlight pin patterns? Is there any way i can get headlight #2 to work with my harness? I've done small electronic and solder work, so I am a little familiar with replacing connectors and headers. I just have no idea which wire would associate with the pins on the new headlight.

If i can't get headlight #2 to work I have the possibility of sending it back for a refund. If I purchase headlight #3 I am hoping it would work?? I'm just confused why there are 7 pins instead of 6. There is an extra pin on the top right of headlight #3 that my harness has no wire associated with it. Would it still work?

I've searched google for an hour and couldn't find any diagram for the harness wires. Does anyone have experience with this?

Attached are pics of the RH headlamp connector and pin out info. Hope this helps.

 

[Snooter]

Thanks so much for the images! Will swap the ground location after work. Will update when done

 

[beaudointl]

Thanks so much for the images! Will swap the ground location after work. Will update when done

Hope it helps. Just to clarify, this is for the RH or passenger side. Good luck.

 

[Snooter]

Just moved the ground wire over to the corresponding pin during lunch break. The light turns on! Thanks everyone for the help!

I did manage to mess up the temperature sensor when swapping the headlight though.. display shows -- next to the time and I have a check engine light on now ?. Problem for another day!

 

[Snooter]

Unfortunately I am back. I forgot to insert the plastic cap that keeps all the harness connectors separated when attempting to plug the headlight in..when I was removing the harness from the new headlight, connectors must have touched. The headlight went bright then shut off. I thought i had just shorted the headlight so I ordered a new one.

New one just arrived and it is not working. Took a multimeter to each of the wires. Blue/white in pin 4 and blue/white in pin 14 are showing 0v when they should be 12v.

I have already swapped Fuses in both fuse location #25 and #26 for both headlights. It still reads 0v..

How do I fix this??

 

[Quashish]

Wish i could help.

bump

 

[Dude]

Unfortunately I am back. I forgot to insert the plastic cap that keeps all the harness connectors separated when attempting to plug the headlight in..when I was removing the harness from the new headlight, connectors must have touched. The headlight went bright then shut off. I thought i had just shorted the headlight so I ordered a new one.

New one just arrived and it is not working. Took a multimeter to each of the wires. Blue/white in pin 4 and blue/white in pin 14 are showing 0v when they should be 12v.

I have already swapped Fuses in both fuse location #25 and #26 for both headlights. It still reads 0v..

How do I fix this??

The BCM wiring diagrams shows the BCM has Field Effect Transistors (FETs) which drive the signals you are referring to

worst case is you blew out one or more of these transistors and best case the lines are fused so only a fuse (or possibly is a circuit breaker) needs to be corrected (I don’t recall exactly)

however you did say you already tried swapping fuses but you also may want to separately verify the fuses are good by removing from the vehicle and testing the fuses

Do you have access to the wiring diagrams? Others on this Forum have purchased the wiring diagrams (and may respond to you) or you can search on this Forum for the recommended vendor (Internet website) to purchase this

And I do see Post #6 shows fuse on some of the wires but I didn’t study the diagram carefully to match up with the signals you referred to above and also shows the transistors but the posted diagram isn’t very clear

( I don’t see pins 4 and 14 shown in the schematic diagram in post #6 and in the table pin 4 shows as CBBF8 (GY-BU) not blue/white as you stated above )

 

[beaudointl]

Unfortunately I am back. I forgot to insert the plastic cap that keeps all the harness connectors separated when attempting to plug the headlight in..when I was removing the harness from the new headlight, connectors must have touched. The headlight went bright then shut off. I thought i had just shorted the headlight so I ordered a new one.

New one just arrived and it is not working. Took a multimeter to each of the wires. Blue/white in pin 4 and blue/white in pin 14 are showing 0v when they should be 12v.

I have already swapped Fuses in both fuse location #25 and #26 for both headlights. It still reads 0v..

How do I fix this??

Pin 14 is a lamp outage circuit which may not indicate on a multimeter. However pin 4 gets its power from a 25a fuse, # 158 in the battery junction box. I would check there.

 

[beaudointl]

Pin 14 is a lamp outage circuit which may not indicate on a multimeter. However pin 4 gets its power from a 25a fuse, # 158 in the battery junction box. I would check there.

Also, pins 8&9 are your grounds. When checking for power it is always advisable to do it with a test light vice meter to ensure the circuit can actually carry a load. A meter will work in a pinch, especially since you are showing 0v.

 

[Snooter]

Pin 14 is a lamp outage circuit which may not indicate on a multimeter. However pin 4 gets its power from a 25a fuse, # 158 in the battery junction box. I would check there.

Thanks for the info. Unfortunately my manual only goes up to #88 so im not sure where #158 would be?

I did do one more test with fuses #25 and #26. #26 fuse reads 12v, but #25 is 0. I have put a brand new fuse into #25 and even put the fuse from #26 into #25 to make absolutely sure the fuse was good. Reading 0v no matter what.

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