HELP 2016 Ranger 3.2 Left dipped beam dead?

[SergeantSodom]

Hi folks,

Just got myself a 2016 3.2 (UK), and have an issue with the left headlight.

The previous owner mixed LED with halogen, and has added an LED light bar which triggers on high beam only through a relay, which is fused before the battery.

The other night, I was driving when I had the high beam on, then boom... both of my front dipped lights stopped working.

I took out the various LEDS and replaced them with the correct halogen, but my left dipped beam will just not work... ive tried a few different bulbs with no luck, and even the old LED won't work.

The previous owner has wired the led light bar tapping it through the left headlight loom, so im assuming the fault lies there. However it wouldn't explain why the full beam and led light bar work completely fine, but just the dipped beam doesn't...?

I was wondering if a BCM reset would work, but there are no codes or faults I can see through OBD, and am waiting on an OBD reader where I can run through a laptop with forscan to see if its just the code isn't showing on my cheapy obd scanner. But until then im a bit lost as to where to look. Possibly considered taking the wiring off rhe battery for the light bar and seeing what happens then, but again im just not sure if its worth the hassle.

Any ideas?

Cheers

John

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[airline tech]

I cannot see the wiring diagram for the ROW's, so its either a wiring issue or like you have mentioned the BCM may be holding a fault. You must have a scan tool capable of reading (B) Body codes as that is what it will be.
The BCM has the capability of killing a circuit if it sees a short, that's what may have happened.

If its coded its going to be possibly: B1D00-11 or -15

Although the Rangers are almost identical the pinouts on the connectors I think are different plus I think you have separate connectors for each bulb coming off the main harness.
The US Version has a single connector from the harness and the individual bulb connectors are internal to the headlamp itself.

I would do a close inspection of the bulb connector and check the contact pins and check for voltage with a meter.

If you have a single connector feeding the headlamp assembly and then the headlamp harness feeds the bulbs - you can view the thread for some Pinout Information, however I think the ROW is pinned differently.

Aftermarket Headlights - Wiring & Issues (Group Help) | 2019+ Ford Ranger and Raptor Forum (5th Generation) - Ranger5G.com

 

[SergeantSodom]

I cannot see the wiring diagram for the ROW's, so its either a wiring issue or like you have mentioned the BCM may be holding a fault. You must have a scan tool capable of reading (B) Body codes as that is what it will be.
The BCM has the capability of killing a circuit if it sees a short, that's what may have happened.

If its coded its going to be possibly: B1D00-11 or -15

Although the Rangers are almost identical the pinouts on the connectors I think are different plus I think you have separate connectors for each bulb coming off the main harness.
The US Version has a single connector from the harness and the individual bulb connectors are internal to the headlamp itself.

I would do a close inspection of the bulb connector and check the contact pins and check for voltage with a meter.

If you have a single connector feeding the headlamp assembly and then the headlamp harness feeds the bulbs - you can view the thread for some Pinout Information, however I think the ROW is pinned differently.

Aftermarket Headlights - Wiring & Issues (Group Help) | 2019+ Ford Ranger and Raptor Forum (5th Generation) - Ranger5G.com

Thanks mate.

It looks as though the headlight has one main loom with the bulbs to its own harness like you mentioned. I do have some pics of the setup, but the only thing I can find is the wiring for the LED light bar looks corroded and exposed (attached) which is spliced into the main wiring for the headlight. However I thought that would've shorted the led light, nothing else... God knows, I'll keep digging as no auto electricians are interested in this job at all ?

Cheers

John

 

[airline tech]

Then if it one (connector) to the headlight assembly - check that connector for power (Low Beam)
Not sure if the pinouts will match the US Version.
If power on that - check for power on the (Low Beam) bulb connector, if no power here the issue lies within the headlamp assembly.
If there is not power on the (main) connector then the issue is in the BCM output feed or the wiring feeding the headlamp assy - the BCM (MAY) have the circuit disabled and requires a code reset to reactivate the circuit - Its a (FET) Field Effect Transistor circuit that can disable the output power to individual circuits (its basically a electronic circuit breaker) and depending on the severity of the short - determines if it automatically resets or requires a Scan Tool to reset it.

You may be able to access the internal harness but its most likely a sealed plug feeding into the assembly.

 

[SergeantSodom]

Then if it one (connector) to the headlight assembly - check that connector for power (Low Beam)
Not sure if the pinouts will match the US Version.
If power on that - check for power on the (Low Beam) bulb connector, if no power here the issue lies within the headlamp assembly.
If there is not power on the (main) connector then the issue is in the BCM output feed or the wiring feeding the headlamp assy - the BCM (MAY) have the circuit disabled and requires a code reset to reactivate the circuit - Its a (FET) Field Effect Transistor circuit that can disable the output power to individual circuits (its basically a electronic circuit breaker) and depending on the severity of the short - determines if it automatically resets or requires a Scan Tool to reset it.

You may be able to access the internal harness but its most likely a sealed plug feeding into the assembly.

You're a star, thanks so much for the info- I'll post back with my findings

 

[Cmar]

This was a common BCM issue in Aus Rangers (I imagine your global would be the same) if the person fitting the LED headlight bulbs did not use the correct ballast resistor. It can be reset using Forscan. Note the PX1 series ( 2011-2015) BCM can only be reset a fixed number of times, the later PX2 & 3 models (2016-2022)were able to be reset an unlimited number of times. It's the reason I opted for a set of overdriven halogen bulbs (+ 150% range) instead of an LED swap, as I have a PX1. The downside is theoretically reduced bulb life, but mine have been going for 4 years now.

Here is an example.

https://forums.whirlpool.net.au/archive/9vw48m4l

 

[SergeantSodom]

This was a common BCM issue in Aus Rangers (I imagine your global would be the same) if the person fitting the LED headlight bulbs did not use the correct ballast resistor. It can be reset using Forscan. Note the PX1 series ( 2011-2015) BCM can only be reset a fixed number of times, the later PX2 & 3 models (2016-2022)were able to be reset an unlimited number of times. It's the reason I opted for a set of overdriven halogen bulbs (+ 150% range) instead of an LED swap, as I have a PX1. The downside is theoretically reduced bulb life, but mine have been going for 4 years now.

Here is an example.

https://forums.whirlpool.net.au/archive/9vw48m4l

Thanks a lot mate, not sure about mine to be honest as its reg'd in 2016 but I think it was built the latter end of 2015, it is a facelift though if that helps.

Yeah I don't like LED unless the projector and reflectors are actually designed for LED, Which this one definitely isn't. Ive a feeling the previous owner mixing things around hasn't helped matters, if the BCM is expecting a certain voltage or current and its getting mixed signals, it wouldn't surprise me if that's caused issues.

Incase also wondering if the ballast would be a potential here, if it were, what type of error would I be expecting to see?

I'll have to wait until my new obd reader comes along so that I can have a look through forscan...

Cheers dude

John

 

[Cmar]

In that case yours is a Px2 (facelift) Mine is an end of run (July 2015) PX1 but unfortunately has a few PX2 parts in it - obviously they were running out of PX1 bits for the last few built. Always fun when ordering parts, you can never be 100% sure they will match.
I believe the codes are B1D00(15) and B1D01(15). ( Assuming all the globals are the same)

Cheers
Cam

 

[SergeantSodom]

In that case yours is a Px2 (facelift) Mine is an end of run (July 2015) PX1 but unfortunately has a few PX2 parts in it - obviously they were running out of PX1 bits for the last few built. Always fun when ordering parts, you can never be 100% sure they will match.
I believe the codes are B1D00(15) and B1D01(15). ( Assuming all the globals are the same)

Cheers
Cam

So, got myself a proper obd reader and can see a consistent DTC of BD100(15) which either suggests a short somewhere, or an issue with the BCM (Unlikely knowing we have this led light bar wired off the same headlight)

Clearing the code does not fix the issue, tried 4 times ?.

There were also historic inactive codes too, not sure if this would've been when I went and blew them?

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