2016 F350 Lariat, 6.7l. Recently I found that my high beams do not Latch on when I pull the multi-function (left side of steering column) toward me. They do come on and stay on so long as I am depressing the lever away-from or toward me. As soon as I let it return to center, they go off. I replaced the SW7016 multi-function switch (easy replacement) but it made no difference. Is there perhaps a relay that controls the "latching" of the high beams to on?
If there is a post already on this, I could not find it. Any help anyone can provide is appreciated. I already ate the $100 cost of the multi-function switch because it is electrical and cannot be returned once tried.

 

Probably not what you want to hear but the actual switching of the headlamps is done by the Body Control Module (BCM). Its all done through logic circuits with the multi-function switch as the input to the BCM.

Have you scanned for any codes?

 

Thank you. I have not scanned for codes but will do that. Any idea what a BCM costs? Dealerships are closed today. I assume there is nothing to repair with a BCM, only replace.

 

I am confused... you say they "latch" when pushing the lever away but don't stay when pulling towards? That's exactly how the switch works. away for high beams, towards for flashing and is momentary. Am I mis-reading things?

 

They don’t latch on no matter which way i move the lever.

 

Strange. Pulling the MFCS towards the driver should activate a momentarily or fast use of the high beam function. Away from the driver should activate a steady High beam function. This should also have the latch effect the OP is describing. Anytime the high beams are either momentarily or running, the fog lights should turn off unless the BCM was told otherwise like in Bambi mode.

BCMs are going to be expensive to purchase and have programmed. I am also not saying this could not be the issue. However, this sounds like a parts cannon approach to the matter. I am not sure this is the direction you need to be going in. Is it possible to make a video, upload to Youtube and then add the link in this thread so others can see what is going on? Thanks!

 

My 99 , the high beam , moving the lever toward the dash , is a mechanical action . As it stays forward until moved back to the low position .

 

Have to ask, you do have the head light switch on when you’re trying this right? If the head light switch is off, the high beams won’t stay on unless held on.

 

The high beams on the switch is mechanical. Requires no electrical communication .
example, is if you have the high beams on , when you turn the truck off , they will be on with the lights on , when you start the truck ... follow me ? .
If you start the truck , after having the high beams on , and turn the lights on with the switch , they will be on high beam . .it is as simple of a thing as tying your shoes .

 

On 2011-2016 trucks the high beam switch and turn signal switch don’t latch like 2010 and earlier trucks, everything is done by the SCCM and BCM on 2011-2016 trucks.

 

Correct. Both the old multifunction lever and the new one have no mechanical Latch when pushed away or toward driver. This was confirmed with the parts guy at ORielies with a 3rd new lever off his shelf. The latching is controlled elsewhere.

 

Since I didn't see this stated, and I'm not sure if you know it (it may be obvious but I'm going to be overly cautious here), pulling the MFS toward the driver initiates the 'flash to pass' function - in other words, if you are signalling a vehicle ahead of you that you intend to pass, you pull it toward you momentarily and release. This causes the high beams to come on momentarily then shut back off. PUSHING the MFS away from the driver should cause the high beams to come on and stay on, even when released. The lever will NOT stay forward on a 2011+ truck, it should return to the middle position but the high beams should stay activated.

If they don't, you said you already replaced the MFS switch so that SHOULD be ruled out. I would lean at that point toward the BCM, but really you'll need to be watching inputs/outputs of the system to see if you can troubleshoot what's going on.

 

Very happy news to report. I finally decided that I was not going to replace the BCM (body control module) to fix this (to the tune of $600). I decided I would use one of my 4 extension switches and wire it to a relay to run the high beams.
When I removed the passenger headlight so I could find the proper wire to drive hot, I found with-the-headlight-removed, the high beams WOULD LATCH!. So in diagnosis mode, I reconnected the passenger head light and they still worked. Perhaps the connection to the Highbeam/lowbeam bulb was partially connected or not at all. In any case, it is all back together and working normally.
In the end it did cost me a $100 for the replacement console lever but I am happy it works without spending $600 for a BCM.

Thanks for all the commenters that tried to help out.