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PostPosted: Tue Feb 07, 2017 10:07 pm 
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Joined: Mon Jul 29, 2013 6:44 am
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Location: Azusa,CA
I asked in another thread but got no responses so I though I would start a dedicated thread.

Any of you guys with 2014+ cars that have added fog lights how did you handle the headlight switch? I cannot find a good pic of the rear of a PPV headlamp switch but I assume they are the same as say the SS switches that have a fog light switch on them (press the circular button)

I still need to pull the pinouts on both the PPV and SS switches to see what wires need to be added if any but though I would ask if anyone has already done the ground work on this. Hoping it is just a single wire ground activated like the 11-13's.

Here is a SS switch I have on the way to me. I would assume the PPV are the same just without the HUD switches on the left:
Image

If anyone can post a pic of the front of the switch in the PPV I can't even find a clear shot of that.
EDIT Found one on autotrader. Yea I bet the headlamps parts juts switch out.

Image

Although is it me or does the SS switch with the fog lamps look more black where as the PPV looks gray??

Image

Then there is the matter of LED color. What color is the backlight in the headlight switch on the PPV?

Still have to test but I believe the terminals for the headlight switch are JST. The service manual lists the replacement as SAIT-A03T-M064 but that is for the small wires GM uses. I have been using the same terminals only a slight bit bigger for the AUX cords for a few years now so I got a supply of those. Those are SAIT-A02T-M064. Bit easier to work with a larger wire.

Image

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Steve Walker
Azusa, CA
'11 PPV 9C3 Huron White


Last edited by smwalker on Sat Oct 28, 2017 8:29 pm, edited 1 time in total.

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PostPosted: Tue Feb 07, 2017 11:27 pm 
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Joined: Thu Nov 14, 2013 8:06 pm
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Location: Metro Detroit MI
Well if you want to wire it like factory we can enable them in the BCM. The fog lamp indicator is likely already enabled in the cluster as well food for thought. PS you should add the HUD too LOL :D

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Chris White
http://www.whiteautoandmedia.com
2015 Jeep SRT - Stock for a hot minute.
2016 SRX - Custom BCM/HMI - More to come
2016 Yukon Denali XL - Custom BCM/HMI/IPC


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PostPosted: Wed Feb 08, 2017 7:31 pm 
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Joined: Mon Jul 29, 2013 6:44 am
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Location: Azusa,CA
Reading the circuit description it does not seem to be the same as the 11-13 in that they turn on with a momentary ground as opposed to the 11-13 that just use a continuous ground. So a trip through the BCM maybe the best solution.

Circuit/System Description

The front fog lamp switch is an input to the body control module (BCM) and is contained in the headlamp switch assembly. The BCM supplies voltage to the front fog lamp switch via the front fog lamp and instrument panel dimmer switch B+ circuit. When the front fog lamp switch is pressed, voltage from the B+ circuit is pulled down through the front fog lamp switch resistor. The front fog lamp resistor is part of the resistor ladder that also provides the dimming signals for the instrument panel dimmer switches. The BCM receives the voltage signal through the front fog lamp and instrument panel dimmer switch signal circuit.

The front fog lamp relay is supplied with battery voltage at all times. The front fog lamp switch signal circuit is grounded momentarily by pressing the front fog lamp switch. The body control module (BCM) energizes the front fog lamp relay by applying ground to the front fog lamp relay control circuit. When the front fog lamp relay is energized, the relay switch contacts close and battery voltage is applied through the front fog lamp fuse to the front fog lamp control circuit which illuminates the front fog lamps.



Chris have done any work on 14+ yet? Think the fog light functionality would be active already? they usually do stuff like that on BCM's?

Would be nice if we could just add wires.

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Steve Walker
Azusa, CA
'11 PPV 9C3 Huron White


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PostPosted: Wed Feb 08, 2017 9:51 pm 
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Joined: Wed Sep 21, 2016 2:30 am
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Location: Maine
Are the pigtails down buy the lights for the fog lights or do you have to run your own?

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PostPosted: Wed Feb 08, 2017 11:00 pm 
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Joined: Mon Jul 29, 2013 6:44 am
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Location: Azusa,CA
No Moa wrote:
Are the pigtails down buy the lights for the fog lights or do you have to run your own?


They were not for the 11-13's Would not suspect 14's to have them since it never was an option in the US. Probly the same for the BCm programming now that i think of it.

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Steve Walker
Azusa, CA
'11 PPV 9C3 Huron White


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PostPosted: Sun Feb 12, 2017 8:52 pm 
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Joined: Mon Jul 29, 2013 6:44 am
Posts: 1363
Location: Azusa,CA
I have been reading up on how to make the momentary switch work with relays. There is a configuration called a latched ladder that will work. Of course making one yourself is a mess of wires but the alarm company DEI does make a module that handle that type of input. For $12 it's not a bad solution just have to figure our where to mount it. This of course is a way to bypass the BCM reprogram. If you were to program the BCM to accept the fog light signal the BCM would handle the work of the DEI relay module. So the BCM reprogram would be the more elegant route to take. The last piece to determine is if there are contacts in the underhood fuse box for the fog light relay and if those contacts are wired up inside the fuse box. 11-13 they were not, 14+ I am not sure.

Module sheet here:
http://www.the12volt.com/installbay/upl ... _relay.pdf


EDIT so it seems our Impala Brethren had the same issue. A company BB Engineer laid out the solution using the 611T module. Looking at their site now think they are no longer in business.

http://www.bbengineer.com/

Image

So everything would work except the indicator in the cluster. But as long as you wired the relay to turn off with the parking lights or vehicle ignition you would never really have to worry about them staying on and needing the indicator.

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Steve Walker
Azusa, CA
'11 PPV 9C3 Huron White


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