2016 XLT SCC 5.0

Wondering if I can get some insight as to why this SCM isn't working.

I connected the SCM under the dash to the two available connectors (green and black).
The on/off buttons were added and connected. They are not illuminated though. (Terminals 1,2,4,6 do not have 12 volts which is supplied by the SCM).
I then used Forscan to enable the SCM in the Body Control Module. (726-56-01 0000-0100-0186)
Nothing works.

I tested the spotlight with an external 12v power source and it works.

Any ideas? Do I have a faulty SCM (from vehicle recyclers)

 

Hint: If you want people to help you, you need to supply some information.

Model year, trim level, other options, aftermarket mods, etc.

 

Terminals 1,2 and 3 are power supplied to the Spot light module. 1 and 3 should be hot all the time, 4&6 should only be hot when the spot lights are turned on. In my 2015, 1&3 are supplied by fuse 16, a 10amp. Terminal 2 is what enables the the spot lights from the BCM, so if all conditions are met, its ok to turn the spot lights on.(speed under xx mph) Terminal 5 is ground.

 

Here is the electrical schematic for the 2016:

 

Is the key in the on/run position?

 

Thanks for the diagram. I did refer to it. Pint 1 and 3 have power. 2 does not. Thinking that activating Spotlight enables pin 5 <5mph, I tried again in Forscan but no luck. I took a jumper and jumped 1 to 2 and the SCM lit up the mirror spotlight - it functions! So it seems that either a) Forscan has not activated the BCM thus not sending 12 v to terminal 2 OR b) there is something wrong with line CLF76. Is it possible the FET malfunctioned at the BCM?? What can I do to check and narrow down the problem?

 

If the FET had failed there would be a DTC. Have you checked for DTCs with FORScan? Try the old disconnect the battery for 20 min trick.

Did you confirm your PID change? It is easy to make a mistake. Don't ask me how I know.

 

When your head lights are on at night, are the spot light switches back lighting on? Just verifying the switches are plugged in.

 

Always the possibility of the CLF76 wire not being completely inserted into one of the plugs, or for that matter a plug not being fully plugged in, it has happened before, everything works except for one circuit. Plugs C212 and C2280E are hard to reach under the passenger side by the fuse box(BCM). If that FET is bad, that means the BCM has to be changed and programmed, not a small job. Hard to believe that it is bad though and as said, you should have a DTC showing.

 

Yes they illuminate the buttons graphics but that feature is by a separate wire not part of the SCM. Thanks!