Motor Vehicle Maintenance & Repair Asked by Vexer on February 26, 2021
2013 Ford Edge SEL in Canada (DRL is the highbeam at lower voltage)
Right side light started, weeks ago, with flickering while the car was turning to start, but stops flickering and works fine afterwards.
Now the right side low/high beam (one light bulb for both) no longer turns on.
Swapped lights between left/right, the right still wont come on.
Checked fuses for Right/Left headlights, both are okay and swapped to be safe. Still no luck.
Using multimeter, checked the connector inside the housing, no power.
Checked the connector that plugs into the entire light housing, no power on 3 out of 5 pins (1 is ground, and 1 is for the ‘parking’ lights which has power, the rest don’t).
Any thoughts on what could be the issue?
If relay, would both sides stop working? or could it be a bad relay where one side isn’t working?
Hoping this is not a wiring issue so I don’t have to start ripping out wiring from the car to replace.
I've fixed this.
The issue was with the BCM (Body Control Module) and SJB (Smart Junction Box) There are no issues with fuses or relays, but rather the computer essentially cut power off to one wire for front lights (Front Light Control Module) due to a possible short circuit.
Because my light flickered a few times after installing HID, it eventually determined there was a possible short.
I was able to fix this on my own without a service visit by using a "Veepak" ODBII reader, and "FORscan" app from the Android Play store (7.99 is well worth it!)
The app was amazing, and allowed me to do a lot more than Torque could do (another app from Android PLaystore)
Using this app, I reset the FLCM (Front Light Control Module), and the BCM (Body Control Module). Once reset, I ran "tests" which FORscan does, similar to the Ford Service software at dealerships, and performs a number of lighting and software tests - it revealed no issues and turned the headlight back on. The test was great, it goes through all warning scenarios on the phone, and causes the cluster to display that warning or similar (CIL,MILetc..) eventually comes back with fault found and explains it in details, or "OK"
In the end, it all made sense. Because my HIDs that I installed were 55W, they didn't have enough power when the car was turning and caused the balast/light to flicker if the light was on while car was trying to start. When that happens enough, the car assumes a "Power to Ground short" (as the car's BCM displayed) and ceases to send power to that wire, until fixed.
The one thing I hate about this is that it does not show me this on my cluster, no check engine light, no MIL, etc.. which is odd since the car has a "System Health Check" option in the dashboard.
Additionally, the FORscan app I use will show me TPMS reads as well! I found it incredibly annoying that my car will simply say "OK" or "LOW" when my tire pressure is low or good, but not the actual reading. This app will show you outer pressure, TPMS readings, etc.. for each tire! THat's just one of thousands of other readings it can give you, along with module resets, and customizations and live data/diagnostics
I instantly fell in love with the app and think its well worth OVER 7.99 in my opinion! It saved me lots more money at the dealership.
Answered by Vexer on February 26, 2021
so i have tried this fix stated above and it did not work. i used my snap on solus edge to read head light codes and BCM codes there are none. if i use a test light on the socket it lights up showing the socket is getting power but the bulb will not light up i switched bulbs from left to right and it works on the opposite side and the other bulb does not work on that side. any one have any ideas as this is now stumping me. have checked fuses and relays and all is good as i said the socket gets power to my test light but the bulb will not light up. HELP
Answered by David Cook on February 26, 2021
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