Lo-beams not working

gee the battery may have died due to alternator is dead
and if true will repeat endless.
the BCM goes nuts below, 10vdc, and is normal that
battery is 12.6vdc charged.
and 13-15vdc engine running,s
so charge the battery backup, (a tool)
chevy

Check your connections on the battery and the ground straps to engine to frame and frame to body.

bad connection or bad earth check all connection or bulb

I would check for the groundwire continuity

Driver side - dim low beams and no hi beam - Subaru Outback ...

www.subaruoutback.org > ... > General > Electrical & Electronics

Oct 11, 2014 - Hi everyone, My drivers side headlights are dim on low, (car has separate bulbs ... When the headlight switch is turned ON, but for low beams, ...

Driver-side Low beam Not Working (electrical issue not bulb ...

www.hummer4x4offroad.com/.../showthread.php?...Driver-side-Low-be...

Mar 12, 2015 - 10 posts - ‎4 authors
The high beam continues to work on both sides...I pulled the Driverside headlamp fuse and then both left and right beams lit up but very dim.

High beams ok, but not low beam - one side only - TDIClub Forums

forums.tdiclub.com > ... > VW MKIV-A4 TDIs (VE and PD)

Jan 23, 2014 - My driver's side lights are working fine - high and low beams. ... But it definitely looks like the big lamp on the driver's side gets brighter when ..... Drivers side headlight is very dim on low beam and goes out when on high beam ...

Dim driver's side headlight (low & high beam) - GrandAmGT.com Forum

www.grandamgt.com > ... > Technical Q&A

Dec 11, 2002 - 6 posts - ‎4 authors

First check light relay fuse, if ok check battery voltage at low beam light terminal, if ok replace low beam bulb, if no voltage check switch side of relay, if voltage replace relay, if no voltage check headlight low beam switch.

If you can drive it,go to Autozone,they will test your alternator and battery for free,only takes a few minutes.

You have a dead battery.
The procedure to fix it is as follows:
1) Charge battery.
2) check alternator belt tension. If loose, tighten or replace.
3) If still no start, replace battery.

SOUND LIKE FAULTY STARTER SOLENOID OR STARTER MAKE SURE BATTERY CABLES AND BATTERY POST TIGHT CLEAN TURN OFF RADIO FIRST BEFORE REMOVING BATTERY CABLES. TO KEEP FROM LOSING CODE. USE A MEMORY SAVER IN CIGARETTE LIGHTER BEFORE REMOVING BATTERY CABLE.BMW WARNING YOU BECAUSE YOU SHUT DOWN PCM VECHICLE HAS TO BE TOWED IN AND REPROGRAMED .IF ALL IS GOOD YOU COULD HAVE PROBLEM IN ELECTRONIC IMMOBILIZER CONTROL OR FAULT IN THE TRANSMISSION CONTROL UNIT.

The alternator has stopped charging for some reason.
First check alternator drive belt is ok;
Check dash 'battery' (or 'ALT') light illuminates when ignition on and motor not running- if not, check 'ALT' lamp is not blown and connections to alternator are ok;
If all above ok, the alternator may be faulty.

https://s1.postimg.org/1i7q5btlu7/headlamps.jpg

Click on the link.
The top wires to headlamp are voltage for hi or lo beam.
The bottom black wire is ground. You can use a test light to check voltage and ground.