Headlight bulb failed and it affected both right and left standard beams. Why?
Switches, relays, and fuses all checkout as working properly. Left standard
headlamp bulb shield is very dark presumed from overheating. Checked bulb
and it had failed. As soon as bulb was removed the right headlight came on.
Replaced both bulbs. Now working but why does one bulb affect the other.
Separate circuits Right? Makes no sense.