A possible reason that only one high-beam will work is that the malfunctioning bulb is burnt out.
There is one fuse for the left highbeam and one for the right. The left fuse was loose.
HighBeam Research was created in 2002.
Blink or pulse? Many wingers install headlight modulator to pulse the highbeam during the daytime only. Legal but annoying.
either both bulbs burnt out highbeam only or you need a headlight switch (controls signals, cruise(if it has it), and headlights)
On a '93 Ranger there is an independent fuse in the underhood power distribution center just for the highbeams. Check continuity if it is good, you may have 2 other possibilities. Either the highbeam capsule bulbs are burned out or you have a problem with the highbeam multifunction switch. !!
To engage the Highbeam on your crown Vic you need to push turn signal switch towards the dash. By pulling the signal switch towards you will only flash the lights.
I have the exact same year, model etc. The high beam doesn't have a switch.. You pull the blinker switch towards you. That is how high beams work on this car. The slider bar located near the lights dims and brightens the dash board lights.
Just replaced the headlight bulbs in a 98 Grand Cherokee that had the same problem. It had the wrong bulbs in it. It had 9007's in it. Calls for 9004's.
You need a turn signal switch, but spray WD 40 up through handle first & work back & forth, sometime's that cleans the contacts !
On multi-lever/turnsignal lever.
Apparantally You Have AN Automatic Headlight Dimmer ,Shut Off Switch And your High Beams Should Work Without Holding Lever .....
If memory serves, there isn't one. All that switching is done at the turn signal/low highbeam/cruise control stalk.