So I wired my buzzer as pictured below. And my right (passenger) headlight is very low. Today it didn't even turn on, I had to bang it!

Pics:
Here I wired the red wire to my right headlight




What's going on?

 

Try a bigger fuse. It might be drawing to much

 

NO. DO NOT UP THE FUSE. A fuse is rated to protect the wire. If a circuit can not provide enough power, then something is wrong with the circuit. Uprating a fuse can result in a fire because the wire is not capable of sustaining what the fuse can. Disconnect your buzzer and check the headlight. What kind of buzzer did you use?

 

He added something extra to the circuit causing draw. A 15 amp fuse would not cause a fire. The reason its dim is because the buzzer (which does not belong) is drawing the amps off the headlights.
A 30 amp fuse probably wouldn't even cause fire. The wire is the same gauge as all the other wires in his fuse box. And if the gauge will take the amperage then the fuse will blow first. He has already proven its not a bad connection, other wise it would have blown the 10 amp.

 

an excessive draw of over 10a would also blow the fuse. that is the idea behind a fast blow fuse. a buzzer should not draw over 500mA even if it is a huge piezo buzzer. in fact, you could install a alarm siren and that will not draw over 500mA. the buzzer, if it does not have reverse polarity draw (diode) should not be installed the way it is. what it is doing is creating a jump circuit between the 2 circuits.

REMOVE your buzzer to check the problem. If your buzzer is the problem, rectify it with a diode and install to another location such as the door trigger and parking light plug in location at the fuse box.

 

thanks guys, I will try these things before it gets dark.