Electrical problem when i apply brakes

[Ojhawaiian]

It first started with driver headlight not working. Turned it on at night and noticed both work on high beams but on low beams only the passenger side worked. I also checked both bulbs and they both are fine. So because of the dilemma i needed my car for work so i jumped the low beam wire from the passenger side to the driver side so i have light for driving in the night. It worked fine for a month but now i notice when I step on the brake pedal my aftermarket radio resets, constantly more when car is running other than that the car is so far running fine. I guess my question is because i jumped the wire is it going to cause grief to the car to where it will cause it to eventually shut off? Or get worse? Also when i do step on the brake pedal i notice all the lights flicker dash, radio, headlights or any lights on at the time. Iam stumped dont know what to check first. Or if i actually caused the problem

[tommygunzit]

Is your battery staying charged? Was it ever installed backwards. Or junped improperly? Could be you on line. relay. That's attached to you positive terminal. That's connects to alternator. May be burnt out but can't tell as insulation is prob still in tact. Simple voltmeter test would tell u mine was shuttin dash off for a second when brake applied