J2H

My ambulance has some light issues. It has two push buttons on the floor (one controls the brights I don't know what the other does) and sometimes when I turn the lights on the the flashers dont work and one headlight is out, but when I kick the brights on they work, this is not always the case, sometimes one sides flashers work while the other side doesn't. Is there a way or someone I can take it to to have the lighting/electrical system looked at?