ive got a 84 240 and have a problem with the light switch. whenever i turn the lights on everything else comes on but my guage cluster lights are messed up. it lights up everything on the guage!! both arrows, all of the bottom mesage lights. and when i disconnect the wires to the switch it all the lights go off. but whenver i put it back on all the lights come on. but not the guage clusters they are all lighting up the wrong thing. i looked at the plastic wire connection and it is melted for some reason. how do i fix this??