87 F-150 lights

Hello all ,
New here but not a newb to cars trucks or computers .:-) I just got this truck at a good price but I cannot figgure out the lights , at first I had all but head lamps so I replaced the switch with that leaving me with having to put the switch inbetween parking and head lights to get anything at all . Now on the third switch . I cannot imagine that I have put in the rod wrong as it kinda seems like a no-brainer ???????
Any ideas would be great .
Thanks , nermy

Check your floor mounted dimmer switch. Bet it is shorted out.