i have an 86 f-150 with a dumb problem.. My taillight socket was bad, causing my signal lights not to work, due to the fact that there is a ground wire going into the socket. I replaced it. Now, the bulb acts as if it isnt in there all the way. If i take the taillight off, take out the bulb and push down on it, everything will work. but as soon as i take pressure off of it, only my taillights would work. A little help please

 

Little confused about your problem..Is it grounding out?

 

Try to check on loose wiring...
This may have cause your problem...
Or you can also check if the bulb is still fine...