[rustyescott]

ok i have a 93 f350 7.3 idi . was working on trl lite plug the other day. now my marker lites stay on all the time. replaced headlite switch, unpluged trl lite harness marker lites still on disable batts overnite markers stay off when reconnect batts. any possible ideas why this is happening

 

[drinkypoo]

you've created a short someplace. the output of a relay is tied back to the input and holds it closed once it's closed once.