[J6Performancehorses]

Having an issue with my 90 w250.
As soon as I turn the key off regardless if my lights are on or off my brake lights saty on.
Any help on the matter would be helpful considering my battery is dead now.
The truck has an old trailer brake controller could it be wired wrong ? just got this truck and am having friends work on it since I am at work in another state.

 

[J6Performancehorses]

brake lights

Could you be a little more specific. I am trying to explain this to a pregnant wife in snowy Colorado. Is it on the firewall ? where is it in relation to the brake pedal ?