Good day, I have the box under the left seat, with harness installed for the trailer lights. Nothing is working have 6 volt constant on all point regardless of key and or switched on

Engine starts but the engine light comes on and stays on. Have removed -ve terminal but does not reset itself

Battery keeps going flat after 3 days while it locked up in shed I been told the theft moderla not powering down when turned off the Battery I have in now is the 9th since 2013 and it couple weeks old… 

3.2 2016 Ford ranger cranks but can't pickup
. It is automatic transmission.

The vehicle randomly goes into limp mode, after sensor indicate ecs, downhill assist, power steering, basically all electronic assists no longer function. Ford says they can't pick up the fault, vehic…