I am having a lot of trouble it starts when I couldn't start my car so we replaced the solenoid and that lasted about a week and then the starter stayed on and tore it up so we had to replace the selonoid and the starter then another week later had to replace the selonoid again so now it happened again the starter stayed on so what do you think the problem is please help

 

it may have a bad ignition switch , meaning the electrical portion that is triggering selonoid operation

 

could that cause the solenoid to go bad?