Help With Kill Switch

[moe&michelle]

i have a 95 sc400, & when i purchased the car 6 years ago, the previous owner made the wireless switch ( when sitting in car drivers side by left knee)a switch to de-activate the kill switch, so the car will start. i have never had a problem until recently, the indicator light has not been coming on at all stays solid when not activated the will blink when activated. ...could it be the switch?,

[moe&michelle]

now my car will start(barely) and when it does it surges and half my dash lights do not work?? doe anybody have any suggestions?

[1990LS400]

Check for stored error codes? Check the charging system (alternator, battery and all connections)?