'95 Chevy Blazer driver's sit wire doen't have

You will have to check the switch for input power,to see if the switch itself is getting power.If so,then the switch would be bad.The switch works on a reverse polarity pattern.So you can`t replace it very well with a normal off and on switch.So you will have to get a switch like it.If the switch is good,and your sure,is there power to the switch?If not check for a breaker to be bad(in the fuse box).If there is not a breaker,follow the main power wire from the switch until you find the power source.Most likely a relay or two,and a fusible link that is burned up,just replace them as needed. You will have to check the switch for input power,to see if the switch itself is getting power.If so,then the switch would be bad.The switch works on a reverse polarity pattern.So you can`t replace it very well with a normal off and on switch.So you will have to get a switch like it.If the switch is good,and your sure,is there power to the switch?If not check for a breaker to be bad(in the fuse box).If there is not a breaker,follow the main power wire from the switch until you find the power source.Most likely a relay or two,and a fusible link that is burned up,just replace them as needed.