P0703 code brake switch b input circuit

[promodracer]

Well i have been throwing this code. My brake pedal switch inside truck and outside below master cylinder have been replaced.
Cruise control worked few times during the day of repair, now it no longer works.
The truck allows me to put it in gear two out of every three cold starts ( MN )
Without deleting code it goes into gear once truck warms up.
Thanks

[firefighter317]

sounds like you may have a bad brake light switch from the factory. Id take the one you put on and try swapping it with another one. if you have a scan tool, check and make sure the brake light switch (will probably read BOO on scan tool) reads "on" when you push it down and "off" when your foot is off of it. check voltage and ground at your connector to make sure you have a complete circuit. If it reads "on" when you disconnect the switch, replace the switch.