help me please

[bishooooy]

hi all
do yo remember me ? am the guy making the line tracking car(robot)
well
i face now a small problem :
i use 293D h-bridge to drive current to the both the gear and stearing motors
it was working fine but
lately i noticed that when i turn on the gear motor the stearing is not working fine as if the current supplied to it become less
so how can solve this problem ?
thank yo so much for your concern and help

[franklin97355]

If you are not exceeding the power rating of the H bridge then you need to provide more total power to the motors. Bigger or more batteries.