Car won't start
I got a 2000 ford contour with a 2.0 4 banger
and I had to change the serpentine belt and
the serpentine tensioner pulley and the idler
pulley then the next day my wife went out to
start it and it ran for about 15 min and when
she went back out to leave she turned on the
heat and nothing and when she turned on
the heater the lights came on then the lights
started to get dim and she turned it off now
it won't start any suggestions