Tracked my surging down to the speed sensor my truck runs perfect with the sensor unplugged but of course no cruise control and annoying lights I've replaced the wiring and senor already anyone have any ideas? 

2001 h.o. 6 speed fass 150 edge juice with attitude 

AC noise issues... I would have the alternator tested for high AC noise. 

 

6 hours ago, Jammer2194 said:

Tracked my surging down to the speed sensor my truck runs perfect with the sensor unplugged but of course no cruise control and annoying lights I've replaced the wiring and senor already anyone have any ideas? 

2001 h.o. 6 speed fass 150 edge juice with attitude 

might want to hook up the speed sensor and disconnect the charging wire on the alternator and do a short test and see if the problem goes away.

thanks guys I'll be sure to try that out 

Replaced alternator working great now thanks guys!

Now you got to ask why did the alternator fail?

 

Bad cables or weak batteries can too. So if you don't want to have never ending loop of changing alternator you might want to service this stuff. Grid heaters can cause the failure too by starting and idling excessively.

Thank you. I'll be sure to check that stuff out. Gotta keep those 2nd gens going.