my old starter was not working well. sometimes you had to hit it to get it to start. when i was hitting it i accidentally hit the posotive side and message it spark a bit. after several tried the starter went from click click top nothing at all. I figured the starter was done. I replaced it with a brand new one and nothing. no click click no cranking nothing. I replaced the starter relays but still nothing . I double checked the wires to make sure they were tight. why isn't the starter doing anything?

Ford F350 dully 6.0 liter 4x4

 

Could you tell us what this starter is in, it would help a lot.
Did you check the battery cable connections? Do the lights work? Some vehicles have fusible links in the wiring to certain parts of the vehicle, and some others have a high amp rated fuse in the supply system. Do you have access to a test lite or voltmeter?

 

i have double checked that the wires to the starter are tight. i have double checked the wires to the batteries are tight. i checked the fuses and have replaced the starter and main engine relay. the guages and radio etc. turn on like they should. everything seems to be normal. but no reaction from the starter.

 

Turn on the headlights and see if they dim when you try to start it.

 

Does this vehicle have any type anti-theft system?

 

yes it has a viper alarm system. which is an aftermarket alarm.

 

If the viper system is the problem, is there any way that you can by-pass that system to eliminate that possibility?
Not familiar with that system, is it just supposed to prevent it from starting or prevent the engine from running?

 

the alarm seen s to be operating properly. buff i will bypass out just to be sure.

 

How did you make out by-passing the alarm system?

 

nothing. by passed the alarm but still nothing. I searched the wires and could not find any in line fuses.