2002 7.3 will not turn over

[Usmcdroach]

I have a 2002 7.3 dually 4x4 I just bought I turned the truck over by hand the. Hooked up a jumper box and the truck slowly turned over but never started . I bought the truck got it to my friends shop charged the batteries and now nothing . The light come on the dash and when you turn the key nothing . I replaced the starter still nothing there was an aftermarket alarm on the truck I removed the power wire does that matter? Also I have read some things about a starter interrupt and ways around it . I am going to get some shut eye the. Be at the truck in a few hours . If you have any Possible things for me to check please let me know as I need this truck running soon

[jesilvas]

What light came on in the dash? All, some? When you turn the key there is no click or nothing nothing?
That wire depends on the alarm system. You'd have to check with the manufacturer.
It could be weak batteries still. You need at least 850CCA batteries that BOTH load test good individually. On the pass fender inner wall there is a starter solenoid. You can try bridging the terminals and if it starts, then that's something. Could be a neutral safety switch, key tumbler, wires in the column, bad starter solenoid, many, many things.

[Turbostang500]

Agree with above. Way too many things can be wrong.
need more details. Remember, we cant see or hear anything where we are so you are the eyes and ears.

Also, what kind of weather/temps are you experiencing this time of yr?

[Usmcdroach]

All the lights on dash come on and everything works liked exterior lights and radio and so on but turn the key to start and nothing no click no nothing batts test good and are both charged and the starter is new I will check some other thing as soon as I get to the truck and turbostang thankfully the weather has been warm and no snow because this is my plow truck

[jesilvas]

Well that's a good start.
I'd go checking every single fuse just to be sure cause something is not allowing the starter solenoid to be engaged, which is usually electrical. So fuses first. Then bridge the two posts to see if it will turn over. You can leave the key on so that if it does turn over, then it can start and stay running.

[Usmcdroach]

I will check fuses also do you know if I just unhook the alarm will that do anything it's not factory?

[Turbostang500]

I cant help you on the alarm question.

On the starter solenoid, there should be the 2 big wires and a smaller wire.
Check the smaller wire for 12 volts when the key is turned to start.

[Jerry@tx]

look for the starter kill relay on the alarm. connect the two big wires coming off the relay together.

[Jerry@tx]

Or replace the alarm starter kill relay if the alarm still works. 5.99 at autozone or any parts store.

[Jerry@tx]

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