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Check the battery for water level.
Get a hygrometer and check the battery cells.
Disconnect all the new electrical appliances you just installed.
Disconnect, clean up, and re-connect the battery cables.
Put a charger on, and fully re-charge the battery.
Then see if the truck starts and runs.
If it does, and you've got an alternator light that stays on at that point, get the alternator checked.
Good luck.
Keep us informed.
Dave
Westminster, MD USA
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