HEY GUYS, IT IS 36 DEGREES WHERE I LIVE AND I WENT OUT TO START MY 2003 F250 7.3L AND WHEN I TURN THE KEY THE GUAGES ACT FUNNY AND THEN THE TRUCK WILL JUST WEEKLY TURN OVER BUT NOT START.THE LIGHTS ARE KIND OF DIM AND THE UNDER THE HOOD LIGHT WILL NOT COME ON.IS THIS A BATTERY PROBLEM OR ALTERNATOR OR SOMETHING ELSE. THANKS FOR YOUR HELP

 

Sounds like battery. It takes a lot of amps and voltage to turn these engines when cold so strong batteries are a must have.

 

I HAVE A BATTERY CHARGER,SHOULD I TRY TO CHARGE BEFORE PURCHASING NEW ONES .AND DO I NEED TO BUY 2 BATTERIES ?

 

Clean all your battery connections and grounds and stick the batteries on a charger. Loose/corroded cables can cause a no start also so don't overlook them.

 

THANKS FOR THE HELP.

 

Check your connections and clean them at your batteries and give them a charge and see what happens. Then take them and have them load tested. And yes change them in pairs (850 cca min).

 

YOU'RE TYPING IN CAPS LOCK.. PUSH IT and your text looks like this!

Sorry i couldn't resist

 

dose yours have a block heater?i have a 7.3l too but its a 95 and ive had that problem too