2005 F-250 King Ranch 5.4 won't crank
 

hi...i have a 2005 f-250 5.4 triton engine...my problem occurs when i turn the key to start the pickup....i get a clicking sound and then nothing....when i use a portable jump starter, it fires right up...on the other hand, when i try to jump from a running vehicle i only get a clicking sound from the starter...

not sure what i should be testing...also, when i bought the vehicle it had been sitting for several months...for my test drive, they used a commercial charger/starter to fire the truck...i drove it about 10 miles, stopped, turned off the motor and 10 minutes later it wouldn't start...when i contacted the owner, he drove to me and "reset" the kill switch under the fuse box in the cab and then jump started the truck...i drove it 40 miles home and for 4 days had no starting issues...on day 5 forward, i have had to use the portable jump starter every time...my battery shows 13 amps resting and drops to 5 amps when i try to start without portable jump starter...when i start it with the portable jump starter, it only drops to 10 amps...

thanks in advance for any insight...

tom

you mean volts not amps?

you are correct sir...volts not amps...thank you

Maybe just toss a new battery in to take that out of the equation?

JC

not if the old one is reading 13 volts

maybe try cleaning your connections and make sure they are tight

Battery checked out by autozone as o.k....whats weird is that is cranks right over with the portable jump start but won't even crank a little bit with a jump start from another vehicle....matter of fact, i swapped batteries out with a new one my friend has and same problem...but again cranks right over with the portable...i

ty for replying

thanks Hotpocket...the connections look good, but in another forum i read where looks can be deceiving when it comes to battery cable connections....so with that said, i am going down that road first thing in the morning....especially since i don't have to dive into my wallet...again...

what do you know about kill switches and their potential problems?

i appreciate your replies...ty