It souds simple but I do not know if certain cables have certain voltage requirements.
The starter or battery cables/terminals are corrode.
How do you remove and replace the battery on a 2001 Ford F150?
check your battery cables. could be old or just loose.
On the 6 cylinder it's on the lower part of the passenger side (US) of motor. Most rear drive vehicles have the starter on the right or left side of the motor, just follow the battery cables down.
blinker blubs on a 1997 f150 front blubs
check your starter or starter relay.
To change the battery in a Ford (2005) F150 pickup truck - one needs to open the hood and identify where the battery is. It should be on the passenger side, right next to the chassi. You need to disconnect the positive and negative leads and unscrew the bolts holding the battery. You then can replace the battery using the same setup.
Disconnect and remove the battery. Cut off the spoiled terminal and replace. Replace battery. Reconnect.
Just follow the cables to your strater and take off the nuts holding them in place. You will have a negative ground going to the firewall. Take that bolt off then follwo the smaller lead off from your positive to the firewall and remove that. Reach through your fenderwell and you will see where the cables are clamped to to a bracket that is bolted to the frame. Unbolt that one and your done. Takes about 30 minutes.
Cables clean and tight on the battery? If so probably the starter solenoid. (Older F150s located just behind the battery on the passenger inner fender).
Assuming both battery cables are fastened securely at both ends, look for a burnt-out fusible link.
I had this problem in my 1990 Ford F150. The battery cables were bad and weren't carrying the charge from the alternator to the battery