Your battery is not charging due to a problem with the battery cables or a bad alternator.
You can turn off the seatbelt warning light in your 2006 Ford Explorer, by buckling the seatbelts. When the seat is occupied the warning light will stay on until the seatbelt is buckled.
This would normally mean a problem with the alternator. But it can also be loose for corroded connections.
Discounted the battery
I was looking at the 2006 Ford Explorer Owner Guide and the wrench light is the Powertrain Malfunction Indicator . It lights up when a powertrain or 4x4 fault has been detected , take it to the dealer
The wrench light in any car means your engine needs attention.
The wrench warning light can come on for many different reasons in your 2006 Ford Explorer. A Ford dealership can diagnose the problem. Make sure the oil doesn't need to be changed, that will cause it to come on.
behind the battery under the plastic cover. They will have empty slots where they would go. Unless you have the factory towing package.
what is the maintenance schedule for ford explorer 2006
means your abs (brakes) NEEDS REPAIR OR SERVICE
I was looking at the 2006 Ford Explorer Owner Guide and it does not show anything about it having a cabin air filter , so I would say NO
Try disconnecting the battery.
unplug the battery