see if there is power at head light plug maybe headlights are burned out
On some if you put the battery in backwards the clock will run backwards.
I recently replaced the battery in our 1998 Windstar and did not keep the electrical system connected during the changeover. No issues afterwards.
I'm sorry if this sounds silly, but did you put the battery in backwards?
You cannot charge it connected backwards. You will destroy the battery.
You could have a short in your electrical system, your battery might need a charge or be replaced.
Its to the left sidewall where the battery is
Connecting a battery charger backwards to a battery will likely kill the battery, depending on how long the power is attached.
To replace the camshaft position sensor on a 2005 Nissan Pathfinder, first, disconnect the negative battery terminal to ensure safety. Locate the sensor, which is typically found near the camshaft on the engine. Disconnect the electrical connector and remove any mounting bolts holding the sensor in place. Install the new sensor, secure it with bolts, reconnect the electrical connector, and then reattach the battery terminal.
Alternator
A battery is only an electrical storage device. If the battery is faulty it will not be able to store electrical energy. On the other hand, if the battery is ok, it could be discharged because the alternator cannot create sufficient energy to keep the battery charged. If you are able to charge the battery the problem is in the alternator or an electrical connection. If you can't charge the battery, go ahead and change it. However, replacing a good battery will only make the vehicle run briefly. If the charging system isn't working a new battery won't solve the problem.
Sparks plugs are replaced by disconnecting the battery, removing the spark plug cable and boot, and by removing the old spark plug. Next put in the new spark plug, attach the boot and cable and reconnect the battery.
When replacing the battery on my son's Kawasaki Vulcan 500, I accidentally hooked up the battery backwards. I had purchased an EverStart battery from Wal-Mart and the orientation of the main battery terminals was backwards from the original battery. Anyway, it blew the main fuse located in the left hand side side cover.