Can a fuse (80) on the battery between the two terminals prevent the vehicle from starting?

If your Econoline E350 is experiencing a situation where the battery has power but nothing is lighting up or functioning, there could be a few potential reasons for this issue. Here are some steps you can take to diagnose and potentially resolve the problem:

1. Check Battery Connections: Ensure that the battery terminals are clean and securely connected. Loose or corroded connections can prevent electrical power from reaching the vehicle's systems.
2. Fuse Inspection: Examine the vehicle's fuse box for any blown fuses. A blown fuse could be causing the lack of power to certain systems. Refer to your vehicle's manual for the location and function of each fuse.
3. Ignition Switch: The ignition switch could be faulty, preventing power from being properly distributed throughout the vehicle. Try turning the key to different positions (like "On" or "Start") while observing the dashboard lights. If the lights flicker or come on briefly, it could indicate a problem with the ignition switch.
4. Battery Voltage: Even though the battery has power, it's important to check the actual voltage. A low voltage might not provide sufficient power to operate the vehicle's systems, even if the lights come on. A fully charged battery should read around 12.6 volts.
5. Starter Motor: If the starter motor is faulty, it could prevent the engine from cranking. Listen for any clicking sounds when you attempt to start the vehicle. If you hear a clicking noise, it could indicate a problem with the starter motor or its connections.
6. Ground Connections: A bad ground connection can disrupt the flow of electrical current in the vehicle. Check ground connections for corrosion or damage.
7. Electrical Issues: In more complex cases, there could be underlying electrical issues within the vehicle's wiring or control modules. These issues might require professional diagnosis and repair.
8. Key Fob or Anti-Theft System: If your vehicle has a key fob or an anti-theft system, it's possible that there could be an issue with their communication, preventing the vehicle from starting. Try using a spare key or check the owner's manual for troubleshooting steps related to the key fob or anti-theft system.

Hey! If your 2002 Nissan Xterra attempted to start without the keys in the ignition after replacing the starter, there may be an issue with the electrical system or the starter installation. Here are a few things you can check:

1. Wiring connections: Double-check the wiring connections on the starter. Ensure that the positive and negative cables are securely attached to the appropriate terminals on the starter. Make sure there are no loose or exposed wires.
2. Starter solenoid: The starter solenoid is responsible for engaging the starter motor when the ignition key is turned. It's possible that the solenoid is malfunctioning or wired incorrectly. Check the solenoid connections and wiring to ensure they are properly connected and in the correct configuration.
3. Ignition switch: It's unusual for a vehicle to attempt to start without the keys in the ignition. There could be an issue with the ignition switch or the wiring related to the ignition system. Inspect the ignition switch and its wiring for any signs of damage or loose connections.
4. Security system: Some vehicles have a security system that can prevent unauthorized starting. If your Xterra is equipped with a security system, ensure that it is not causing the issue. Refer to the vehicle's manual or contact a Nissan dealership for instructions on troubleshooting the security system.
5. Starter replacement: If all the wiring connections and components appear to be in order, it's possible that the replacement starter is faulty or incompatible with your vehicle. Consider double-checking the specifications of the new starter to ensure it is the correct model for your Xterra.

If you are unsure or uncomfortable with performing these checks yourself, it is recommended to consult a professional mechanic or contact a Nissan dealership for assistance. They will have the expertise and tools necessary to diagnose and resolve the issue with your Xterra's starting system.

Vehicle info ?

sounds electrical maybe a fuse needs replacing...and it may have now drained the battery.

We'll go from the more obvious to more complex:
- Is the battery charged
-are battery terminals clean
- are battery cables tight on ALL connections, including starter, ground
- Do the lights and accessories come on
- when ignition switch is turned to start, is there a clicking sound (this would be the starter solenoid engaging)
-Does vehicle have a security system that when engaged prevents it to start
- Did this problem exist before or did it just appear abruptly.
-check fuses
-put shifter lever in N -try to start( possible bad neutral safety switch)
-

You have a 40amp fuse for the key switch, and the main component on the 80amp circuit is the alternator.
I would disconnect the alternator, hook up the battery without the fuse, and use a test light across the 80amp fuse terminals to see if the short has been removed.

HERE'S 1996 OLDEST I HAVE. MAY BE SIMILAR.

Section 03-06A: Starting System, Gasoline Engines 1996 F-Series and Bronco Workshop Manual
REMOVAL AND INSTALLATION Starter Motor WARNING: WHEN SERVICING STARTER MOTOR OR PERFORMING ANY MAINTENANCE IN THE AREA OF THE STARTER MOTOR, NOTE THE HEAVY GAUGE INPUT LEAD CONNECTED TO THE STARTER SOLENOID IS HOT AT ALL TIMES.
Removal

1. Disconnect battery ground cable (14301).
   

1. Raise vehicle on a hoist. Refer to Section 00-02 .
   

1. Remove attaching bolts and starter motor shield.
   

1. CAUTION: When disconnecting hardshell connector at starter motor solenoid S terminal, grasp the plastic shell and pull off. Do not pull on wire. Be careful to pull straight off to prevent damage to connector and S terminal. If any part of connection is damaged, replace damaged components.
   Disconnect battery cable and push-on connector from starter solenoid.
   

1. Remove attaching bolts and starter motor (11001).
   

Installation

1. Position starter motor on engine and install upper attaching bolt.
   

1. Position ground cable and install lower attaching bolt.
   

1. Tighten attaching bolts to 20.3-27.0 Nm (15-20 lb-ft).
   

1. Connect starter solenoid S terminal wire. Be careful to push straight on and make sure connector locks in position with a notable click or detent.
   

1. Install battery cable and attaching nut on solenoid B terminal. Tighten nut to 9-13.5 Nm (80-120 lb-in).
   

1. Position starter motor shield and install attaching bolts.
   

1. Lower vehicle.
   

1. NOTE: When the battery has been disconnected and reconnected, some abnormal drive symptoms may occur while the powertrain control module (PCM) relearns its adaptive strategy. The vehicle may need to be driven 16 km (10 miles) or more to relearn the strategy.
   
   Connect battery ground cable.
   

It is a good idea (recommended) to disconnect the battery when working on electrical components. If you disconnected the batter, make sure the battery cables are secure on the terminals (clean terminals if necessary) - apply a terminal grease to prevent corrosion and acid build up. Also, check the connection on the alternator - it's very possible this may have been disturbed or disconnected by accident during the installation of wires. Part of your message says "my car won't start, I changed my water..." did you change your water pump? There may be a crankshaft and/or camshaft sensor near the water pump. Make sure that these are plugged in and secure. Check your ignition fuse in the fuse box, the starter relay(under the hood) and the fusable link,next to or near the battery, or starter. Check all electrical connection that may prevent the vehicle from starting.

that is the alternator and vehicle power supply fuse, did u jump this wrong? u will need to replace this fuse before the car will start.