Loose coil around battery

Question edited for clarity and toss in some CAPS.

There is nothing that backs up memory. When you disconnect the battery, all memory is lost, which is why it is important not to do it!

You don't tell us the model? Is it a secret? All questions need 'year make model' as the FIRST 3 words.

If your have a 1999 Infinity I30, the ECM Fuse is Fuse 58.

58 10 Engine Control Module (ECCS), Mass Air Flow Sensor, Crankshaft Position Sensor, Idle Air Control Valve (IACV-ACC) Solenoid Valve, Ignition Coils, EGR, EGR Volume Control Valve, EVAP Control System Pressure Sensor

Infiniti i30 (A32; 1995-1999) fuses and relays

Fuse Box Diagrams https://fuse-box.info > infiniti > infiniti-i30-a32-1995-...

Fuse box diagrams (location and assignment of electrical fuses and relays) Infiniti i30 (A32; 1995, 1996, 1997, 1998, 1999).

Infiniti i30, i35 (A33; 1998-2004) fuses and relays

Fuse Box Diagrams https://fuse-box.info > infiniti > infiniti-i30-i35-a33-1...

Fuse box diagrams (location and assignment of electrical fuses and relays) Infiniti i30 / i35 (A33; 1998, 1999, 2000, 2001, 2002, 2003, 2004).

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Principles of Operation
The convertible top will only operate with the parking brake engaged and the ignition switch in the RUN position. When the parking brake is engaged, the raise and lower relay coils are grounded through the parking brake switch. The convertible top switch supplies power to the raise or lower relay coil when raise or lower is selected. This power energizes the coil causing the relay contacts to close which supplies battery power to the convertible top motor/pump assembly. The normal state of the relay is connected to ground. When the raise or lower relay is operating, the other relay remains in its normal state supplying the motor/pump ground.

Inspection and Verification

1. Verify the customer concern by operating the system.

1. Visually inspect for obvious signs of mechanical or electrical damage.
   
   Visual Inspection Chart Mechanical Electrical
   • Door and quarter window glass adjustment.
   • Convertible top brackets and frame.
   • Hydraulic motor and pump.
   • Hydraulic lift cylinders.
   • Central junction box (CJB) Fuse 20 (15A).
   • Battery junction box (BJB) circuit breaker CONV TOP (25A).
   • Wiring harness.
   • Loose or corroded connections.
   • Raise or lower relays.
   • Parking brake switch.
   • Convertible top switch.

1. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.

1. If the concern is not visually evident, verify the symptom and refer to the Symptom Chart.

Park, Tail and Marker Lamps
The park, tail and marker lamps, including the license lamps, are turned on when the headlamp switch is placed in either the PARK or HEADLAMP position, or anytime the headlights are requested. The PARK LPS fuse in the underhood fuse block, supplies battery positive voltage to both the park lamp relay switch contacts and park lamp relay coil circuit. The park lamp relay coil is controlled by the body control module (BCM). When the headlamp switch is placed in the PARK position, the BCM will then energize the park lamp relay coil control circuit. Current flow is now from the park lamp relay to the park/tail lamps. The front park lamps are grounded at G100 and G101. The rear park lamps are grounded at G401 and G402. The license plate lamps are a part of the rear park lamp circuit and are grounded at G401. The inadvertent power control feature prevents the park lights from remaining on more than 10 minutes if left on. If the park lights are turned on after the ignition switch has been turned OFF, or is in the ACCY position, they will remain on until turned off or the battery runs dead.

20
PRK LPS
15A
PRK LPS Relay 55 under hood fuse box . Should have diagram on inside of the fuse box lid .

their are some electrical issues with s320 throttle valve electric failure --coil pack failure -- check fuses and relays then check battery and connections and try to start with boost if starts check and test battery and alternator --and check the wiring connections for loose , frayed , damaged ,and corrosion the following link are some of the problems acossiated with your vehicle
Newest Problem Reports for the 1999 Mercedes Benz S320

If the relay had been loose in the fuse box that can cause the melting. i've seen fuse panels where the conectors are actualy loose in the box so as you push relay in it is actualy forcing the connector out the bottom of the box. use a small screwdriver to push down gently on each connector in the fuse box to see if this is whats happening. relay are plentiful at the local wrecking yard or buy new. the either work, dont work os sometimes stick on. this will cause battery drain overnight . if the connector is loose in the box you'll have to lift the whole fuse box to try to push it back in. if it wont stay in the fuse box may have melted and will need replacing unless u can handle moving all the wires to another relay spot if the box will allow it

have you check the plug at the right strut tower? the plug comes loose and it causes the car not to start. one thing to do is check for power and ground pulse at the coil. also check the ignitor in the distributor to make sure it is sending signal to the coil.

On the negative battery terminal there is a black box with several small wires going to it. This has the relay grounds for several relays, including the PCM and fuel pump relay. If this box is not perfectly grounded, you won't get power to the PCM. I think this will be your issue since this happened after you replaced the battery, so you would have needed to remove that cable. It goes between the bolt and terminal end, make sure it is clean between there. Otherwise, you are going to have a bad PCM fuse or a bad PCM.

Most likely the ignition coil assembly, in some cases the ignition module is faulty.

Did you Check for Power (Voltage) before the Electronic Ignition Coil?
There is an electrical connection plugged-in and is located to the rear of the Ignition Coil. Slide the clasp lock (colored red) out and push of the clasp release and pull off the connection. Check for Voltage. If there is Voltage at this electrical connection but no spark after the Coil then the Coil needs to be replaced. However if there is no Voltage at this connection, then check the Automatic Shutdown Relay located in the IPM Fuse and Relay Box located on the left side (your right side) of the engine compartment.. Remove the Cover. The identification and location of the Fuses and Relays should be on the back (inside) o fthe Cover. You should have a Spare Relay in that Box. Switch out the Spare and the Automatic Relays. If no Spare then use a Relay from a non-engine operation Relay that is the same Type (size and shape) replug-in the electrical connection at the Coil and check operation. Unplug the Coil connection and again check for voltage.
There are also numerous Sensors that come into play dealing with the engine operation. However one Sensor will prohibit any spark from being sent to the Coil. If the Crankshaft Position Sensor is faulty or not sending information to the computer it will, there will be no voltage sent to the Coil. The Crankshaft Position Sensor is located on the rear of the engine, next to and on top of the the area of the transmission bell housing. Remove the Battery and Battery Tray to gain access. There should be a cluster of wires going on top of the transmission and going towards the rear of the vehicle. There should be two (2) wires coming out of that wire cluster, going to the left (your left) toward the engine block in the area of the transmission bell housing. The Crankshaft Position Sensor is bolted onto the engine with a 10mm bolt. Unplug the Sensor (using the above technique). Reconnest the Battery (no need to put in tray). Crank the engine and check for voltage coming out of the Sensor (not the connection) It should be around 5 volts. If NO Volts are received: remove the bolt, and pull the Sensor straight out. There should be a paper spacer on the new Sensor. Leave this paper spacer on there.
This should get you started or even (possibly) fixed.
Let me know if this helped, or if you have additional information or questions. Feel free to conatct me at FixYa.com!

For the 03 Chevy Venture you have to do the following to replace the battery.

1. Remove the windshield whiper motor cover
2. Remove the screw retaining the underhood fuse/replay panel to the fender brace. Disconnect the cable from the negative termainal.
3. Detach the fuse/relay panel from the fender brace and move it aside. Remove the fender brace.
4 Disconnect the cable from the positive battery terminal