I put neutral an positive cables together now it

The red one goes to the positive. the other one goes to Negative on the battery.

Trying disconnecting battery, both negative and positive and hold them together for about 2 min or so then put them back on.

Remove: Take Negative cable off first, then positive.
install: positive on first, then negative.

OKmheres what i did and it worked- 1-take battery out and charge fully 2-Put battery back in car but put positive battery cable on first-dont tighten up yet 3-put negative battery cable on battery dont tighten yet 4-wait 2-minutes 5-take positive cable end off,ho;d in hand 5-take negative cable end off battery ,hold this in other hand 6-now hold both cable end together for 30-seconds -now put battery cable back on battery-make sure you put Positive cable back on First,then negative cable next-tighten both up-Now go see if dash lights are on-then it should start!! if not,repeat cable procedure

ignition off remove pos. and negative battery terminlas hold both cables do not touch the battery both cables touch them together and hold for 5min. then reconnect battery start engine codes cleared id it a hard code it will come back on

It could be a bad ignition switch or bad starter wire from the starter switch, or the PNP is not adjusted correctly:

Here are instructions on how to remove and replace the PNP, but read over it to understand how to adjust:
Park/Neutral Safety Switch REMOVAL AND INSTALLATION ES300 1993-94 Models

1. With the ignition switch in the LOCK position, disconnect the negative battery terminal. If equipped with an air bag system, wait at least 90 seconds or longer before performing any other work.
2. Raise and safely support the vehicle.
3. Disconnect the Park/Neutral switch connector.
4. Remove the clip from the shift control cable.
5. Remove the nut and control cable.
6. Remove the bolts and pull out the Park/Neutral switch. To install:
   
7. Install the Park/Neutral switch and loosely install the bolts.
8. Adjust the switch and torque the bolts to 48 inch lbs. (5 Nm).
9. Install the control shaft lever.
10. Install the control shaft cable and torque the nut to 9 ft. lbs. (13 Nm). Fig. 1: The transaxle control shaft lever has a nut and washer to retain it - 1993-94 ES300
    Fig. 2: Removing the Park/Neutral switch - 1993-94 ES300
    
    
11. Install the clip to the shift control cable.
12. Lower the vehicle.
13. Connect the negative battery cable.
14. Make sure the vehicle will start only in the PARK or NEUTRAL position.

1995-97 Models Fig. 3: Aligning the neutral base line and groove - 1995-97 ES300
Fig. 4: Park/Neutral switch removal and installation - GS300, LS400, SC300 and SC400
Fig. 5: Park/Neutral switch adjustment - GS300, LS400, SC300 and SC400

1. With the ignition switch OFF, disconnect the battery cables, negative terminal first. Allow 90 seconds to elapse before performing any other work.
2. Apply the parking brake fully and block the rear wheels.
3. Disconnect the electrical connector from the Park/Neutral position switch.
4. Remove the locknut and disconnect the control cable from the manual shift lever.
5. Remove the clip from the holding the control cable to the bracket.
6. Remove the nut, washer and the manual shift lever from the manual valve shaft.
7. Using a flat bladed tool, bend the lock washer back away from the nut.
8. Remove the nut and lock washer from the Park/Neutral switch.
9. Remove the two bolts and the Park/Neutral position switch. To install:
   
10. Install the Park/Neutral position switch to the manual valve shaft. Leave the two bolts loose at this time.
11. Install the lock washer and nut. Torque the nut to 61 inch lbs. (7 Nm).
12. Using a flat bladed tool, bend the lock washer over the nut to secure the nut in place.
13. Adjust the Park/Neutral as follows:
    1. Install the manual shift lever to the Park/Neutral switch and set the shift lever to the neutral ( N) position.
    2. Align the groove and the neutral basic line on the Park/Neutral switch.
    3. Hold the Park/Neutral switch in this position and tighten the two bolts to 48 inch lbs. (5 Nm).
14. Install the manual shift lever with washer and nut.
15. Install the control cable to the manual shift lever and install the nut. Torque the nut to 11 ft. lbs. (15 Nm).
16. Install the control cable to the bracket by installing the clip.
17. Connect the electrical connector to the Park/Neutral switch.
18. Lower the vehicle and check the vehicles shifting positions.
19. Connect the negative battery cable to the battery.
20. Verify that the vehicle only starts in PARK or NEUTRAL.

GS300, LS400, SC300 and SC400

1. With the ignition switch OFF, disconnect the battery cables, negative terminal first. Allow 90 seconds to elapse before performing any other work.
2. Raise and safely support the vehicle.
3. If necessary, remove the front exhaust pipe.
4. Disconnect the neutral start switch connector.
5. Remove the control shaft shift lever.
6. Pry off the washer and remove the nut.
7. Remove the bolt and pull out the neutral start switch. To install:
   
8. Install the Park/Neutral switch and loosely install the bolt.
9. Adjust the switch as follows:
   1. Loosen the neutral start switch bolt and place the shift lever in the N position.
   2. Align the groove and the neutral basic line.
   3. Hold in position and tighten the bolt to 9 ft. lbs. (13 Nm).
10. Install the nut and washer.
11. Install the control shaft shift lever.
12. Connect the electrical connector.
13. Install the front exhaust pipe. Torque the front nuts to 46 ft. lbs. (62 Nm). Torque the pipe support bracket to bolts to 32 ft. lbs. (43 Nm). Torque the No. 2 front exhaust pipe to the front exhaust pipe bolts to 32 ft. lbs. (43 Nm).
14. Lower the vehicle.
15. Connect the negative battery cable to the battery.
16. Verify that the vehicle will only start in the N or P positions.

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Maybe try to press the brake pedal and run the gear shift throughout the full range of gears while the car is on level ground, and retry the starter to see if there is a faulty PNP adjustment.

Try to start in Neutral not Park, and jiggle the gear shift back and forth to see if the PNP is not adjusted right.

Good luck on this repair.

the neutral safety switch (Park/Neutral position switch) is located to the right of the transaxle range switch on the front of the transaxle, just above the fluid pan.

1. Disconnect the negative battery cable.
   
2. Safely raise and support the vehicle.
   
3. Disengage the electrical connector from the switch.
   
4. Unscrew the switch from the transaxle case.
   

To install:

1. Position a new seal washer, then screw the switch into the transaxle case.
   
2. Attach the electrical connector to the switch.
   
3. Lower the vehicle.
   
4. Connect the negative battery cable.
   

Series or paralell?. Should be parallel so you get 12 v0lts. two positives together and two negatives together

Neutral Safety/Back-up Light Switch

This is a combination switch which controls both Neutral Safety and Back-up lamp circuits.

C6 Transmission



C6 neutral start switch

1. Disconnect the negative battery cable.
2. Raise and safely support the vehicle on jackstands.
3. Remove the downshift linkage rod return spring at the low-reverse servo cover.
4. Coat the outer lever attaching nut with penetrating oil. Remove the nut and lever.
5. Remove the 2 switch attaching bolts, disconnect the wiring at the connectors and remove the switch.
6. Installation is the reverse of removal. Adjust the switch and tighten the bolts to 55-75 inch lbs. (6.2-8.5 Nm).
7. Remove the jackstands and lower the vehicle.
8. Connect the negative battery cable.

AOD Transmission



Removing the AOD neutral start switch

1. Disconnect the negative battery cable.
2. Raise and safely support the vehicle on jackstands.
3. Disconnect the wiring from the switch.
4. Using a deep socket, unscrew the switch.
5. Installation is the reverse of removal. Tighten the switch to 10 ft. lbs. (14 Nm).
6. Remove the jackstands and lower the vehicle.
7. Connect the negative battery cable.

4R70W Transmission




Removing the Manual Lever Position (MLP) sensor

As of 1994, the neutral safety switch is referred to as a Manual Lever Position Sensor (MLP).

1. Disconnect the negative battery cable.
2. Raise and safely support the vehicle on jackstands.
3. Disengage the harness connector from the MLP sensor.
4. Remove the 2 sensor attaching bolts and remove the sensor.

To install:

1. Install the MLP sensor and install retaining bolts. Do not tighten, the sensor requires adjustment.
2. Adjust the MLP sensor then tighten attaching screws to 80-100 inch lbs. (9-11 Nm).
3. Remove the jackstands and lower the vehicle.
4. Connect the negative battery cable.

ADJUSTMENT

C6 Transmission

1. Hold the steering column transmission selector lever against the Neutral stop.
2. Move the sliding block assembly on the neutral switch to the Neutral position and insert a 0.091 in. (2.3mm) gauge pin in the alignment hole on the terminal side of the switch.
3. Move the switch assembly housing so that the sliding block contacts the actuating pin lever. Secure the switch to the outer tube of the steering column and remove the gauge pin.
4. Check the operation of the switch. The engine should only start in Neutral and Park .

4R70W Transmission




Adjusting the MLP sensor

Park is the last detent when the manual control lever is full forward. Return 2 detents toward the output shaft for Neutral.

1. Position the manual control lever in Neutral .
2. Insert Gear Position Sensor Adjuster tool T93P-700 10-A or equivalent, into the slots.
3. Align all 3 slots on the MLP sensor with 3 tabs on the tool.
4. Tighten the attaching screws to 80-100 inch lbs. (9-11 Nm).

I hope help you. Good luck (rated this help).

disconnect and clean with baking soda and water solution, cable could be corroded inside, must be replaced, start early sat morning with new cable in hand 

Sounds like a newer 5 series. The SZL module located in the steering column has failed. Most common indication of this failure is the wipers being stuck on. Unit will need to be coded by a professional. Just for fun you can try a memory dump: remove negative battery cable and then positive battery cable and touch them together for 30 minutes then reconnect everything and hope for the best. If the cables are too short to reach each other slide a screwdriver in through the negative opening and into the positive opening. MAKE SURE NEGATIVE CABLE DOESN'T TOUCH THE POSITIVE CABLE WHILE IT IS CONNECTED TO THE VEHICLE.