How do you replace a starter on a 72 chevy nova 307cu. motor. does the hot cable go to the starter and the blk to the ground which on my car is on top of the alt.

What is model year? Sometimes when you replace engine you may need the computer from donor vehicle as well? Any testing at starter motor make sure tranny is in park or neutral and parking brake is set.
Make sure battery has a full charge and connections all good? You can turn crank by hand, correct? The engine isn't seized? The starter motor usually has two voltage circuits, one comes from the battery, hot all the time. The other circuit goes hot with key in the crank position and may be wired through the neutral switch for automatic tranny. The starter motor usually grounds through engine block. So, grounds are important.
You can take starter motor off, lay it on the ground, hook up jumper cables properly from charged battery to starter motor, at the least, it should kick out drive gear and spin.

I'm assuming just by the fact you had a new battery and new starter that sometimes when you turn the key to the start position , nothing happens . Is your vehicle a automatic transmission ? When it doesn't start have checked for battery voltage at the starter solenoid S terminal ? Is there B+ voltage at pins 30 & 86 for the starter relay ? Pin 86 while cranking the engine or trying to crank the engine over . Pin 30 check with key on . Try moving gear selector to neutral . Videos on youtube for basic automotive electrical testing . How to voltage drop test starter motor circuit Find a wiring diagram at www.bbbind.com
Starting System Circuit Description
Voltage is applied at all times to the ignition switch from the IGN A fuse 6 through CKT 242 (RED). When the ignition switch is turned to the START position, voltage is applied to the CRANK fuse 8 through CKT 5 (YEL). From the CRANK fuse 8, voltage is either applied to the clutch pedal position switch (M/T) or the transmission range switch (A/T) through CKT 806 (PPL). When either the clutch is disengaged (M/T) or the transmission is in park or neutral (A/T), voltage is applied to the coil of the starter relay through CKT 1035 (PPL/WHT). Since the starter relay is permanently grounded at ground G105 through CKT 150 (BLK), the starter relay energizes.
Voltage is applied at all times to the starter relay contacts from IGN A fuse 6 through CKT 242 (RED). When the starter relay energizes, the starter relay contacts close, and voltage is applied to the starter motor solenoid. Since the starter motor solenoid is permanently case grounded, the starter motor solenoid will energize two coils. The pull-in winding coil energizes in order to pull the starter motor solenoid contacts closed. When the contacts close, a plunger on the contacts causes the pull-in winding coil circuit to open. The hold-in winding coil then holds the starter motor solenoid contacts closed. Voltage is then applied to the starter motor from the battery through CKT 1 (BLK) and the closed contacts of the starter motor solenoid. Since the starter motor is also permanently case grounded, the starter motor will run until the ignition switch is moved out of the START position. When this happens, a spring in the starter motor solenoid moves the starter motor solenoid contacts and the plunger back to the rest position.

buy it yourself cheaper Impala disc brake conversion


get rotors from
69-74 nova
70-72 monte carlo
67-72 chevelle
69-72 gto
69-72 grand prix
69-72 buick skylark
69-72 buick grand sport
69-72 buick apollo


use the bearing and seals for the car you u choose to get the rotors from


calipers
75-75 nova
73-76 monte carlo
73-76 chevelle
73-76 grand prix
73-76 GTO
73-76 tempest


must use original power brake booster from 61-64 impala

must use a master cylinder from 71-72 impala deep cup bendix part number 10-1496

71-80 gm combination valve

73 chevelle brake hoses

must buy brackets for the calipers, many places in super chevy magazine sell them cheaply!!!

on those vechiles the battery is located under the back seat so first pop the hood on the drivers side fender there will be a RED cap pull that off that is your HOT wire hook the red cable to that the blk one to any grounded sourse fender motor bracket ect... and of course red to the red on the battery of the other car and blk also

1. Disconnect the negative battery terminal and the starter motor cable at the positive terminal.
2. Remove the engine wire harness from the harness clip on the starter motor
3. Disconnect the cable from the B terminal on the solenoid, and the BLK/WHT wire from the S terminal.
4. Remove the starter motor by loosening the two attaching bolts.
5. To install, reverse the removal procedures: re-position the starter in place, replace bolts, tighten the starter-to-engine bolts to 32 ft. lbs. (45 Nm).
6. Make sure that all wires are securely connected.

REMOVAL PROCEDURE

IMPORTANT: This vehicle uses the PG260 F1 starter motor. The starter motor is serviced only as a complete unit.

1. Disconnect the battery ground (negative) cable from the battery.
2. Raise and suitably support the vehicle. Refer to Vehicle Lifting.
3. Remove radiator air baffle assembly.
4. Remove the starter motor BAT terminal nut and electrical leads.
5. Remove the starter motor S terminal nut and electrical lead.
6. Remove the torque converter co
7. Remove the starter motor bolts.
8. Remove the starter motor.

INSTALLATION PROCEDURE

1. Install the starter motor.
2. Install the starter motor bolts. Tighten the starter motor bolts to 47 N.m (35 lb ft)
3. Install the torque converter cover.
4. Install the starter motor S terminal electrical lead and nut. Tighten the starter motor solenoid S terminal nut to 3 N.m (27 lb in).
5. Install the starter motor BAT terminal electrical leads and nut. Tighten the starter motor solenoid BAT terminal nut to 10 N.m (89 lb in) .
6. Install radiator air baffle assembly.
7. Lower the vehicle.
8. Install the battery ground (negative) cable to the battery.

2 hour job from top driver side of engine.

Starter Motor WARNING: WHEN SERVICING THE STARTER MOTOR OR PERFORMING OTHER UNDERHOOD WORK IN THE VICINITY OF THE STARTER MOTOR, BE AWARE THAT THE HEAVY GAUGE BATTERY INPUT LEAD AT THE STARTER SOLENOID IS "ELECTRICALLY HOT" AT ALL TIMES. A PROTECTIVE BOOT IS PROVIDED OVER THIS TERMINAL ON ALL VEHICLE LINES AND MUST BE REPLACED AFTER SERVICING. BE SURE TO DISCONNECT THE BATTERY GROUND CABLE BEFORE SERVICING THE STARTER MOTOR.
Removal

1. Disconnect the battery ground cable (14301).
   

1. Remove the engine air cleaner (ACL) (9600). Refer to Section 03-12 for the removal and installation procedure.
   

1. Slide back the protective boot and remove the nut securing the battery positive cable on the B-terminal of the starter solenoid (11390).
   

1. Remove the battery positive cable from the B-terminal.
   

1. Disconnect the S-terminal electrical connector.
   

1. Remove the two starter motor bolts.
   

1. Remove the starter motor (11002) from the vehicle.
   
   

Unplug the wire to the horn and make sure you have the horn grounded really good. Take a hot wire and run it from the battery to the horn. touch the hot wire to the end of the horn and see if it works. If it does not work then you need to replace the horn. If the horn works then take a test light and hook it up to the horn wire and have someone push the horn down. you should have a hot wire. If you don't them check the horn fuse. Let me know if this works.

Starter Motor Removal

1. WARNING: WHEN SERVICING STARTER MOTOR (11002) OR PERFORMING ANY MAINTENANCE IN THE AREA OF THE STARTER MOTOR, NOTE THE HEAVY GAUGE INPUT LEAD CONNECTED TO THE STARTER SOLENOID (11390) IS HOT AT ALL TIMES. MAKE SURE THE PROTECTIVE CAP IS INSTALLED OVER THE TERMINAL AND IS REPLACED AFTER SERVICE.
   Disconnect the battery ground cable (14301). Refer to Section 14-01 .
   

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

1. Disconnect starter cables from starter solenoid.
   

1. Remove upper and middle bolt.
   

1. Remove lower bolt and starter motor.
   

Installation

1. Position starter motor to engine and install middle and lower bolts finger-tight.
   

1. Tighten the upper bolt to 20-27 Nm (15-20 lb-ft).
   

1. Tighten the lower and middle bolts to 20-27 Nm (15-20 lb-ft).
   

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

1. Install S terminal cable eyelet with washer and nut. Tighten to 4.5-6.5 Nm (40-57 lb-in).
   

1. Install starter cable nut to starter solenoid B-terminal. Tighten to 9-14 Nm (80-124 lb-in).
   

1. Replace red starter solenoid safety cap.
   

1. Lower vehicle to floor.
   

1. Connect battery ground cable.