91 Camaro RS, 3.1liter.
Installed new tilt steering pins. I have power to starter. Good battery. When I turn ignition, no crank. When I turn key to on position and jump the purple wire coming out of firewall in engine compartment...engine cranks and starts. I believe that since that happens, my problem is not with VSS but not certain. If I can jump from the purple wire, the Neutral Control Switch is working. The actuator arm coming down column is moving when I turn key to crank. Thanks for input

 

I have 12volts on red wire in column. When I turn key in crank position the yellow wire gets power, power not reaching purple selenoid wire by firewall. I checked starter, and is good

 

Only 2 things are between the ign sw and the solenoid. Those are, the neutral (or clutch, if it's a manual) safety switch, and the starter relay.

Check at those 2 places.

 

Thanks for the help. I found the starter relay on drivers side floor. Ordered a new one. Yes, the Camaro RS that I am working on is an automatic with the 3.1 liter V6, crossfire. I am going to you tube how to check the NSS.
By what you are saying. The NSS is after the ignition yellow wire in secquence of the crank circuit. As well as the starter relay. I have looked at a ignition wire diagram, but cannot follow the order and where each componet is that could block my voltage. After I replace the starter relay and test the NSS, I will give update. I would like to know where the yellow ignition wire turns to purple???
Thanks

 

The NSS

You can just follow the wiring and check the voltage when you turn the key; 12V should appear on both sides of the relay, then on both the yellow & purple at the NSS. Wherever the voltage goes away, is where the problem is.

 

make sure you have the rod from the key tumbler to the ignition switch connected correct.
I would think that having the steering column apart, (assuming that ti started before the work) that the issue in in the column, meaning that i would look at these
1st, make sure all connectors are right and something did not break when taking it apart or putting it back together.
2nd, the rod from the tumbler to the switch is moving the switch fully to the start position.
3rd, make sure you ignition switch is good, maybe do this 1st, remove the switch from the side of the column and you can start the car from there. - if the car stars like this then the issue is with the rod from the key tumbler to the switch.
remember that where you put the key in the column is only a locking device, and the actual "switch" is down on the lower column where the wires connect, they are a dirty white/cream color.

 

With all due respect, and not being a know it all or nit picking here;

The "crossfire" was a V8 thing only, your 3.1L V6 is an "MPI" system.

From an internet search of "was the crossfire used on V6 engines";

"GM's Cross-Fire Injection system was exclusively used on V8 engines, specifically the 5.0L (LU5) in some 1982-83 Camaros/Firebirds} and the 5.7L (L83) in the 1982 & 1984 Corvettes, bridging carburetion and modern injection before being replaced by TBI/MPI}.
Key Details:

• Engines Used: It appeared in the 305-cubic inch (5.0L) LU5 and the 350-cubic inch (5.7L) L83, both V8s.
• Vehicles: 1982-83 Chevrolet Camaro/Pontiac Firebird (305ci) and 1982, 1984 Corvette (350ci).
• System Type: A throttle-body injection (TBI) system with two throttle bodies, designed to improve performance and efficiency over carburetors. "

 

According to this 1991 Camaro service manual drawing for a V6 if you're losing power from the Yellow to Tan wires the problem is with the starter relay. One other item to note here is that by jumping straight to the purple wire you are also bypassing the start contact on the ignition switch so check that out as well.


If you're losing power between the Tan and the Purple wires then you issue is in the Neutral Start Switch.

 

Good luck

 

Thanks to all that have relpied, first and foremost. Yes I had the column apart to replace the tilt pins. After reassembly, I have NO crank.
#1 replaced battery
#2 bought new starter relay that was on inside driver rocker panel.
#3 when I turn the key to crank position I have 12v coming from the yellow wire that is coming from tje bottom of the steering column when key turned, not before
#4 with key in run position, and I jump the purple wire in the engine compartment going to the starter, the engine cranks and runs

Now here is where I am lost...
how do I check the NSS?
It will not crank, no matter what gear the selector is in
If I had a problem with the VATS system, the engine should not be able to run because the injectors would not get power...correct?

 

This is from the 1991 Camaro service manual.PARK-NEUTRAL-BACKUP LAMP SWITCH

See Figure 8

1. Remove or Disconnect

1) Negative (-) battery cable.

2) Console.

3) Mounting bolts (819).

4) Switch (817).

Switch Adjustment Using Old Switch

2. lnstall or Connect

• · Place shift control lever in "NEUTRAL."

1) Carrier tang (818) on switch (817) with tang slot (824) on shift control.

2) Mounting bolts (819) to case, loosely.

• Rotate switch (817) to align service adjustment hole with carrier tang hole.

3) Gage pin (820) 2.34 mm (3/32 inch) into service adjustment hole and rotate switch (817) until gage pin (820) drops to a depth of 15 mm (19/32 inch).

3. Tighten

• Mounting bolts (819) to 2 N · m (18 lb. in.).

4) Console.

5) Negative (-) battery cable.

Important

- After switch adjustment, verify that engine will only start in "PARK" or "NEUTRAL" If engine will start in any other position readjust the switch.

Switch Adjustment Using New Switch

1) Install or Connect

• Place shift control lever in "NEUTRAL"

1. Carrier tang (818) located on switch (817) into slot on shifter.

2. Mounting bolts (819).

Tighten

• Bolts (819) to 2 N ·m (18 lb. in.).

Important

- If bolt holes do not align with shift control verify shift lever is in "NEUTRAL" position. Do not rotate switch. Switch is pinned in the "NEUTRAL" position. If switch has been rotated and the pin is broken the switch can be adjusted using the "Switch Adjustment Using Old Switch" procedure.

3. Console. Refer to INSTRUMENT PANEL, CLUSTER AND CONSOLE (SEC. 8C).

4. Negative (-) battery cable.

You should be able to back probe the switch conductors to check it electrically I hope, since I haven't had to check mine.

 

Thank you to all that have replied.
I needed a new starter relay. The connectors in the NSS were dirty as all get up. I cleaned the connections on both sides with electric cleaner and small brush.
All is good in the RS today
Peace and love to all, I am sure that I will help in the future. I am doing a restoration, floor pans, suspension, little engine work, body work and paint.
I will post some pics. I put in new dash pad, carpet, door panels, head liner. I will need some help on seats though. Been a tough time locating.
Rug-black
Door Panels- Charchoal
Dash- black
Headliner- Charchoal
All plastics- Light gray
Thanks