Topic: Shorts
in Forum: C3 Electrical
Already a Member?
Click Here to Login
Not yet a Member?
Click Here to Register for Free!
Lifetime MemberModerator
Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
Am-Fm/map light National/Regional/Chapter NCRS "Top Flight"
#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
Well...it were worth a shot. 
In the pic of your NSS, the two purple wires are for the starter. One of those wires comes from the ignition switch, and the other goes down to the inner terminal of the starter solenoid. If you have a multi-meter, check them for voltage with the key turned to "Start"...one of them should have 12v. If not, then your problem lies somewhere between the ignition switch and the NSS. If you do get 12v on one of them, then you can run 12v to the other terminal, and you should hear the solenoid at least click. If it does not click, or crank, then you need to make sure your battery cable is connected to the center terminal of the solenoid. With the 12v battery feed, and 12v on the purple wire, it has to crank. If it does NOT, then you have a starter, or solenoid problem.
Just to clarify, when checking voltage at the NSS, you'll need to be testing the vehicle harness side...not the switch itself. If it is unplugged, you will of course not have any power on any of the wires on the NSS.
|UPDATED|9/11/2012 9:39:49 AM (AZT)|/UPDATED|
In the pic of your NSS, the two purple wires are for the starter. One of those wires comes from the ignition switch, and the other goes down to the inner terminal of the starter solenoid. If you have a multi-meter, check them for voltage with the key turned to "Start"...one of them should have 12v. If not, then your problem lies somewhere between the ignition switch and the NSS. If you do get 12v on one of them, then you can run 12v to the other terminal, and you should hear the solenoid at least click. If it does not click, or crank, then you need to make sure your battery cable is connected to the center terminal of the solenoid. With the 12v battery feed, and 12v on the purple wire, it has to crank. If it does NOT, then you have a starter, or solenoid problem.
Just to clarify, when checking voltage at the NSS, you'll need to be testing the vehicle harness side...not the switch itself. If it is unplugged, you will of course not have any power on any of the wires on the NSS.
|UPDATED|9/11/2012 9:39:49 AM (AZT)|/UPDATED|
Joel Adams
C3VR Lifetime Member #56 
My Link 
(click for Texas-sized view!) NCRS
"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
SPONSOR AD:: (Our Sponsors help support C3VR)
I found that the interlock relay is located passenger side engine bay above heater core cover, their was a couple of ways people bypassed the relay.
1 they spliced the lt green wire to the purple wire behind the relay mount
2 was they would open up the relay and soldered the contacts inside
To start over if you have a test light I would do it this way
chk power at purple white wire at NSS no power back to ign sw
chk power at purple wire at NSS in park position or nuetral position no power NSS bad
chk power at Lt Green wire interlock relay NSS in position from last step no power maybe bulkhead connector or wireing
if interlock relay was bypassed you should have power at purple wire if no power issue is interlock circuit
chk power at starter S terminal closest to engine block if power since starter was changed you would have a grounding problem for engine block to frame to battery
here is the interlock diagram
Joel please double ck me
Former Member
Send PM
San Antonio, TX - USA
Joined: 8/18/2012
Posts: 53
Vette(s): Little on the rough side right now, with new paint and new interior it will be looking fine!
Found the problem... after the store sent me the wrong NSS, i cleaned up the old one and put it back on, i then took the starter off and had them test it, it tested good and they recomended checking the fuseable links in the line, after putting the starter back on and checking the one link on the wire going to the engine side of the starter she cranked up just fine... no idea how that was causing the problem...
http://www.C3VR.com/member_uploads/20201_20300/20243/5626/member_uploads/20201_20300/20243/562655_633142580793_114065104_n201332616294r.jpg55_633142580793_114065104_n201332616294r.jpg
I hope to one day be as knowledgeable as most the guys on here... but till then I'll have to just keep asking the questions with the obvious answers....
Lifetime MemberLemon Grove, CA - USA
Joined: 10/17/2007
Posts: 2041
Vette(s): 1982 C3 Collectors Edition 44000 miles, sat in the sun most of its life, My wife purchased it for me for Father's Day in 2007 from her girlfriend that had it for 19 years. It is on the road again. I'm retired but it is now my daily driver.
Did you ever see the movie Gremlins?
That apparently was your problem Gremlins. That is it.
By the way I learned a lot from following this post. As I'm sure others did.
That apparently was your problem Gremlins. That is it. By the way I learned a lot from following this post. As I'm sure others did.
in Forum: C3 Electrical
SPONSOR AD: (Our Sponsors help support C3VR)