Can’t start ?
Lots of extra wires and interlocks as compared to 67 dart.
But the typical way a NSS works is when the trans is in park or neutral (neutral on a manual) the NSS provides a path to ground for the starter relay. Without that path to ground the relay can not engage and the starter will not spin.
You can do a few tests,
One is with the key in the run position is there 12v to one side of the ballast resister, 6 to 10v to the other side.
Second with the key in the start position is there 12v to both sides of the ballast resister.
Another is when the key is in the start position is there 12v to the "I" pin of the starter relay.
The "G" pin should be grounded when trans is in park or neutral. Open when in any other gear.
I'm not too familiar with the later cars, and there may be other interlocks like, seatbelt, etc. that interrupt the starter relay path from either the power side or the ground side.
Lots of extra wires and interlocks as compared to 67 dart.
But the typical way a NSS works is when the trans is in park or neutral (neutral on a manual) the NSS provides a path to ground for the starter relay. Without that path to ground the relay can not engage and the starter will not spin.
You can do a few tests,
One is with the key in the run position is there 12v to one side of the ballast resister, 6 to 10v to the other side.
Second with the key in the start position is there 12v to both sides of the ballast resister.
Another is when the key is in the start position is there 12v to the "I" pin of the starter relay.
The "G" pin should be grounded when trans is in park or neutral. Open when in any other gear.
I'm not too familiar with the later cars, and there may be other interlocks like, seatbelt, etc. that interrupt the starter relay path from either the power side or the ground side.
