Nutreul safety switch question

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zigs

zigs

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Desided to rewire my Dart. Old wiring was really hacked. I already had a after market harness (GM color code). No more connector through the fire wall. Sence I'm not using a Mopar Harness, how do the three wires from the NSS hook up ? Is it still outside wires to back up and middle to ground ? Or will I need a power source , a ground and split the remaining back up wire. Abody Joe ? You out there ? This is a console shift.
 
You will have to figure out how the new harness "works." Surely must have a "crank" wire from the ignition switch, so this goes to EITHER of the "push on" terminals on your start relay.

Now, to make the start relay actuate during crank, you must GROUND the remaining push-on terminal through the neutral safety switch.

The harness for the newer NSS/ backup switch comes up over the top of the trans, and splits off at the bulkhead connector, where the two backup switch wires feed through the bulkhead, and the NSS (center terminal) splits off and goes over to the remaining push-on terminal on the start relay.

EDIT---

THE BIG thing that is probably missing in your GM/ Mopar lashup, is you must provide a wire from the ignition switch from the old "ign2" (traditionally brown) resistor bypass circuit.

So you options on that score are......

If you are running a Mopar ignition switch, just run a new wire

EDIT to replace the brown bypass circuit. Goes from the IGN2 post on the ignition switch to the plus side of the coil, in other words to the coil plus side of the ballast resistor

If you are wiring an older car (54 pickup, etc) and running a non-Mopar ign switch, you can either

use a newer "Jeep" start relay which has an extra set of contacts

use a separate "bosch" relay actuated by the start relay

use a great big series diode from the crank signal (yellow) wire

The output of any of these options goes to the coil side of your ballast, for a "hot" start voltage during crank.


the backup switch section of the NSS (two outer contacts) will feed through your bulkhead. One wire must go to whatever is provided in your new harness for fused switched backup lights, and the other wire must end up going to the rear to feed the lamps.

Newer Jeep relay:

StarterRelay.jpg
 
67Dart273 said:
You will have to figure out how the new harness "works." Surely must have a "crank" wire from the ignition switch, so this goes to EITHER of the "push on" terminals on your start relay.

Now, to make the start relay actuate during crank, you must GROUND the remaining push-on terminal through the neutral safety switch.

The harness for the newer NSS/ backup switch comes up over the top of the trans, and splits off at the bulkhead connector, where the two backup switch wires feed through the bulkhead, and the NSS (center terminal) splits off and goes over to the remaining push-on terminal on the start relay.

THE BIG thing that is probably missing in your GM/ Mopar lashup, is you must provide a wire from the ignition switch from the old "ign1" (traditionally brown) resistor bypass circuit.

So you options on that score are......

If you are running a Mopar ignition switch, just run a new wire

If you are wiring an older car (54 pickup, etc) and running a non-Mopar ign switch, you can either

use a newer "Jeep" start relay which has an extra set of contacts

use a separate "bosch" relay actuated by the start relay

use a great big series diode from the crank signal (yellow) wire

The output of any of these options goes to the coil side of your ballast, for a "hot" start voltage during crank.


the backup switch section of the NSS (two outer contacts) will feed through your builhead. One must go to whatever is provided in your new harness for fused switched backup lights, and the other must end up going to the rear to feed the lamps.

Newer Jeep relay:

StarterRelay.jpg
Click to expand...

Thanks alot that should help. I think I was on the right track just needed some reasurance.
 
67Dart273, that was very helpful. Thanks for your excellent response to zigs' problem. You are one of the guys that give FABO a GREAT reputation.
 
FISHBREATH said:
67Dart273, that was very helpful. Thanks for your excellent response to zigs' problem. You are one of the guys that give FABO a GREAT reputation.
Click to expand...

You're welcome, but I did make one mistake---I incorrectly referred to "IGN1" which should be "IGN2" the bypass circuit
 
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