how to use the factory neutral safety switch on 4l80e ?
02-05-2015, 12:28 PM
#1
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how to use the factory neutral safety switch on 4l80e ? 
I have a standalone harness that I made using a current performance fuse block, (the motor and trans are out of 05van), after everything was hooked up, still have 3 wires that are left, pins 1, 9, and 10. I belive pin 10 is for back up lights, (is it power or ground? ), pin 9 is for "park/neutral position switch signal" ( is this to be grounded or powered or connected to what?), Pin 1 "says clutch start switch signal"(wtf? Clutch? Doese anything get done with this wire?)
I want to use this transmission mounted switch with the current harness, instead of the factory switches on car.
The prndl/nss plug
The finished current harness
Last edited by slocaddy; 09-02-2016 at 02:56 PM.
02-05-2015, 06:09 PM
#3
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Thanks for the reply nova, I want to use the cars ignition switch as it new, but it's nss is currently jumped (just kinda fell apart lol), and I'm thinking I want make/ modify a pistol grip shifter, and was thinking it would be nice not have to wire anything and utilize what is allready there, plus it's pretty clean and contained on the side of the trans
02-06-2015, 02:31 AM
#4
Yeah, its a little more work and wiring to use the one on the transmission, but it's also a better switch. NSS' s mounted on columns can ve a little vague when you have a little slop in all the pivot parts of the shift linkage. My back up lights were always hit or miss on my truck with the factory switch, you had to kind of fiddle with the shift lever to get them to come on sometimes, but since the 5.3 swap using the trans mounted switch they're perfect.
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05-02-2016, 11:37 AM
#8
Curious, is the shift interlock a 12V signal? I am using a late model Buick console and shifter. So PNP pin 9 would trigger the little lock pin on the shifter?
Sorry to jump into OP's thread. I also used the PNP as NSS.
Sorry to jump into OP's thread. I also used the PNP as NSS.
05-24-2016, 02:22 PM
#9
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You get yours figured out? I'm hoping to have mine operating soon.....lol
05-25-2016, 07:10 AM
#10
Yeah, I got the park/neutral safety part working with the relay no problem, it's hooked up as ls1nova71 describes.
I haven't messed with the shifter interlock part yet as I've been trying to get the thing to fire up. Been chasing other "swap" issues. Maybe today if I can get one AN to flare fuel fitting to stop leaking......
I haven't messed with the shifter interlock part yet as I've been trying to get the thing to fire up. Been chasing other "swap" issues. Maybe today if I can get one AN to flare fuel fitting to stop leaking......
03-10-2017, 12:05 AM
#11
pin 1 goes to the starter relay, pin 86 which is the trigger wire for the starter relay. Pin 11 is power going into the pnp switch from the ignition switch. Pin 12 is connected to the start terminal of the ignition switch...correct?
Is pin 10 a ground for backup light relays or is it a power?
Just looked at the schematics I have. Pin 86 on the starter relay looks like it goes to pin 52 on the first ecm plug??
Last edited by lsdart; 03-10-2017 at 12:12 AM.
03-10-2017, 03:11 AM
#12
Pin 10 is the power for the back up lights coming out of the NSS, it is hot when in the reverse position as long as the pin 11 has power to it. There is no relay for back up lights.
On the relay, terminals 85 and 86 can usually be swapped with no problems. The factory hooks the ground for the relay to the PCM so it can control the starter relay, meaning it wont provide the ground if the VATS has been activated. Just ground it and it will work fine.
On the relay, terminals 85 and 86 can usually be swapped with no problems. The factory hooks the ground for the relay to the PCM so it can control the starter relay, meaning it wont provide the ground if the VATS has been activated. Just ground it and it will work fine.
03-10-2017, 10:15 AM
#13
Pin 10 is the power for the back up lights coming out of the NSS, it is hot when in the reverse position as long as the pin 11 has power to it. There is no relay for back up lights.
On the relay, terminals 85 and 86 can usually be swapped with no problems. The factory hooks the ground for the relay to the PCM so it can control the starter relay, meaning it wont provide the ground if the VATS has been activated. Just ground it and it will work fine.
On the relay, terminals 85 and 86 can usually be swapped with no problems. The factory hooks the ground for the relay to the PCM so it can control the starter relay, meaning it wont provide the ground if the VATS has been activated. Just ground it and it will work fine.
Thanks again
