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4L60E Park / Neutral Switch Types. Compatible?

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Old May 18, 2015 | 02:17 PM
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Question 4L60E Park / Neutral Switch Types. Compatible?

Can't find this anywhere. Already searched.
Are these connectors compatible? Can you go from one to the other?





4L60e park neutral connector swap

They seem to have the same "signals" but for 2 wires that might be the same, but with a different names. They even have the same amount of wires and even most same colors.

I'm swapping a V8 (LS type) into a 2006 Trailblazer, keeping the original trans. The original trans has the 1 connector switch, while the engine harness has the 2 connectors harness (2003 LQ9)

Any help/guide/suggestion is highly appreciated.
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Old May 19, 2015 | 09:51 AM
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This is what I'm working with:





4l60e neutral safety switch wiring





4l60e neutral safety switch wiring

This are the signals names, pins with their corresponding names:

Newer Connector. *** Older Connector.
1: PNP Clutch/Start Switch Sig. *** E/C2: Starter Relay Coil Supply Voltage.
2: Not Used.
3: Not Used.
4: Trans Range Switch Sig B. *** D/C1 Trans Range Switch Sig B.
5: Trans Range Switch Sig A. *** A/C1 Trans Range Switch Sig A.
6: Trans Range Switch Sig C. *** B/C1 Trans Range Switch Sig C.
7: GND. *** D/C2 GND.
8: Trans Range Switch Sig P. *** C/C1 Trans Range Switch Sig P.
9: Park Neutral Position Switch Sig. *** B/C2 Park Neutral Position Park Switch Sig.
10: Back Up Lamp *** F/C2 Back Up Lamp
11: Ignition 1 Voltage *** C/C2 Ignition 1 Voltage.
12: Ignition 1 Voltage *** What goes in here? I have: Neutral Safety Switch Park/Neutral signal not assigned on G/C2, but I'm not sure.
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Old Feb 13, 2016 | 02:36 PM
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I know this post is old...but did you find the answer? I have the same question
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Old Feb 13, 2016 | 08:42 PM
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Yes, either one will work. The newer one has a better plug, the older ones are glued in and hard to get out.
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Old Feb 14, 2016 | 07:46 PM
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There's so much info for the older style plug, some reason newer one is mystical lol..... good luck=)
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Old Feb 15, 2016 | 07:42 AM
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Default Neutral safety switch

As a side note it was pointed out that the old switch was hard to unplug because it is glued in. To get the plug off use a heat gun, as soon as the glue starts to run it can be pulled apart without ruining either.
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Old Mar 8, 2016 | 07:54 AM
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I just swapped from a MY 2002 4l60e with the old style plug to a MY 2007 4l80e with the new style plug. basically it looks like they just combined the range sensor and the solenoid sensor into one plug.

In my swap I only use the ground wire from the range sensor portion of the old plug, so I didn't trace out where the second pink was coming from or what purpose it served.

I suspect that you could piggyback it off the pink going to 11 on the new plug ( pin C on the old plug) and that it simply provides power to one of the range sensor functions (back up lights, etc)

to find out out for sure you'd have to look at a schematic for a MY 2005 or newer vehicle with a 4lxxe series tranny.
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Old Feb 1, 2023 | 11:35 AM
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So I can splice the old plugs with the new one
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Old May 7, 2024 | 09:10 PM
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Originally Posted by RandallBrown
So I can splice the old plugs with the new one
did you ever get an answer?
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Old May 7, 2024 | 09:28 PM
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Put the wires in the right places and it whould work, both diagrams are there so have at it.
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Old May 9, 2024 | 11:43 PM
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Originally Posted by the_merv
Put the wires in the right places and it whould work, both diagrams are there so have at it.
most of the wires match up the only issue I have is the fact that there's 2 wires that don't match up. And the fact that one plug has 12 wires (but 2 of the pins aren't used) and the original plugs have 11 wires. Could I just swap out the whole neutral safety switch from the single connector and just use one that has 2?
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Old May 10, 2024 | 11:01 AM
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Depends on what you are swapping the setup into, I try to use the N/S Switch that's factory to the vehicle.
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Old Apr 5, 2026 | 07:44 PM
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Apologize for digging up an old thread here. This thread is on the path of what I'm looking for. Is anyone aware of a company making a relay switching board to work off the 4L60E/4L80E gear range selector switch for the purpose of using for shift indicator lighting. I know Dakota Digital makes a GSS-3000 that you can cobble together to accomplish that task. I know someone from the IH8MUD website built one for the same purpose I am searching for. I'm not good with electronics, hoping someone is aware of a device already engineered and being produced and sold to do what I am needing? Let me know if you can help?

https://forum.ih8mud.com/threads/ls-...dapter.908575/
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Old Apr 24, 2026 | 10:23 PM
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Originally Posted by Howardkats
Apologize for digging up an old thread here. This thread is on the path of what I'm looking for. Is anyone aware of a company making a relay switching board to work off the 4L60E/4L80E gear range selector switch for the purpose of using for shift indicator lighting. I know Dakota Digital makes a GSS-3000 that you can cobble together to accomplish that task. I know someone from the IH8MUD website built one for the same purpose I am searching for. I'm not good with electronics, hoping someone is aware of a device already engineered and being produced and sold to do what I am needing? Let me know if you can help?

https://forum.ih8mud.com/threads/ls-...dapter.908575/
What outputs are you looking for? What is going to display the range selector info? I may have a solution.

I read those inputs and send it to a custom touch screen, but if you want to turn on some dash lights, that's do able too.
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Old Apr 25, 2026 | 03:02 PM
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Originally Posted by LSswap
What outputs are you looking for? What is going to display the range selector info? I may have a solution.

I read those inputs and send it to a custom touch screen, but if you want to turn on some dash lights, that's do able too.
Wanting to still use my factory gauge cluster for transmission gear selection indicators. They are mini bulbs in the gauge cluster. Was controlled by the stock toyota transmission. I have the pigtails for each shift light position identified. Not sure if this info help? Thanks for the help!


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Old Apr 25, 2026 | 04:31 PM
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So if you were to want to use and arduino to translate the 3 signals into a shifter position, here is come code from my transmission controller.

int check_shifter() {

// returns the shifter position based on shifter 4l60 gear settings

a = digitalRead(shifterAPin);
b = digitalRead(shifterBPin);
c = digitalRead(shifterCPin);
p = digitalRead(shifterPPin); // P is ignored in this version


// ABCP 4l60e selector pins
// 0110 Park
// 0011 Reverse
// 1010 Neutral
// 1001 OD
// 0000 Third
// 0101 Second
// 1100 First

switch (a) {
case HIGH: // 1010 1001 1100
switch (b) {
case HIGH: //1100
switch (c) {
case LOW:
return shifterReverse;
break;
}
break;
case LOW: // 1010 1001
switch (c) {
case HIGH: // 1010
return shifterPark;
break;

case LOW: // 1001
if (p == LOW) {
//set_tc_alarm(14);
}
return shifterNeutral;

break;
}
break;
}


case LOW: // 0110 0011 0000 0101
switch (b) {
case HIGH: // 0110 0101
switch (c) {
case HIGH: // 0110
return shifterSecond;
break;
case LOW: // 0101
return shifterOD;
break;
}

case LOW: // 0011 0000
switch (c) {
case HIGH: // 0011
return shifterFirst;
break;
case LOW: // 0000
return shifterThird;
break;
}
break;
}
break;
}

// should never get to this point
set_tc_alarm(19);

} // end check_shifter()
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Old Apr 25, 2026 | 04:47 PM
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if your lights were operated by grounding each light to turn it on, my processing board would be a slam dunk. But your wiring shows that you need 12V to turn each light on, so I would need to modify my processor board.
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Old Apr 25, 2026 | 08:25 PM
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Is 12-volt wired from the Toyota A442F transmission. Grounded through common after the bulbs. Sounds like I really need your processing boards. I sent you a private message. Thank you!!!
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Old Apr 25, 2026 | 08:26 PM
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Originally Posted by LSswap
if your lights were operated by grounding each light to turn it on, my processing board would be a slam dunk. But your wiring shows that you need 12V to turn each light on, so I would need to modify my processor board.
Is 12-volt wired from the Toyota A442F transmission. Grounded through common after the bulbs. Sounds like I really need your processing boards. I sent you a private message. Thank you!!!
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Old Apr 27, 2026 | 05:10 AM
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Howard, you only have 6 lights, but there are 7 positions in the shifter. Look at the logic table below:
// ABCP 4l60e selector pins
// 0110 Park
// 0011 Reverse
// 1010 Neutral
// 1001 OD
// 0000 Third
// 0101 Second
// 1100 First

Which one do you want to ignore? or maybe have either first and second turn on your low light?
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