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Do I need to bypass the neutral safety switch when swapping from 32RH to AX-15?

Vernons

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Oct 14, 2019
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when i swapped my auto to my ax15 in my 95 cherokee, i had to bypass the neutral safety switch.

so now i have a 98tj that i am swapping an auto to a ax15, and i am wondering if i will have to do the same thing.
i have the transmission in but i have not tried to start it yet
 

Goatman

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My guess would be yes. The standard transmissions have a clutch depress switch to avoid starting when in gear. You could wire this up to replace it.
 
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Vernons

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Oct 14, 2019
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i am still trying to figure out how to bypass the nss for the automatic. i removed the dash today and removed the harness under the dash cause it had the 4 cylinder in this jeep. i installed the harness that was in the 6 cylinder in the 4 cylinder dash. i never had time to install the dash cause i want to replace the heater core while i am in their.

once i get the dash back in, if i find a way to make it start with the key i will post it so maybe it will help someone else
 
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Vernons

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i found some help on another forum. wanted to post on this one so maybe it will help someone else.

i cut the plug off the harness that plugs into the automatic transmission.
i spliced two of the wires together to bypass the nss.
the other two wires are for the back up lights.
i will connect them to the manual transmission
seems to work very good.

allot of people have said that the 4 cylinder to 4.0 is a waste of time.

i seem to have not had any real problems. everything is pretty much straight forward plug and play.

i may have problems with the computer since it came from a 4.0 auto and not it is a 4.0 5 speed.

who knows. i did a 2 wheel drive to 4 wheel and a auto to manual on a 95 cherokee. everything is kinda the same, jst takes time
 

mrblaine

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when i swapped my auto to my ax15 in my 95 cherokee, i had to bypass the neutral safety switch.

so now i have a 98tj that i am swapping an auto to a ax15, and i am wondering if i will have to do the same thing.
i have the transmission in but i have not tried to start it yet
When you hook up the reverse light connection on the AX-15 with the correct harness, it does the "bypass" automatically.
 
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Vernons

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Oct 14, 2019
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Well since my wiring harness is for an automatic, I don’t think this will work for me. I will just splice the two wires to bypass the nss. And connect the other two wires to have reverse lights.

I don’t have access to a different wiring harness and honestly I don’t see the point in spending the money since I have what I need now.

All I needed was the information as to what two wires do I splice together?

Now that I know then I am good.

The body that I am using was a 5 speed. So the nss on the clutch pedal provides protection from start in gear.
 

mrblaine

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Well since my wiring harness is for an automatic, I don’t think this will work for me. I will just splice the two wires to bypass the nss. And connect the other two wires to have reverse lights.

I don’t have access to a different wiring harness and honestly I don’t see the point in spending the money since I have what I need now.

All I needed was the information as to what two wires do I splice together?

Now that I know then I am good.

The body that I am using was a 5 speed. So the nss on the clutch pedal provides protection from start in gear.
In 98, the only differences between the auto and manual harness is that the NSS and TCC adapter harness is present for the auto. It unplugs right over the trans and a small adapter harness for the manual goes in its place.

The second difference is the Clutch Safety Switch (which is another in the NSS series circuit) is plugged into a connector on the firewall/left side footwell to complete the NSS circuit so the auto will start. When you convert to the manual, you unplug that and connect it to the CSS on the clutch pedal. There is only one harness for both trans options.

The one at the trans is a short harness that looks similar to this.
1575641722834.png
 
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Vernons

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Oct 14, 2019
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I swapped the harness under the dash for the one out of the 4.0 dash.
I could not get the motor to turn over till in spliced the wires together.

I did not see another plug for the ax15.

So maybe I am missing something. But it is working now the way I have it