Auto to Manual Transmission Swap - Page 3 - JeepForum.com
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post #31 of 44 Old 12-19-2019, 12:59 PM
40vern
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i cut the plug off that was used for the auto transmission. the two wires were the same color listed above. i spliced them together after unhooking the battery,
then i found the same two color wires next to the computer. i used a meter and tested to see if i had the same two wires to and the meter gave me an alarm saying that they were. so i hooked up a relay and then the jeep would not start. fuel pump.
so i put the wires back together and hooked the relay up at the transmission. jeep started and ran like new. no check engine light.
so i am thinking that even though i had the correct to wires next to the computer, maybe one of them also was used for the fuel pump.
either way i will drill a hole up next to the dash. run the two wires through and place the relay somewhere next to the dash.

only drove it about 5 miles. i will find out later if this works or not.

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post #32 of 44 Old 12-20-2019, 04:27 AM
skjeep
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You are on a good path but you have to TAP into existing wires near the pcm, not cut them.
The 12volt wire is a feed from asd output. So it powers many other things, not just the trans relay.


edit:
The other one Or/Lg wire (TCC lockup) is only for that, so this one you could actually cut.

current 2x XJ, 2x JK-U, SJ, M38A1, WJ
gone XJ, TJ, XK, ZJ
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post #33 of 44 Old 12-20-2019, 11:20 AM
Rubi4MyMrs
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True, if you cut the wire red/light green wire before it splices to the solenoid which is a bit below the PCM you will lose power to the fuel & ASD relay coils & no start.

Just for clarification, the power comes from fuse 11 in the fuse block, not from the ASD relay. It does power, among other things, the ASD & FP relay coils as well as the PCM & converter solenoid.


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post #34 of 44 Old 12-20-2019, 11:52 AM
40vern
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ok thanks. i have not had a chance to really drive it but so far i dont have a check engine light. i will probably run it up to the fuse box behind the glove box. this way it will stay dry and i can have access to it if the future.

if this will continue to work, it will save me a lot of money and make for many interesting conversations.

thanks for everyone that has helped me. hopefully i can return the favor
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post #35 of 44 Old 12-23-2019, 10:52 PM
40vern
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well i guess i did not drive the jeep long enough the other day. the check engine light is coming on again. i am not sure if it is the same code. i will have to go and check tomorrow if the auto parts store is open.
i was thinking it was the relay but i guess it could be something else.

just wondering, it the code turns out to me for the torque converter, i wonder if the check engine light would go out if i was to buy a torque converter clutch solenoid and plug that up?
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post #36 of 44 Old 12-24-2019, 09:26 AM
40vern
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Now it is showing a p1899. Park neutral switch.

The two wires that I cut and taped together were with the two wires that went to the reverse switch.

So I am wondering if I will have to hook those to a switch?
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post #37 of 44 Old 12-24-2019, 02:28 PM
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P1899 (M) -- P/N Switch Stuck in Park or in Gear -- Incorrect input state detected for the Park/Neutral switch.

That is the other (of the 2) codes you were originally getting.

That is a code I have not seen before. It appears that the PCM is not seeing the switching it expects which happens when moving to/from P/N.

You said “The two wires that I cut and taped together were with the two wires that went to the reverse switch.

Recheck something. If there are 3 wires for the park/neutral & backup lights in one connector. You needed to jump the center brown/light blue wire to ground (or use the jumper connection) to bypass the P/N switch to get it to start. The other 2 are the backup lights & should be connected to the backup switch on the AX15. Is that what you have done? If it has 4 wires, that would be different.


I’m wondering if you break the P/N wire’s path to ground after starting whether that will keep the CEL from coming on & throwing that code.
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post #38 of 44 Old 12-24-2019, 06:40 PM
40vern
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interesting

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Originally Posted by Rubi4MyMrs View Post
P1899 (M) -- P/N Switch Stuck in Park or in Gear -- Incorrect input state detected for the Park/Neutral switch.

That is the other (of the 2) codes you were originally getting.

That is a code I have not seen before. It appears that the PCM is not seeing the switching it expects which happens when moving to/from P/N.

You said The two wires that I cut and taped together were with the two wires that went to the reverse switch.

Recheck something. If there are 3 wires for the park/neutral & backup lights in one connector. You needed to jump the center brown/light blue wire to ground (or use the jumper connection) to bypass the P/N switch to get it to start. The other 2 are the backup lights & should be connected to the backup switch on the AX15. Is that what you have done? If it has 4 wires, that would be different.


Im wondering if you break the P/N wires path to ground after starting whether that will keep the CEL from coming on & throwing that code.


i am sorry for being lazy and not going and looking at the color of the wires. i also got them from a forum some where.

the harness had a plug that went to the automatic transmission. their were 4 of them.
two of them i hooked to a plug that would mate my az15 for the reverse lights.
the other two wires, i connected them together so the jeep would start. it they are not connected the jeep will not start.

so i connected them and the jeep would start and i left them connected. this is what i think gave me the code.

i am guessing i have to connect them so the computer will think that it is in park and then it gives me a code cause the computer thinks that it is still in park.

so today i connected or added to those two wires and ran them out to where i can get to them. i would connect them together and start the jeep. then i would disconnect them and drive the jeep.

i did this all day and no check engine light.

so i am thinking that and easy fix would be to add a push button. turn the key and press the button and i should be good.

i did this to my 95 cherokee when i did an auto to 5 speed swap.

reason was i noticed that when i would connect the jeep and start it, the motor would sound different when i disconnected the wires.

i dont know if i am doing the right thing but so far it is working. i am sure their is a better way than adding a push button but for now this is all that i know to do
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post #39 of 44 Old 12-24-2019, 07:06 PM
Rubi4MyMrs
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OK, I think I do remember you had 4 wires & did it correctly. Good idea with a push button. Whatever works to get the light out.
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post #40 of 44 Old 12-24-2019, 10:01 PM
40vern
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thanks

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Originally Posted by Rubi4MyMrs View Post
OK, I think I do remember you had 4 wires & did it correctly. Good idea with a push button. Whatever works to get the light out.
i just happened to think about the way my cherokee reacted when i was dealing with this. i did that swap back in the summer. i had to cut the wires on it too. i pretty much did it the same way. the thing i remember the most was that they i would connect the wires to crank the jeep, the motor did seem to run different after i took the wires apart. so for that reason i used a push button.

i want be able to buy one tomorrow but thursday i will try to pick one up.

as for now i just touch the wires together and start it. other than that it drives very good. i really enjoy being back in a wrangler. i love my cherokees but the wrangler is so much different.

buddy, thanks for the advice you have given to me. i have enjoyed the conversations allot. Merry Christmas to you and your family.
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post #41 of 44 Old 12-25-2019, 10:55 AM
Rubi4MyMrs
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You have done a great job on this project. It has been great working through it with you on this & your other postings. Always like new challenges.

Have a great Christmas & an even better coming year!
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post #42 of 44 Old 12-26-2019, 01:08 PM
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Quote:
Originally Posted by 40vern View Post
i am sorry for being lazy and not going and looking at the color of the wires. i also got them from a forum some where.

the harness had a plug that went to the automatic transmission. their were 4 of them.
two of them i hooked to a plug that would mate my az15 for the reverse lights.
the other two wires, i connected them together so the jeep would start. it they are not connected the jeep will not start.

so i connected them and the jeep would start and i left them connected. this is what i think gave me the code.

i am guessing i have to connect them so the computer will think that it is in park and then it gives me a code cause the computer thinks that it is still in park.

originnaly the 32RH tranny has only 3 wires to NSS switch. The reverse lights are turned on via switched +12 volts. On the AX15 the reverse lights are switched by grounding it. But it does not matter, because teh AX15 backup lamp switch is also insulated 2 wire NO switch. However i would use a relay for safety reason (i do not like live wires under the jeep )



The original wires are

Violet/White - this is a fused ignition (RUN) +12volt
Bown/LightBlue - this is a Park/Neutral sense
Violet/Black - this is feed for backup lamps



So what you can do is splice the VT/WT wire and VT/BK wire to the backup lamp switch of your AX15



and splice the VT/WT wire and BR/LB wire to the clutch pedal position switch (if you have one)



That way you will have the backup lamps whne shifted into R and Jeep will start only when you depress the clutch pedal. This should also help to get rid of the P1899 error

current 2x XJ, 2x JK-U, SJ, M38A1, WJ
gone XJ, TJ, XK, ZJ
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post #43 of 44 Old 01-09-2020, 10:35 AM
40vern
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thanks

for the moment everything is working great. back up light work and i have the other two wires connected to a push button to start the jeep.

at one time i just spliced them together but then i got a code saying that i was basically driving in park.

so i hooked up a push button and the code went away.

now i was thinking about hooking those two wires up to the wires for the clutch pedal.

however now i am wondering if i do then would that make the code come back.

my thinking is when i push the clutch in at 45mph for example, the clutch pedal connects the circuit and the computer thinks i am in park again

another thing for some reason the clutch pedal switch is not stopping the jeep from starting. it will start up in first gear or reverse like a boss
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post #44 of 44 Old 01-09-2020, 12:10 PM
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The p/n connection (that you have connected to your push button) is in the grounding circuit to the relay coil. The clutch switch is in the 12v power circuit to the relay coil & is bypassed with a jumper for those with automatics (constant 12v to the relay).

I think the way you have it now when you hit the push button switch you are grounding the starter relay & the starter engages & with the key on, it starts. If so, you can not connect them to the clutch pedal instead of the push button. If you do, when using the clutch to shift gears you will also be grounding the relay & engaging the starter (when the engine is already running). Can’t have that.

Here is what you need to do.

Leave those 2 wires to the push button as you have now. Then to get the clutch switch to function you need to remove the jumper wire that is there to bypass the switch & connect those 2 wires to the clutch switch. That will allow the clutch to only send the 12v to the relay when the pedal it in & the push button will still be used to engage the starter which should keep the CEL off (as it is now).
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