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My240
05-15-2006, 07:11 AM
i am in the process of converting my s13 from auto to 5 speed. i bought a tranny and the 3 sensors that are on the side had all been cut, this is not including the wheel speed sensor at the back. does anyone know what each of these sensors are for and how they wire up? thanks for your help

tre
05-15-2006, 08:12 AM
You're local nissan dealership can tell you that

g6civcx
05-15-2006, 08:22 AM
You need to get a lower engine harness that goes from the back of the gearbox from a manual gearbox. It plugs up to the engine room harness. If it's cut you have to manually wire them up yourself.

My240
05-15-2006, 08:36 AM
would you be able to explain that a bi5t further? i have no idea where the the harness would go into the engine room harness

g6civcx
05-15-2006, 08:44 AM
Go to a local junkyard. If you can see one with a manual gearbox you could probably just unplug all the sensors and take out the whole harness.

If you don't have one you need to read the FSM. Try getting one from your local dealer.

If it's not possible you have to redo the wire harness yourself. That's as far as I can explain it because it is complicated. A shop would probably charge you 10 hours of labour to fabricate a gearbox harness from scratch.

My240
05-15-2006, 08:50 AM
alright man sounds good thanks for your help i really appreciate it. but if anyone else still has anymore input then feel free to put in your knowledge

mjjstang
05-15-2006, 10:51 AM
why not just forget about it, you dont need any of that shti, the only useful one is speed and that is on the main harness.

My240
05-15-2006, 01:02 PM
so you're saying that those 3 sensors don't even really have a purpose? like what do they do? are they for the back-up lights at all? i mean there has to be a purpose to them

aznpoopy
05-15-2006, 01:16 PM
get a FSM dude.

park neutral switch
reverse lamp switch
OD position switch

first two are obvious. i never figured out what the third one does. lol.

tre
05-15-2006, 01:18 PM
OD... maybe Overdrive? When the car tends to lean itself out to give you premo gas mileage on the freeway?

aznpoopy
05-15-2006, 01:26 PM
possibly. i think "OD" refers to 5th gear.

My240
05-15-2006, 01:48 PM
alright guys that was awesome. thanks for all your help.

g6civcx
05-15-2006, 03:29 PM
It's the 5th gear indicator. The ECU does something with it, mostly for the top speed governor.

240silvia
05-15-2006, 04:06 PM
The only two you need is the speed sensor in the back and the middle sensor. The middle sensor is for the back up lights. I only have those two hooked up.

My240
05-16-2006, 07:03 AM
sweet deal. thanks for the help guys i really appreciate it

dopeassjackson
05-16-2006, 07:48 AM
from the tail of the tranny it goes back up switch, OD switch then neutral i think. the speed sensor is in there some where also.

My240
05-16-2006, 09:41 AM
keep the info commin. thanks. i ordered myself one of those service manuals on disc but it hasn't come in. but you guys are doing a great job

mjjstang
05-16-2006, 10:44 AM
never needed a service manual on disc, and ive done a lot of work, how bout www.zeroyon.com????? FRREEEEEEEEEEE

g6civcx
05-16-2006, 11:30 AM
In his defense, zeroyon doesn't have the SOCH FSM and convertible add-on.

My240
05-16-2006, 11:44 AM
well my KA is DOHC and it's not convertible. but i never knew about that site til now. but thanks

rancid240
05-16-2006, 11:48 AM
maybe a dumb question, but whats the purpose for the neutral sensor?

My240
05-16-2006, 01:33 PM
i was wondering about that aswel. i mean you're gunna be pushing in the clutch anyways so i don't even think you'd really need the neutral switch. or do i?

mjjstang
05-16-2006, 08:32 PM
neutral is so you cant start the car when the clutch is not pushed in, at least this is what I think, I mean i can start mine in any gear i want with the pedal not pressed in, this is because I dont have my sensor connected. someone correct me if im wrong.

g6civcx
05-16-2006, 08:53 PM
The neutral switch isn't used for starting. You can't start without pressing the clutch even if you're in neutral.

mjjstang
05-17-2006, 12:01 AM
o yah silly me, anway i can start it no matter what, so i got something unplugged

My240
05-18-2006, 07:20 AM
so the only sensor that i really need is the one the turns on my back up lights?? and what do i connect that to?

rancid240
05-18-2006, 09:41 AM
so the only sensor that i really need is the one the turns on my back up lights?? and what do i connect that to?

Im guessing autos dont have a plug for that. Well on a manual when the shifter is in reverse the sensor will, I dont know the word, but it will have 0 resistance. So what Im thinking that either the positive or the negative (more likely the negative) wire to the reverse lights will connect to one of the prongs, the other to a gournd, and the sensor completes the circuit when its in reverse.

My240
05-18-2006, 09:57 AM
i guess that would make sense about the connection, so as soon as you put it in reverse you'd complete to power circuit and it would turn on the lights right?

rancid240
05-18-2006, 02:33 PM
i guess that would make sense about the connection, so as soon as you put it in reverse you'd complete to power circuit and it would turn on the lights right?

Thats what I am thinking.

Slyce
05-18-2006, 03:35 PM
take a look at this

http://ka24development.com/cwilfert/S14_tranny_swap_electrical.html