help please, 93 240, removed dash car wont start!!

ONLY for ADVANCED technical discussion about the 240sx!
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skypad
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Car: 91' Twin Turbo 300zx 5spd
93' N/a 300zx 5spd
93' 240sx 5spd

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okay so i removed the entire dash and unpluged all these plugs and ****, well i go to start it and i get nothing but a click coming from the fuse area inside the car, and the box where the ACC is under the hood. i plugged back in all the plugs i could, and i still see like 3 plugs and nowhere to connect them !!! im sure they werent hooked up in the first place but theres nowhere to plug them in that i can see. if any1 can tell me some main wires that must be connected to send signals for it to turn over. im a retard when it comes to this stuff any help is appriciated thanks

i am able to jump the starter and it will start up sumthing from the ignition is messed up

Modified by skypad at 3:32 PM 6/25/2007
Modified by skypad at 6:24 PM 6/25/2007


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skypad
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Car: 91' Twin Turbo 300zx 5spd
93' N/a 300zx 5spd
93' 240sx 5spd

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will a diagnosis tool determine what the problem is ?

Silvia007
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Car: 93 Nissan 240SX SE Fastback

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can you take a photo of the plugs? For your diagnosis tool... no it won't help you.

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skypad
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Car: 91' Twin Turbo 300zx 5spd
93' N/a 300zx 5spd
93' 240sx 5spd

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if u need me to take more pics, please let me know. the battery went dead on the cam and its charging now

thanks much for taking the time to help me out : )












Modified by skypad at 12:30 PM 6/27/2007

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skypad
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Car: 91' Twin Turbo 300zx 5spd
93' N/a 300zx 5spd
93' 240sx 5spd

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went to the junk yard, grabed some computer (fuses) tryed them and still wont start. any suggestions, or any where to get a diagram for the ignition relays? thanks

also i tested all the wires connections with a test light all is good, so i had a buddy put the key to the start position and tested the hot wire going from the batt. to the selonoid, and i got no juice going to the selonoid, which explains why im able to jump the starter... so, just by going with what i know so far, im thinkin its a relay not allowing it to send juice to the selonoid for whatever reason, but thats just talkin out my *** cuz i really dont know what im talkin about anyway still just tryign to keep it as detailed as possible in my lamence terms sorry but i never graduated high scholl
Modified by skypad at 11:10 AM 6/30/2007

vancouverbc
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zerothread?id=249966

look at the picture of the starter in the above link. when you turn key to start, does the ignition wire have 12v positive? when you turn key do your gauges light up etc?

the igniton relay has nothing to do with starter. you want the interlock relay by battery. check the clutch interlock switch on clutch pedal to see if it is broken.
Modified by vancouverbc at 3:30 PM 6/30/2007

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skypad
Posts: 289
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Car: 91' Twin Turbo 300zx 5spd
93' N/a 300zx 5spd
93' 240sx 5spd

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my gauges light up when i turn the key on when i go to start i hear the click, and the lights dim/cut out completely, and if my head unit is on it turns off when the key is switched to start (which is all normal if i recall) i jumped (bypassed) the clutch relay, from the pedal still nothing. i did basicly everything in the info u posted except replace the unit on the driver side under the hood. i located the interlock relay, and all seems to be intact and recieving voltage. so im stumped about to take it to nissan or a shop >.< if i fidn anything else out ill post it. thanks for the good infos i will go over everything one more time before i go spending an arm and a leg to take it to nissan or the shop

vancouverbc
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Does the ignition wire(as seen in pic) have 12v+ when you have key to start? If so, then your interlock relay and clutch switch and ignition switch are fine. You mentioned that one wire was not getting power at the solenoid. There are two wire supplying 12v+ to solenoid. One wire is the ignition wire and the other wire comes directly from the battery. Assuming your ignition wire does not have 12v+ and you have power at the interlock relay, that would suggest a problem with relay. bypass it and see what happens.

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skypad
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Car: 91' Twin Turbo 300zx 5spd
93' N/a 300zx 5spd
93' 240sx 5spd

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ok i think im getting somewhere with the help of you and nico, my ignition wire isnt showing to have any juice. but the other wire is. how would i go about bypassing the ignition wire or solving the problem why its not getting juice ? i tryed to follow the wire, i see it goes into a clip,than from there a large houseing, than from there its kinda hard to follow but it looks like it only leads to 2-3 plugs near the batt. (i think). thnx alot for all the support

EDIT** i checked the clutch wire, the one under the clutch) and its not getting any juice... i cant find out why, theres toooo many wires err but this rules out why my ignition wire isnt reciveing voltage....still stumped as to why that clutch wire isnt recieving volts, or what isnt sending volts to it :/ any help is appriciated
Modified by skypad at 10:44 AM 7/1/2007

vancouverbc
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the clutch switch supplies ground to interlock relay. think of a wire going from ground to interlock relay interrupted by a draw bridge. depressing clutch lowers the draw bridge and allows ground to go to interlock relay. make sure the ground is good.

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skypad
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93' 240sx 5spd

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ok heres what i see, i dotn see a ground wire, its just 2 wires into a connector on a black button switch.

http://img146.imageshack.us/im...2.jpg

http://img90.imageshack.us/img...2.jpg
Modified by skypad at 7:10 PM 7/1/2007

vancouverbc
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skypad wrote:ok heres what i see, i dotn see a ground wire, its just 2 wires into a connector on a black button switch.

http://img146.imageshack.us/im...2.jpg

http://img90.imageshack.us/img...2.jpg

Modified by skypad at 7:10 PM 7/1/2007
Not sure what you mean. there are only two wires coming from clutch switch and they go to blue connector that is not connected to anything? Is that what you are saying? there should be two wires at clutch switch. one is coming from ground and the other is taking ground to interlock relay.

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skypad
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Car: 91' Twin Turbo 300zx 5spd
93' N/a 300zx 5spd
93' 240sx 5spd

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there should be two wires at clutch switch. one is coming from ground and the other is taking ground to interlock relay.

this is correct, but i dont see where the wires end, they lead to a pack of wires which carries out to the front of the car. can i spice the ground wire, ground it and will that work as a ground ?

vancouverbc
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skypad wrote:there should be two wires at clutch switch. one is coming from ground and the other is taking ground to interlock relay.

this is correct, but i dont see where the wires end, they lead to a pack of wires which carries out to the front of the car. can i spice the ground wire, ground it and will that work as a ground ?
This would work as long as you splice the ground wire and not the wire going to interlock relay. If you splice interlock wire you are bypassing clutch switch. Make sure you have a digital mulitmeter(20 bucks) to do these tests.


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skypad
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Car: 91' Twin Turbo 300zx 5spd
93' N/a 300zx 5spd
93' 240sx 5spd

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ok i do have a dig. multi meter, no i dont know what settings are used for what, or how to read/use it : / at this point im ready to give up and take it to some1 who knows there stuff.. when it comes to these things, im like a 3yr trying to solve an algebra equasion, its just not gonna happen : / however i appriciate the effort and advice, ill give it till the end of this week and if i dont get it by than shes goin to the shop

vancouverbc
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Testing for 12v+: choose volts DC(straight line over V) . select 20 volt range. put one probe on engine chasis or metal part of car or negative terminal of battery and other probe on wire you are testing. you should read 12volts.

if you have no volts at ignition wire at starter and you have voltage at the interlock relay that means you have a bad interlock relay or clutch switch.

since you were messing with dash, i would guess you did something with clutch switch wiring. try connecting ground to clutch switch to see if car starts. (the car will start without clutch depressed)

testing for ground: choose ohms setting at the 200 or so scale. one probe on wire being tested and other wire on metal of car. if you get a 1, that means there is no ground. over 2 ohms means a bad ground. you are just testing if there is a continuous solid connection between car ground (car ground is anything metal in the car . everything metal is connected to negative terminal of battery.)and wire you are testing.

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skypad
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Car: 91' Twin Turbo 300zx 5spd
93' N/a 300zx 5spd
93' 240sx 5spd

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i grounded the clutch switch and i still got nothin. i tested the clutch switch for power as well when it was grounded, and theres none....so im thinkin its one of the hundreds of wires going to or from the ignition area >.< also i see some sort of existing alarm system. Just a black box with wires spliced coming from the ignition area. also another smaller box, called a piezo sensor ?? any way still jumping the starter, and finding time to play with the wires. if/when it does get resolved i will post what the problem was to inform others : )

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fearlife87
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Car: 1989 nissan 240sx

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ok, if you try to start it, and everything goes dim and cutts out., that is a dead giveaway of a dead battery, have you checked that?

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skypad
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Car: 91' Twin Turbo 300zx 5spd
93' N/a 300zx 5spd
93' 240sx 5spd

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yep, i even hooked up my friends v8 (with jumper cables) the test meter was reading 13.6 + volts. which is more than enough, and if the batt. was dead it would not start by jumping the selnoid. also theres no power in any ignition wires that i could find from the clutch switch all the way to the starter/selnoid. which makes me come to the conclusion its gonna be a frustrating process to rule out what wires do what beings that theres so many in such a tight space. and beings i removed my dash board, and replaced it, also is a dead give away that its something within the ignition near the steering wheel. the thing is i have little knowledge of electrical stuff and no luck in finding diagrams to explain what wires do what and so on.. last resort, shes goin to the n issan dealership, because there no import tuner shops near me : / thanks for your advice/idea anyway,any advice or idea is much appriciated!

vancouverbc
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Car: 1991 240sx

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skypad wrote:i grounded the clutch switch and i still got nothin. i tested the clutch switch for power as well when it was grounded, and theres none....so im thinkin its one of the hundreds of wires going to or from the ignition area >.< also i see some sort of existing alarm system. Just a black box with wires spliced coming from the ignition area. also another smaller box, called a piezo sensor ?? any way still jumping the starter, and finding time to play with the wires. if/when it does get resolved i will post what the problem was to inform others : )
The clutch switch does not have any power. it is just ground. when you close switch ground goes to interlock relay. if you have power at the interlock relay, all your ignition wires in dash are fine. to understand this fully, you need to understand how a relay works. look up relay in tutorials.

this link has all the wiring related to starter:

zerothread?id=249966



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