ka grey chassis plug a wire that shows 12v no?

[S13 240SX]

as the title says..

i been told a wire should show 12v when key to ON but i checked all the wires coming off the ka grey chassis plug and none of them are showing 12v when key is ON. anybody ran into this problem and whats the fix for it?

[BoostFab]

the BLACK/RED STRIPE wire on the gray oval plug should see 12v when key turn to ignition on.and the RED wire should see constant 12V

[S13 240SX]

do you mean ka black/red stripe wire to rb black/red because thats the way i have it and its not showing 12v's with the key to ON, none of them are wires are coming off from the oval plug show 12v for me.. and on my rb i dont have a solid red wire coming off the hanress plug where is used to wire and slice to the ka oval plug.

[BoostFab]

[mello88]

do you mean ka black/red stripe wire to rb black/red because thats the way i have it and its not showing 12v's with the key to ON, none of them are wires are coming off from the oval plug show 12v for me.. and on my rb i dont have a solid red wire coming off the hanress plug where is used to wire and slice to the ka oval plug.

Do you have the rest of your wiring done already and your engine won't start?

Take a picture of your connectors/wire colors..

KA RB Black/Red > Black/Red (Thick wire)Red > White/Black (Thick wire)Black/Pink > Black/Pink (Thin wire) [Fuel pump relay signal]Black/Yellow > Black/White (Thick wire) [could not find on my RB harness]White/Red > White/Red (Thin wire) [This is the alt charge wire I think]Fusebox White > White/Purple (Thick wire) [constant +12v]Alt. White/Blue > Batt Terminal (Very Thick wire)

I just wired mine up like this over the weekend and it works great.
Modified by mello88 at 9:46 AM 5/30/2008

[S13 240SX]

ok yeah that plug i checked every wire on it and none of them are 12 volts none of them give any reading what so ever.

[S13 240SX]

yeah all my other connections are done everything else is wired up.

none of those wires from ka plug show me 12 volts thats the problem, i also checked for blown fuses no fuses were blown, and all my grounds are connected.

sorry no pics unless you want a crappy cell phone pic which would be hard to see.

[mello88]

It's the black/red wire you're having trouble finding? Did you try hooking it to the KA black/red and try starting? Where did you hook the white/purple wire to?

Does it turn over? Do the lights on the ECU turn on when the key is turned on? Do your green relays click on? Fuel pump primes? Do you get fuel out the injs? Do you get spark?

I didn't measure for switched 12v on any of the wires. I just used the CarlH/skilzilla wiring guides, then figured out the white/purple wire (constant 12v).

Put up some more symptoms or answer my ??s above, we should be able to help u get it wired up...

[S13 240SX]

It's the black/red wire you're having trouble finding? Did you try hooking it to the KA black/red and try starting? Where did you hook the white/purple wire to?

Does it turn over? Do the lights on the ECU turn on when the key is turned on? Do your green relays click on? Fuel pump primes? Do you get fuel out the injs? Do you get spark?

I didn't measure for switched 12v on any of the wires. I just used the CarlH/skilzilla wiring guides, then figured out the white/purple wire (constant 12v).

Put up some more symptoms or answer my ??s above, we should be able to help u get it wired up...

yes the black/red wire is hooked up... the white/purple is going to the fuse box white, my ecu lights and dash lighs come on, fuel pump comes on, i have spark, all the relays click when key is turned ON and back off.

engine cranks over, if once in a while i shake my ka oval plug it'll start but run like crap and all my connections are solder so i dont understand nothing is loose to what i can see and find and feel.

but the main guestion is why I am not getting 12volts from any of the wires???? thats the main question cuz if i dont get 12 volts then the car doesn't start, so thats the main problem, and i can't think of anything unless my efi box is totally screwed or done for. which i hope its not that.

[mello88]

Well it sounds like you're getting 12v to the ECU anyway if you're getting both relays to kick on, fuel pump primes, LEDs on ECU and sparks... I wouldn't worry about it, sounds like everything is working okay and it sounds like you have it wired up properly...

I suggest you check your CAS/timing, I bet your timing is all off. which is why it never fires. Also make sure you have no vac leaks, that was screwing me up for a while... If it never really starts but just sputters/pops when you try to start it, the CAS spines are probably 180 degrees off. Have you pulled a plug out to see if your injectors are firing? They _should_ be if youre getting spark.

I'll try to remember to go out and DMM my oval connector tonight to see what voltages I get there with key on...

[BoostFab]

check the connection to your battery. check the ground and try a fully charged battery. how is your alternator wired ?

[S13 240SX]

check the connection to your battery. which lower harness did you used ? how is your alternator wired ?

well my battery is shows 11.60 volts and as for lower harness i'm using the ka lower and my alernator there's nothing special wired about it it all plugs in..

[BoostFab]

if your engine rotate slowly; try a stronger battery. 11v is may be not enough.

[S13 240SX]

i dunno... engine is rotately pretty decent.

also i have a battery charger and i onced charged it to 12.02 volts and still pretty much nothing.

[BoostFab]

do another run through on the wiring. are you getting fuel pressure, and the fuel line connected correctly ?

[S13 240SX]

yes i have pressure and yes the fuel lines are on right,

but i'm still not getting understand why i'm not seeing 12 volts from any of the wires on the ka oval plug?

[S13 240SX]

mello where did you wire the ka black/yellow up to? black/white wire i found a few of them at my ecu plug? which pin does black/yellow go to?

do you have an aim s/n ?
Modified by S13 240SX at 10:37 AM 6/1/2008

[BoostFab]

mello where did you wire the ka black/yellow up to? black/white wire i found a few of them at my ecu plug? which pin does black/yellow go to?

do you have an aim s/n ?

Modified by S13 240SX at 10:37 AM 6/1/2008

you my friend, are going in circle with this wiring. i need to clear you up, one thing: you are using the ka lower harness.

the thick black/yellow wire you are searching for is from the rb's lower harness. it's just the power cable on the lower rb harness. it 's in the engine bay by the fuse box.

you need to make sure you wire everything into the right place, look over all the write up, not just one. before hooking to the main power to the battery, as it can fry things if not wired correctly.

[S13 240SX]

you my friend, are going in circle with this wiring. i need to clear you up, one thing: you are using the ka lower harness.

the thick black/yellow wire you are searching for is from the rb's lower harness. it's just the power cable on the lower rb harness. it 's in the engine bay by the fuse box.

you need to make sure you wire everything into the right place, look over all the write up, not just one. before hooking to the main power to the battery, as it can fry things if not wired correctly.

no i'm not talking about the black/yellow power cable..

i'm still on the ka two chassis plugs here... its a black/yellow thin wire coming off 1 of the ka chassis plugs where does this wire wire to?