Help please guys

[Omni]

Well guys i bought a harness and i am not seeing the blue relay on it...is it possible to delete it or something cause even though i have one sitting around i wanna know whats up cause i am not seeing it nowhere on the harness need some advice please...also my starter is getting 3 volts like i dunno wth is going on smh

[Darius]

It is probably a Series 2 harness.

The starter should be getting direct battery voltage so it should have 12V while the car is off and ~14V while running. Alternator not working properly?

[Omni]

i know a s2 harness suppose to have a relay isnt it my series 2 harness had one now this doesnt...and the starter is getting 3 volts with the car off hahahah and it wont even allow the starter to even make a click but i guess i dunno wth is up

[Darius]

I thought Nissan did away with the external relays and moved them into the ECU on the Series 2 engines? Someone correct me if I'm wrong.

As far as the starter getting only 3V, check your battery voltage. I assume it is at 3V. If it is >3V, I have no idea. That would be a LOT of resistance in the starter power supply and would be heating up like a sumb!tch. To be clear, you are talking about the big power wire and not the smaller starter signal wire, correct?

[Omni]

yeah i am talking about the big power wire on the starter and not the small one...but also my starter does not over heat one bit the s*** is cool like ice and my battery does have more than 3 volts hahahah...uhm could a bad ground on the lower harness cause the starter to be lacking on voltage????...and also i know they normally say the s2 come with 1 relay and the s1 come with 2 if i remeber reading right

[Darius]

The starter power wire is connected to the battery positive terminal. It should have 12V. If it does not, there is a problem with the wire. Since it only has 3V, it will not provide the starter with enough amps to turn the motor over.

[Omni]

i know right smh i guess i gotta take my lower harness off and see whats up cause i dont even get a click from the starter hahahaha and i looked at the ecu plug compared to my other one and it seems like there were alot of wires depinned and harness seems way smaller than it should be but everything for it seems to be there every plug and everything

[240z4u]

Before you go taking everything apart clean up all your grounds. Seems like that may be the problem as Darius suggested.

[Omni]

Before you go taking everything apart clean up all your grounds. Seems like that may be the problem as Darius suggested.

yeah i will do that...also anyone ever used a s2 harness without the blue relay??

[StricNyne]

series 2 wired for s13 ?

[Omni]

series 2 wired for s13 ?

yes sir and from the looks of the ecu plug a few of pins been depinned

[DustinZ]

S2 should still have the eccs relay on it. If its missing it wont effect the starter. Check your grounds if you have a solid wire connection from battery to starter +.

DustinZ

[Omni]

will the engine run without the relay dustin and i am waiting for my friend to bring back my battery so i can test the starter and voltage again

[Darius]

You can hardwire the power to the ECU, but I wouldn't recommend it. Is there any indication that there used to be a relay on the ECU 12V power wires like it was cut out or smoething? You can always add one fairly easily.

[Omni]

i didnt do it this is how i bought the harness and the harness is wrapped up nice and neat so i didnt tear into it but there are a few pins missing from the ecu plug when i compare it to my old harness

[StricNyne]

dude, just buy a wiring specialities harness and sell your old one if its depinned and u dont have a toner or ecu plug is broken it could be a headache

[Darius]

It wouldn't take much effort to simply go through the harness and verify each wire and its connectivity. You might have to unwrap it to see what was done to the power wires though.

[Omni]

the ecu plug is fine its not broken either...and as for buying a wiringspecialist harness sure the idea sound nice and great but its the money i cant afford yo ujust dish out 500+ on a harness..well not now atleast so i cant do it...i know you guys gonna say well i bough a rb blah blah blah but the fat of the matter is for all that money i might as well keep saving and go standalone

[Darius]

You don't need a wiring specialties harness. Don't listen to StricNyne jk man!

Don't be worried about digging into the harness a little bit to trace things out. You should have a wiring diagram printed out and a multi-meter and that should be all you need to verify that it is wired correctly.

[StricNyne]

i guess i got lazy in my old age hahah

[Omni]

hahahaha ooooo wow..well i got the car cranking today but no start then my start stop turning over again i just opened up the harness and it looks like the previous person instead of splicing or w.e just depinned the wires he didnt want...but the harness is hard to explain hahaha sry

[Darius]

That's what I expected. :/ Yeah you'll need to go through that harness wire by wire to verify that whatever work he did is correct for your setup.

[Omni]

yeah thats why im just gonna sell the harness like los said cause i dont think it works for my setup cause for some reason it was probably for another ecu or something so i am not gonna knock the guys work...so i will be wrapping up back the harness tonight an dgetting it ready to ship out to whoever wants it...also even though my fuel pump is priming its priming without the ecu connected..and everything is getting power just when i turned my cas today to hear my injectors click i got nothing

[Omni]

after looking at the harness i just bought and a post on here i see that all the pins that was mentioned in the post to use the z32 ecu those are the pins that are missing from my plug...so what to do guys cause after reading that post i am kinda happy but then again i can never be too sure

Pin-103
Pin-110
Pin-112
Pin-114
Pin-23,24,25,26,27,29,30,35
Pin-4,5,7,9,15,16,18
Pin-42,44,45,46,47,57

Those are the pins that got depinned from my plug...i dunno if anyone can tell me which ecu or w.e this looks like it matches up to i know its a long shot but its worth a try..thanx ahead of time

[Omni]

anyone can tell me anything??

[DustinZ]

That's bad. 103,110,112,114 are injector triggers just to start with. That's bad. Do you have a series 1 or 2? Quick check by looking to see if you have an ignitor on top of your coil pack cover or not.

Dustinz

[Omni]

i have a series 2 sir...thats what i was seeing from the pinout and started to get upset but then again..could it be used for a s1 ecu or thats not possible??...also when i plug in the harness to the dash interface and use my multimeter to check for power they are all getting power everything thats needed to get power has power

[Wiring Specialties]

Omni
If you decide to pick up something new and sell your current harness, have a look at our site.
www.wiringspecialties.com

We can get you set up with a drop in turn key harness that will be brand new.

[Darius]

I don't know what the guy sold this harness as, but there's no way it is an RB25 harness to be used with an RB25 ECU. Most of the pins that you listed as missing (above) are critical to getting the engine to run. For example, you said pin 16 is blank...that pin is the wire that grounds the relay to transmit power to pin 49. This is what I was assuming was hard wired since the relay was missing. This may work but is not an ideal installation. Like DustinZ said, you're missing 4 of 6 injector grounds, the knock sensors, MAF sensor, O2 sensor, CAS signal, neutral switch (no biggy), tach signal, and AAC valve, plus all the pins for making A/C work.

From here you have 2 options:
1) Get rid of the current harness (return it or sell it). Personally, I'd return it and make the joker give me my money back. Then, buy a new harness from Wiring Specialties or someone else with a complete harness Raw Brokerage might also have this in stock.
2) Repin the ECU connector on the existing harness and hope all the sensor plugs are resent (doubtful in this case).

Of course, my recommendation is to take option #1.

[Omni]

i have it up on ebay and keep contacting him about the harness.. i think i might start a dispute with paypal for lieing he also said the harness was done by swap-wiring.com...who are these guys??