nissan second starter wire

Must Nissan vehicle, equipped with second Starter wire, i this will be ok to connect starter wire from remote starter system to both starter wire from the vehicle? or i must have to use a relay for the second starter wire? thanks for help

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Johnnynguyen

For the millionth time, NO!!.
Why do you think the factory has two SEPARATE wires?

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

Also the single starter output wire from most R/S units don't have the current capacity, = 1 burnt out brain.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

which model Nissan? You may not even need this wire.

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MECP Master Certified Technician
ASE A6 Certified Technician

I've seen a LOT of cracked out things happen from morons just hooking both starter wires up like that without a relay. seen one car come in from another shop that the trans wasn't shifting right even!

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A DMM is a beautiful thing.

MECP Advanced Installer Certified.

Do NOT do this: https://yfrog.com/5xnissanignitionharnessj

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Advanced

ANYONE WHO THINKS USING THOSE CONNECTORS TO INSTALL ANYTHING SHOULD BE BACKHANDED!

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A DMM is a beautiful thing.

MECP Advanced Installer Certified.

years ago a company called Designtech supplied wireing info, a bigbook with wire codes and special wiring scematicsOne of their specific instruction was to join or connect both start wires together on nissan vehicals. Although now this is outdated information I never had a problem doing this. Infact Ihave an old 98 pathfinder wired up this way and it works fine for several years. Now adays most newer starters have programable out puts so its not necassary to do that any more.

hurleyloser wrote:

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which model Nissan? You may not even need this wire.

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Always connect both wires they serve a purpose, if it wasn't needed you think nissan would have bothered. Use a relay and trigger the cold start.

t&t tech wrote:

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hurleyloser wrote:

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which model Nissan? You may not even need this wire.

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Always connect both wires they serve a purpose, if it wasn't needed you think nissan would have bothered. Use a relay and trigger the cold start.

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Hurleyloser is right. There is a simple way of testing the second starter wire to see if it needs to be powered up. If it doesn't rest at ground when the key is on it means that it is not connected to anything in the car. If it's not connected to anything in the car it will not need to be powered up. This is the reason that many installers think it works when they connect the two together. If the wire rests at ground, a relay is required to power it up.

X 2 with Beegbie.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

Really i didn't know this, howard why didn't you mention this before?  

I'm with the sentiment but I don't think it's right, both starters should see a ground at rest, usually the second starter will run items such as a high pressure fuel primer, systems which only use 1 starter wire usually have the tach sensed by the ECU. As soon as it detects the engine turning over, the primer cuts out.
I wish some one who knew more would tell me why, I still can't see the point of a second starter, though obviously a second ignition(dumping during crank) I can see.
Strangely enough a lot of Europeans don't even have an ACC, those functions are now controlled by the CAN system as soon as driver's door is opened....lovely.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

Actually Darren I'm sure beegbie is wrong!
If it's not going to ground whether key is on or not shouldn't make any difference but be careful, European Sprinters show the starter as open circuit, it's feeding an ECU and that's where you pick up the starter.
Again if the wire isn't going to ground, what's it doing there?
Manufacturers watch every penny...why put the wiring in. And before you say it's logical to have one loom for different models, back in the mid-90s we were installing AC in Northern European home market M/Benz that were going to Africa. The power steering (or alternator) bracket only had room for that item. we had to order a special bracket, you'd think on a single casting like that Mercedes would order 1 size fits all, I know Toyota and Mits did back in the 80s when they didn't have AC in Northern Europe and they were pre-wired for AC.

The real answer is to get your hands on a circuit diagramme and see what's going where.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

howie ll wrote:

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Actually Darren I'm sure beegbie is wrong!
If it's not going to ground whether key is on or not shouldn't make any difference but be careful, European Sprinters show the starter as open circuit, it's feeding an ECU and that's where you pick up the starter.
Again if the wire isn't going to ground, what's it doing there?
Manufacturers watch every penny...why put the wiring in. And before you say it's logical to have one loom for different models, back in the mid-90s we were installing AC in Northern European home market M/Benz that were going to Africa. The power steering (or alternator) bracket only had room for that item. we had to order a special bracket, you'd think on a single casting like that Mercedes would order 1 size fits all, I know Toyota and Mits did back in the 80s when they didn't have AC in Northern Europe and they were pre-wired for AC.

The real answer is to get your hands on a circuit diagramme and see what's going where.

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I agree with you on getting your hands on diagramme and I will work on that and post back. But, if your using a example of mercedes in the 90's to explain why Nissan has one wire in its ignition harness thats not used your losing me. My only proof is a few installers that I work with that spend all day every day at Nissan dealerships installing remote starts do it this way. How would you explain some resting at ground and some not? Maybe you should do your homework before being so sure of yourself that I'm wrong. I'm not looking for confrontation here, I'm trying to share useful information to save others time and money.

So, im thinking howard's an installer like myself and he is a damn good one if i might say so, and beegbie on the other hand spends time with installers, lol, i'll take howard's side any day, it just doesn't seem logical, so if a wire was suspended at the end of it all, shouldn't the circuit be open all the time? Why the logic of only when the car is running, starter wires do rest at ground except for when there's voltage through the cranking cycle, am i right howard?

Beegbie, I apologise, not after confrontation, just wondering what that second starter wire was for.
I was just quoting Mercedes as an example of a car maker using different for example mounting brackets for different spec. models rather than 1 size fits all.
The other example being the Saab 9-3 of around 10-7 years ago, speaker grills in the doors but no wiring, thus why is there a second starter wire?
In practice I'd still relay them apart. The guys working for the car dealerships have a certain level of liability protection which we don't.
For the $1 or so a relay costs me, I'll buy that protection and that's my bottom line.
P.S. NOTHING is open circuit on a regular key turned ignition switch.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

t&t tech wrote:

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So, im thinking howard's an installer like myself and he is a damn good one if i might say so, and beegbie on the other hand spends time with installers, lol, i'll take howard's side any day, it just doesn't seem logical, so if a wire was suspended at the end of it all, shouldn't the circuit be open all the time? Why the logic of only when the car is running, starter wires do rest at ground except for when there's voltage through the cranking cycle, am i right howard?

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I agree, Howard is a damn good installer and a asset to this forum. This is the reason that i'm suggesting you guys at least consider the possibility that I may be right. You wouldn't want to mislead everyone on here? Instead, your coming up with every reason why I couldn't be right. As far as your question above, think of it this way... On the cars that need the relay, the ground your reading when the key is on is probably the ground on the other side of a relay coil. When that relay is not there the wire will not test as ground. Pretty simple?

Beegbie you're right in that I'm prepared to listen, I thought about the coil earlier and dismissed it but you're quite correct, unless KP or Oldspark or Idiot corrects me, a wire going to the coil won't see a ground.
The original post was about commoning the two wires, I still won't take the chance.
I apologise for trying to sound like the devil's advocate but I still fuse everything, diode protect etc.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

Blimey beegbie, just thought about that one again, rule formulation:-
Take a DMM to each starter wire, cut BOTH and see if they are common at the key switch, also see the current draw on cranking position, if the load on BOTH is 20 amps or less, you won't need a second relay and you can tie them together.
Problem is you and t&t both fully understand what I'm getting at here, would an amateur?

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

How bout someone else chime in here?

 Once it measures voltage at the switch i connect it! Period

 On to your thought howard i've never tested both to see if they were common at the switch although if they are,  me, you and beegbie are wasting our time, lol, but then again i've seen it in scubies where two ignition wires are tied into one from oem specs, i've never figured why, have you?

Peugeot does that trick with two ignition wires, the problem being that during an R/S if the alarm is on you have to relay isolate (5 wire)the second because it feeds back and triggers the alarm! Why do I love them.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

The two wires are not connected. The second starter wire comes on before the first if you turn the key slowly. I never connect the two together for the reason that Howard gave in the second post in this thread. If Nissan wanted them connected they would have connected them. I always use a relay (when the wire rests at ground).