need help installing a viper 791xv alarm

[nissan_s15_240sx]

I have a viper 791xv alarm that im trying to install and im not sure what all the wires go to. I have almost all of them figured out, but there are a few that im not sure what they hook to.

[Silvia007]

If you have most hooked up or know where they go, why not list the ones you don't have so we know where to start.

[nissan_s15_240sx]

O.K... I've figured out almost all of them but four.

1.Primary harness (H1) pin number H1/3 white/blue (-)Remote start activation input.

2.Secondary harness (H2) pin numbers..

pin number H2/1 light green/black (-)factory disarm/special accessory output.

pin number H2/2 green/white (-)factory rearm.

pin number H2/6 (-)second unlock output.

I'm just not sure if I need these hook up or, and if I do, I don't know where they go. I really appreciate you trying to help... Umm just let me know if you can help me. I've got almost all of it hooked up but that.

[Silvia007]

I have the exact same alarm as you and the following wires that you mentioned, I did not use being I have a S13. For the factory disarm, rearm, we don't have facotry alarms so those will not be used. For H1/3, factory is 2 so if you press the * buttom on the remote twice, it'll remote start the car, press it twice and it'll turn it off. If you want to say press three times or so to start or turn off your car, then you can hook that up to a switch. H2/6, unless you want to say, only unlock your driver door, and when pressing say channel 4 on your remote, it'll open the rest of the car doors. Wiring is a bit of a pain but that's what it's for. I just use one output to open both my doors.

[nissan_s15_240sx]

O.K. let me make sure I understand what your saying. Now as for H1/3, if i'm doing remote start on my car do I need this to hook to anything? As for H2/1 and H2/2 you said that they would only be used if you have a factory alarm right? and that H2/6 is used if you want to use it to unlock you doors? O.K... well I guess I only need to know if I need H1/3 for remote start, and if I do how it needs to be hooked up. Thanks for all of your input!

[iam_so_slow]

hmm i also need help installing that alarm i was wondering if you can help me out lol im tring to find which wires to tap...etc.... umm if you can help point me in the right direction taht would be great... i have a wiring diagram and everything i just dont know which wires to matchhttp://www.zilvia.net/f/showthread.php?t=103650thats my thread i made...-thanks

[nissan_s15_240sx]

ok I got it all hook up, well for the most part. Everything on the alarm side works but the remote start system is not working properely. When I go to do remote start it will try to start the car but wont unless the key is in and turned to the run position. If you could tell me what wires go to what on the ignition that would help me out a bunch, like green.the two red wires,the two pink wires, ect. Because I dont think i've got them wired right.Also I cant get it to tach learn so that it will know when the car is running. Please if you could look on your car to see where the wires go I would appreciate soooo much!

[iam_so_slow]

hey nissan s15 can u help me out w/ my wiring =\ i dont dont where to start

[nissan_s15_240sx]

O.K. this might help you, this is all the wires you will need for the install. But my problem is figuring out what wires on the alarm go to these wires but anyway here you go. If you have any better luck than me let me know.

12volts____white____+____ignition harnessstarter____black/white____+____ignition harnesssecond starter____black/yellow____+____ignition harnessignition____black/red____+____ignition harnessaccessory____blue____+____ignition harnesspower lock____orange/black____+/-____driver kick panelpower unlock____same wire____parking lights____red/blue____+____back of dash dimmerdoor triger____red/white____-____courtesy light or door triger switchtrunk/hatch pin____red____-____switch or light in trunktachometer____yellow/red____AC____ECM passenger kick panelbrake wire____red/green____+____brake pedal swichhorn trigger____green/white____-____steering coulmn

That is all the wires you will need to hook up the alarm...but as I said i'm not sure where they all go. If you should find out where they go please let me know.
Modified by nissan_s15_240sx at 11:10 PM 3/20/2006

[nissan_s15_240sx]

O.K.

today I went out and checked all six of the main harness wires to see what powered what, and I discovered that the three wires that go to my ignition to power it loose their power after the remote start is done. So my car will almost start but then die because the ignition looses power. What do you make of this. Any suggestions?

[nissan_s15_240sx]

O.K. iam_so_slow I think i've got it all figured out. I;m going to go right now and write down what wires on the alarm go to what wires on our 240sx, and then i'll get to you and write them down. Now do you have a automatic or a 5 speed? let me know because I put this alarm on a 5 speed. If you do have a automatic dont worry, the only difference in wireing that I can tell is one wire, the neutral safty swich. So let me go get this compiled and I will post the information I have to you.

[Silvia007]

Sorry guys, I was out for a day or so. I'll get that info asap. I'm doing some work on my car, trying to bring it back from storage so I'll get all that stuff written down. It should be available tomorrow evening. IN the mean time I'll try to get something up right now.

[Silvia007]

By the way, mines installed on a 5 speed with a SR.

[iam_so_slow]

ok cool!!!! yeah i got a 5spd w/ a sr =))) let me know thanks i appreciate it ALOT

[nissan_s15_240sx]

O.K. I got everything working but now in 5th gear it wont go over 5000 RPM's. Its fine in all other gears and neutral, but in 5th gear it wont. Does any one know what it might be?

[Silvia007]

Ok, here's how to hook up the remote start relay pack for the 791.

[Silvia007]

wat a pain in the but. I did much too good of a job on wiring. Took me 2 hours to undo all the tape, zip ties, tape, then individual tape and finally heat shrink. Lucky for you I needed to install new dash bulbs anyway. Make sure you ground the neutral switch to enable start on your car. Oh also the clutch switch needs to be modded. I just made it so that I don't need to step in the clutch to start my car. I much like it that way and I "NEVER" leave it in 1st gear when I drive so make sure you do the same. This is why remote starts on manual cars are illegal.

For the rest of the system, if you still need help, I'll clarify on the instructions. It's rather simple but if you are really really clueless, I'll try to make a makeshift wiring diagram like above for ya.

[Silvia007]

O.K. I got everything working but now in 5th gear it wont go over 5000 RPM's. Its fine in all other gears and neutral, but in 5th gear it wont. Does any one know what it might be?

I thought we have rev limit in 5th gear at 5k RPM.

[nissan_s15_240sx]

I'm not sure if it's the rev limiter or not. It does this even if im sitting still. Like today I was trying to see if I could figure out what it was, so I put it in 5th gear with the clutch in and reved it up and it wouldent go above 5000 RPM's. Now as soon as I took it out of 5th gear it was fine. Also on that note when I did this today I kept it reving and took it out of gear and the car died, and when I restarted it I couldent get it to rev up at all untill I put it back in 5th then back out again. I don't know what to make of it.

[iam_so_slow]

hmm...i think its your rev limit can you go past 5k in other gears? and neutral w/o having your gear in 5th?

cool good info.... just wondering where is the red with white strip going to spliced to the red

also what slicing stuff do you guys use like the taps?

did anyone get like the other harnesses too?lol can anyone be kind enough to post where the other harnesses go too please?-thanks

[nissan_s15_240sx]

I'm not sure if it's the rev limiter or not, I guess I never noticed if it did that in 5th gear or not. I know it has a cut off in 5th, I just thought it was higher RPM's. I've had it topped out to the limiter befor, I just diden't notice if that's where it cut off or not.

Primary Harness (H1)

O.K. As for the other harnesses here's how I hooked them up.On (H1) The only ones I used were

H1/2-WHITE, light flash out put. I hooked it up to the red/blue wire at the back of the dimmer swich.

H1/5-GREEN, (-) doortrigger input, zone 3. I hooked this wire up to the red/white wire at the courtesy light, or interior light.

H1/6-BLUE, (-) multiplexed input, zone 4. I hooked this wire up to the light in the trunk, The negative wire at the light (I think it was soid red) either way it will show a (-) signal when the trunk is open and none wnen it is shut.

H1/8-BLACK, (-) chassis ground, I hooked this and the sirens black ground wire to the dash support behinde the dash, but any body or chassis with bare metal will work.

H1/10-BROWN, (+) siren output, I hooked this wire up to the red wire that comes off your siren.

H1/11-RED, (+) constant power input, Ihooked this wire up to the white wire at the ignition.

H1/12-RED/WHITE, (-) channel 2 validity out put, This wire is not needed, but I ran it to my trunk to power a trunk popper.

Secondary Harness (H2)

H2/3-VIOLET/BLACK, (-) channel 4 output, This wire is not needed, but I ran this wire to my left side door for a door popper to open my door by remote.

H2/4-WHITE/BLACK, (-) channel 5 output, This wire is not needed, but I ran this wire to my right side door for a door popper to open my door by remote.

Door Lock Harness, 3-pin Connector

1-GREEN, I did not use this wire.2-EMPTY.3-BLUE, I did not use this wire.

Remote Start Primary Harness, 7-pin Connector

This connector plugs into the relay satelight and then into the alarm.

Heavy Gauge Inline Connector (Key Switch INterface)

1-PURPLE, (+) output to starter (starter side) You need to cut the black/white wire and connect this wire to the part going to your starter.

2-GREEN, onboard starter kill (key side) You need to connect this wire to the other side of the wire you just cut, going to the ignition. (I just unsodered the black/white wire from the ignition and sodered the green wire directally to the ignition.

3 & 6-RED WIRES, (+) high current 12V input, I hooked these wires to the white wire on the ignition.

4-ORANGE, (+) output to accessory circut, I hooked this wire up to the blue wire from the ignition.

5-PINK, (+) output to primary ignition circut, I hooked this wire up to the black/green wire from the ignition.

7-PINK/WHITE, (+) output to second ignition circut, I hooked this wire up to the black/yellow wire from the ignition.

8-RED/WHITE, (+) high current 12V input, This wire just loopes around and does not need anything done to it.

Remote Start Secondary Harness (H3), 5-pin Connector

H3/2-GRAY, (-) hood pinswich Input, zone 1. hook this wire up to the hood pin swich. You'll need to install this under your hood so when it is opened it will trigger your alarm.

H3/3-BROWN, (+) brake shutdown wire, I hooked this wire up to the red/green wire at the brake pedal.

H3/4-VIOLET/WHITE, tachometer input wire, I hooked this wire up to the yellow/red wire at computer. The right wire will read 6-7 volts AC when the car is running.

H3/5-BLACK/WHITE, (-) neutral safety swich input, I hooked this wire up to the swich that came with the alarm. Then I hooked the other wire that was on the swich to the wire that comes off your E-Brake (I think it's yellow/green) And ofcorse you'll have to find where you want to mount the swich but either way there is only one wire that is comeing from your E-Brake. Now I did this so if I remote start my car and anyone tries to steal it, you cant drive it with the E-Brake on so if you put it down the engine will shut off.

Well that should about cover everything. If you have anymore questios just ask and i'll see if I can help.

[nissan_s15_240sx]

There now, If that doesent help then I dont know what will LOL.Good luck!

OHHH I almost forgot to tell you, it's ok to use taps for most of the install but on the heavy gauge inline connector dont use them. For that I would only soder your connections and then heat shrink or tape them. Thats what I did for all my connections but you dont have to.

[Silvia007]

I 2nd the solder part. My buddy spent $800 dollars on his viper alarm installed from the factory, they used taps and it lasted a good 1.5 years. After that, I had to go back and redo all his wiring. Not cool. Nissan_s15_240sx did a great job with the directions. I doubt it would get much simpler then that.

[iam_so_slow]

wow cool thanks for all the info guys!!! this is great stuff...hopefully ill be done w/ the alarm by next week =D

[nissan_s15_240sx]

Thank you Silvia007. I was trying to make them as simple as I could so that any one looking at them wont wire up something wrong, you know what I mean. And also thanks for all of your help as well. You've been a lot of help to me on this install too. Hopefully iam_so_slow wont have any problems on the install. I've got everything wired up and it works great. My only problem now is the thing with my car not going above 5000 RPM's in 5th gear. I swaped ECU's from both my cars, that diden't change anything. So I unhooked all the connectors from the alarm in the remote chance that it may have been the problem, that diden't change anything either. So I stumped. Well anyway i'm glad I did the install my self. I've always done the work on my cars, from simple things like oil changes to motor swaps. now I havent done an SR motor swap by myself, but I swaped KA's from one car to another. But that's easy, it's pretty cut and dry. My second 240sx I had an SR in. But I made the mistake of going to ENJUKU RACING in Orlando for the swap. I dropped like I think around $12,500. into this swap. it was pretty clean but it kept F'ing up. First one of the pistons blew out. Sooo... Ihad to replace them, I replaced them with weise co pistons. Then it kept having a fuel issue where it was running so rich that it was actually pumping gas through the motor and out the tail pipe. You could litereally wathch the gas hand drop. So I would never let them touch my car, but they do have about the cheapest prices on SR parts. I a year or so i'm going to be getting some money up and plan on going to a place in Tampa ,FL called XAT Racing. I'm going to be doing there stage 4 swap which will put me in the 400-450RWHP, so i'm looking forward to that. For now i'm just working on the looks of the car. If either of you are interested I can try to get a good picture of it. My camera isen't that good. Well thanks again for the help.

[iam_so_slow]

ok im doing my wiring right now...umm i was wondering when you say hook up you mean splice right?

[nissan_s15_240sx]

Yeah. syo can cut the wire your trying to connect it to. Or you can just take some of the wires insulation off with out cutting it, but it's much easyier to just cut the wire, strip off some of the insulation from both halfs, reconnect them then connect the wire from the alarm to them. Then soder it, then tape or shrink rap it.

[iam_so_slow]

hmm i also have a few more questions =XX

umm i was wondering where is the courtesy light? =Xalso like for the H1/6 wire where do i find the trunk wires? do they run next to the driver side door like a red and a blue or something?

umm....as for the ignition wires is it ok if i splice further up the wire like the white wire turns into a white/red iirc... i spliced the white/red i hope its ok...-thankss

[nissan_s15_240sx]

Ijust tried to post an anser but it eraced all I put down so I have to do it agaon.

[nissan_s15_240sx]

O.K this is my second try to post this.

Your courtesy light is the light that is in the roof of your car, but you dont have to connect the wire there. You can connect it to the driver side door swich. It's behind the back pannel that the rear passengers rest their arms on. All you need to do is take a flat head screw driver and pry on it a little. It is held in with little clips, it'll pop off and you'll be able to get to the swich. It will have three wires comeing off of it, ablack wire, a blue/white wire, and a red/white wire. Connect H1/5 to the red/white wire.

As for H1/6, you'll need to extend the wire to be able to run behind the rear pannels and the trunk pannels so it can reach the light in your trunk. On the light in your trunk there will be two wires, one red/black, and one that is solid red. Connect H1/6 to the solid red wire.

And as for the ignition wires, it's fine if you connect them further up on it. I made all those connections right near the ignition swich its self. (where the key goes into the ignition.) And your white/red wire is your constant 12V+, you'll want to connect the two large red wires, and the smaller red wire from H1/11 to this wire. Well that should about cover your questions but if you have any more let me know and i'll help if I can.