how to wire the trunk pop /w compustar

Hi
I got an question i had compustar 2W8000FMR installed on my 2002 Nissan sentra specV with dealer.
However i only have door lock and unlock installed and now i am trying to install the trunk pop myself

i did some research this is the 2000 -2006 Nissan Sentra Wiring Diagram
https://www.commandocaralarms.com/wiring/2000-2006/Nissan/Sentra/1268.html

and this is the manual come with my compustar



What i found out is the dealer connect the the Blue from CN4 at compustar unit to PURPLE / red and Blue/Bk to grey (unlock and lock)

which match the wiring diagram
however it not work when i try to connect the Voilet/Wh from CN4 to Red(-) the trunk release

All these 3(lock, unlock, trunk) wires goes to my SECU and all these function i have with my orginial remote

so all did is tap the trunk wire with PURPLE / wh but not work
i have double check my trunk latch and very sure it's red

Anyone have any idea why?
did i make any mistake or i miss some steps?
anything to do with the Aux2 on CN2 of my compustar unit?

very apperciate if anyone can help me

With many cars the doors have to be unlocked for the trunk release to work also if I remember correctly nissans need a very strong ground signal to get the trunk to open use a relay to do this

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shaip99 wrote:

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.. also if I remember correctly nissans need a very strong ground signal to get the trunk to open ..

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.. other vehicles only require a weak ground? I believe you are refering to is a high-current (ie. direct-wired) load. The PINK/BLACK(Trunk Release) wire, in pin 12 at the SECU, would be an example of this. It requires a relay to control the load, as it is the direct GROUND wire, from the solenoid.

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shaip99 wrote:

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With many cars the doors have to be unlocked for the trunk release to work also if I remember correctly nissans need a very strong ground signal to get the trunk to open use a relay to do this

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i have tried unlock and lock for trunk release and what do you mean strong groud signal ?
what i need to do to make that work?

loneranger wrote:

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shaip99 wrote:

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.. also if I remember correctly nissans need a very strong ground signal to get the trunk to open ..

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.. other vehicles only require a weak ground? I believe you are refering to is a high-current (ie. direct-wired) load. The PINK/BLACK(Trunk Release) wire, in pin 12 at the SECU, would be an example of this. It requires a relay to control the load, as it is the direct GROUND wire, from the solenoid.

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you mean the pink/black is the strong ground for trunk release?
do i need connect my compustar unit to this wire for trunk release?
if so which ping in my compustar unit

thank for reply

Violet/white at CN4 to relay 85, 12v+ at 1amp fused to relay 86, good ground via a chassis bolt to 87 and 30 to trunk release wire pink/black.

howie ll wrote:

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Violet/white at CN4 to relay 85, 12v+ at 1amp fused to relay 86, good ground via a chassis bolt to 87 and 30 to trunk release wire pink/black.

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sorry i am a noob first time doing this
i dunno where is the relay 85,87,30
is it in the compustar unit?

and

i have factary alarm with trunk pop already and my compustar unit was install by dealer
do i still need connect the 12+ lamp fused to relay 86?

No you buy a standard 4 or 5 pin relay, if you buy the 5 pin, 87a isn't used.

ok i think it's no in compustar unit
you said Violet/white at CN4 to relay 85
is 85 |TRNK/HTCH RELEASE|red in my secu? (that's where i tap the wire first time)but not work maybe i didnt do following
12v+ at 1amp fused to relay 86,
and
good ground via a chassis bolt to 87 and 30 to trunk release wire pink/black

i know where is the pink black in my secu but dunno about the relay 87 and 30

kinda confused here

please help me if you can
thanks


|       ITEM      |     WIRE COLOR     |POL|       WIRE LOCATION        |
|              12V|WHITE/ red           |+ |ignition harness            |
|          STARTER|BLACK/ white        |+ |ignition harness            |
|   SECOND STARTER|BLACK / YELLOW        |+ |ignition harness            |
|        IGNITION|BLACK/ red           |+ |ignition harness            |
|        ACCESSORY|white|+ |ignition harness            |
| SECOND ACCESSORY|WHITE/ blue          |+ |ignition harness            |
|       POWER LOCK|gray |- |Time Control Unit or SECU *1|
|     POWER UNLOCK|PURPLE / red          |- |Time Control Unit or SECU *1|
|       LOCK MOTOR|RED / black           |   |pin 15 at SECU *1           |
|     UNLOCK MOTOR|blue/red            |   |pin 13 at SECU *1           |
|    DISARM DEFEAT|WHITE/ red           |   |pin 14 at SECU *1           |
| PARKING LIGHTS +|wht/red or RED / blu |   |headlight switch or DKP     |
| PARKING LIGHTS -|org/blk   (hazards) |   |pin 7 at SECU *1            |
|       HEADLIGHTS|RED / yel(L), purple(R|+ |headlight switch            |
|     DOOR TRIGGER|*2   |- |*2           |
| DOME SUPERVISION|use door trigger    |   |             |
| TRUNK/HATCH PIN|RED / black *3        |- |trunk light or SECU *1      |
|        HOOD PIN|pink/black          |- |hood switch or SECU *1      |
|TRNK/HTCH RELEASE|red |- |release switch *4           |<--------------85??
| FCTRY ALARM ARM|lt. GREEN/ red       |- |pin 41 at SECU *1           |
|FCTRY ALRM DISARM|WHITE/ blue          |- |pin 30 at SECU *1           |
|       TACHOMETER|*5   |   |*5           |
|      SPEED SENSE|PURPLE / red          |   |instrument cluster          |
|       BRAKE WIRE|RED / green           |+ |brake pedal switch          |
|     HORN TRIGGER|WHITE/ green        |- |steering column or SECU *1 |
|           WIPERS|grn/red(L),grn/wht(H|- |steering column             |
| LF WINDOW UP/DN|grn/red - blue      |A |drivers window switch       |
| RF WINDOW UP/DN|RED / wht - red       |A |drivers kick panel          |
| LR WINDOW UP/DN|yellow - yel/blk    |A |drivers kick panel          |
| RR WINDOW UP/DN|grn/wht - green     |A |drivers kick panel          |
|        RADIO 12V|blue |+ |at radio     |
|     RADIO GROUND|     |   |             |
|     RADIO SWITCH|pink |+ |at radio     |
| RADIO ILLUMINATE|yellow/red          |+ |at radio     |
|       LF SPEAKER|purple - grn/yel    |   |at radio     |
|       RF SPEAKER|brown - brn/wht     |   |at radio     |
|       LR SPEAKER|orange - blk/pnk    |   |at radio     |
|       RR SPEAKER|gray - gry/red      |   |at radio     |

howie ll wrote:

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No you buy a standard 4 or 5 pin relay, if you buy the 5 pin, 87a isn't used.

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so you mean i need buy another relay chip to do it?
but my factory alarm has trunk pop function already
do i still need extra unit for my compustar to work?
cant just tap the wire from my secu?

ok here's what, do you have a switch on the dash somewhere to control trunk release, the sentras i'm accustomed to that come with factory trunk release normally do, the signal at the switch is low current ground that drives the factory relay,normally this works fine straight from the alarm no relay needed, if this is not the case and you are driving the actual leg of the trunk release solenoid, then you will need a single pole double throw relay, on the relay there will be pins labelled by numbers, you wil be wiring it like this, pin 85 to your violet/white wire from the alarm, pin 86 to a fused 12volts source, pin 30 to a good ground, and pin 87 of the relay to the solenoid wire from the car, pin 87a remains unused, if you're still unclear and you need more explanation although there really isn't much more except a diagram, you can post back, just to add, at any reputable electronics store near you, you should be able to purchase the relay that you need.

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COMMIT YOUR WAY TO JEHOVAH AND HE WILL ACT IN YOUR BEHALF. PSALMS 37:5

t&t tech wrote:

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ok here's what, do you have a switch on the dash somewhere to control trunk release, the sentras i'm accustomed to that come with factory trunk release normally do, the signal at the switch is low current ground that drives the factory relay,normally this works fine straight from the alarm no relay needed, if this is not the case and you are driving the actual leg of the trunk release solenoid, then you will need a single pole double throw relay, on the relay there will be pins labelled by numbers, you wil be wiring it like this, pin 85 to your violet/white wire from the alarm, pin 86 to a fused 12volts source, pin 30 to a good ground, and pin 87 of the relay to the solenoid wire from the car, pin 87a remains unused, if you're still unclear and you need more explanation although there really isn't much more except a diagram, you can post back, just to add, at any reputable electronics store near you, you should be able to purchase the relay that you need.

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yes you are right there is a trunk release switch on my dash i check the wire behind it's red and black and the red goes to my secu so i am able to do remote trunk pop with my factory remote

and right now i tried taping the Violet/white wire from my compustar to that red wire from trunk release switch on my dash to secu
which wont work somehow

so you mean if i have that switch i dont need extra relay but why it's not working
did i do wrong on connection?

the Violet/white from my compustar unit has -250ma trunk output

or should use yellow/white on my compustar unit which has -250ma also but it's AUX2

have you tried shorting the wire to a ground to see if it works, verify first that the signal is negative switched though, as i am not sure if the sentras you have are the same as the ones i work on, if the trunk does pop when you short to ground then make sure your alarm is signalling ground output when the auxillary is pressed, if it is and i doesn't work when you connect it directly then you will need the relay, but as i said in my previous post normally 200ma or so is enough to drive the pop, but then again that's the sentras i'm accustomed to. post back with your results.

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COMMIT YOUR WAY TO JEHOVAH AND HE WILL ACT IN YOUR BEHALF. PSALMS 37:5

sorry for late replay~being busy~
this is the picture of my swtich infront


behind is a ground(black) and a +12v (red)
so trunk pop when 12v connect to ground
i assume as long as my compustar unit send a ground signal to 12v my trunk will pop
however i am not quite sure my voilet/white from CN4 the compustar unit
is ground signal
because on diagram only says 250ma trunk output

and where should be best way to tap the wire tap direct to the trunk switch or my secu

that's what i'm talking about, that 250ma output will suffice to perform the pop, just connect your violet/whie wire to the constant twelve wire behind the switch, i can't say which is the best place to tap the wire, but at this point behind the switch it is the safest, easiest connection to make. And all the units that i know the signal output is negative, i'm not familiar with the unit you are speaking of though, but im almost definite that the signal would be negative, key word being almost. 

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COMMIT YOUR WAY TO JEHOVAH AND HE WILL ACT IN YOUR BEHALF. PSALMS 37:5

Yes, the Compustars trunk release output is negative.

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there you go.

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COMMIT YOUR WAY TO JEHOVAH AND HE WILL ACT IN YOUR BEHALF. PSALMS 37:5

You are holding the trunk release button on your transmitter for at least 3 seconds? On the Compustars, when you hold the button for 3 seconds, the doors will unlock, and then the trunk will pop.

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Thanks for the reply i got it work by connecting my violet/white to the +12v red
and yes holding 3 s will make it release and unlock ~
is possible to change the holding time?

Not that i know of.....It's meant to prevent you from accidently popping the trunk.

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got another question
this is my first time use aftermarket alarm i dunno if this is right ~
i lock the car with compustar remote then i manually unlock from inside open door but the alarm doesnt go on

shouldnt the alarm go on?
or that's what should be..
thanks for helping me out ~

yes the alarm should go off, first make sure your alarm is not in valet mode, secondly make sure you have the correct door trigger wire,  the colour wire i'm accustomed to since i've been doing sentras is RED / white you can find it in the driver's floor loom, test to verify.

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COMMIT YOUR WAY TO JEHOVAH AND HE WILL ACT IN YOUR BEHALF. PSALMS 37:5

also make sure you connect it to the correct trigger wire on the unit which in this case is also co-incidentally RED / white.

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COMMIT YOUR WAY TO JEHOVAH AND HE WILL ACT IN YOUR BEHALF. PSALMS 37:5

Also....after you arm the alarm. Allow 15 seconds or so for the alarm to set up before opening the door.

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everything work now :)
was in valet mode
shop turned it on last time i went for maintenance

really apperciated for the help

thanks~

The trunk release on G4 Cliffords was instant, and it could be made to not work when the alarm was armed, are there not any other aux outputs on that unit which work instantly which could be used instead. On G4 Cliffords, you could change the button functions around. Could this be done with this unit?  Thus use the trunk release button to work a different aux?