viper 5900 08 nissian titan

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howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: July 06, 2011 at 7:32 AM / IP Logged

Now at Kreg's prompting I've read this post. Install without the second starter then wait until November.

gsxrwild

Member - Posts: 9

Joined: July 04, 2011

Location: Florida, United States

Posted: July 06, 2011 at 5:25 PM / IP Logged

So I left the second starter wire hooked up. I was just wondering what is was for. Now I was wondering if anyone has any Idea where the wire for the tach is inside the truck. the on from the coil worked but it's causing a cylinder miss fire on the coil that I have it hooked up to.

Jon D

howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: July 06, 2011 at 6:20 PM / IP Logged

Try :-

Injector port, each has two wires, one colour is common to all, any of the other colours.

Back of tachometer.

Camshaft position sensor. Three wires, one is ground, second is 12v+IGN. third is the one you want.

gsxrwild

Member - Posts: 9

Joined: July 04, 2011

Location: Florida, United States

Posted: July 06, 2011 at 6:23 PM / IP Logged

I know that I can tap into the injectors but I'd like to try to find a tach wire inside the cab. I just don't know which wire to hook up to inside behind the gauge cluster. Thanks for all the help.

Jon D

howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: July 06, 2011 at 6:26 PM / IP Logged

The tacho will have FOUR connectors. Use a DMM.

1) 12v+ on IGN

2) Ground

3) Illumination (probably) 12V+ on lights

4) Tach.

How are you testing.

howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: July 06, 2011 at 6:28 PM / IP Logged

Just out of interest I couldn't pick up the tach at the rear of the instrument panel on my own Nissan, I went to the engine management but I knew the pin-outs. If you don't have that info or by the sound of this post you don't know how to test you obviously didn't test your ignition loom, go to an injector or the camshaft position sensor.

gsxrwild

Member - Posts: 9

Joined: July 04, 2011

Location: Florida, United States

Posted: July 07, 2011 at 6:31 AM / IP Logged

Set the multi-meter to ACV or AC voltage (12V or 20V scale is OK).

Attach the negative (-) probe of the meter to a good chassis ground.

Start and run the vehicle.

Test the wires you suspect of being the vehicle tachometer wire with the positive (+) probe of the meter.

The meter will read between 1V and 6V if the wire is the correct one.

Jon D

howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: July 07, 2011 at 6:57 AM / IP Logged

Correct.

howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: July 07, 2011 at 7:01 AM / IP Logged

DEI list any fuel injector, not white (that would be the common colour to all).

dasbogie

Silver - Posts: 514

Joined: September 30, 2006

Location: Pennsylvania, United States

Posted: July 08, 2011 at 2:53 AM / IP Logged

Your DLPK should give you tach output on the violet/white wire. I have used it in on the titan without trouble and many other nissans. That is inside the vehicle and will probably be relatively close to where you have the brain of the viper.

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Disclaimer: *All information on this site ( the12volt.com ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information.