350zOnJuice

iTrader: (3)

Sup guys im going to be installing a raptor shift light soon, I was doing research to see if I can find the tach wire to our car.

The shift light has 3 wires

1 is positive
2 is negative
3 tach wire

Does anyone know where this wire is located, I have anywhere from in the ecm to behind the dash but I need to be able to pin point this cable.

Thanks

PS: If you have a picture etc. of where I can find this wire let me know as well

KPierson

iTrader: (1)

You can find a tach signal in a variety of locations.

Crankshaft position signal
Camshaft position signal
Fuel injector output
Ignition coil output

I would go with the crank angle sensor, if it were up to me.

According to my 04 Z service manual the crank angle sensor is pin 13 on the ECU, a white/blue wire.

overZealous1

iTrader: (27)

not sure the signal from the crank pos sensor will give the signal you are looking for. or atleast one your gauge will be able to interpret. worth a shot though.

KPierson

iTrader: (1)

It is a square wave that pulses between 0 and 12 volts x amount of times per rotation. I use it to trigger my shift light on my G35, my Mini Cooper, and E250 work van.

I'm not sure how many pulses per revolution it is, one of these days I'll scope it again and find out.

350zOnJuice

iTrader: (3)

On my 2003 Service manual pin 13 reads, Crankshaft Position Sensor (POS). And the color code they have for the cable is W/L ?

KPierson

iTrader: (1)

w/l = white/blue!

350zOnJuice

iTrader: (3)

o lol, can I connect to that to make the shift light work?

If so, will it work accurately?

Thanks

KPierson

iTrader: (1)

It should work. The crank angle sensor is the most accurate representation of engine RPM in the car. Ignition and fuel injector signals can vary a little, based on timing (probably not noticable, but still).

I believe the crank angle is a 6 pulse per revolution signal, which your shift light should be able to 'read.' But, I may be wrong on this, as I still need to double check it with my o'scope.

350zOnJuice

iTrader: (3)

Appreciate you help, if you find out let me know.

Thanks

james840a

iTrader: (7)

Hi, im going to be ordering the same raptor shift light soon too. And wanted to know the same info about the tach signal wire.

350zOnJuice, did you get your shift light installed? Let me know how it works and what wire you tapped into for the signal.

Thanks

mrtomcat

iTrader: (3)

question: Why not connect to the build in Shiftlight wire? Should that not be the most accurate tach signal?

james840a

iTrader: (7)

I have a 5AT does not have a build in shiftlight, But im adding one in so when im in the sport mode i can shift manualy

350zOnJuice

iTrader: (3)

Im 5AT too, I dont that have factory shift light, should be getting raptor shiftlight soon

james840a

iTrader: (7)

Thats the one im ordering as well. When did you order yours? just getting an idea of how long it will take to recieve one

james840a

iTrader: (7)

350zOnJuice did you get your shiftlight installed?

350zOnJuice

iTrader: (3)

no, not yet sorry
have not had time

let me know how your install goes

james840a

iTrader: (7)

Hi, i installed my Raptor shift light and connected it to the Crankshaft position signal wire, but does not work. The light just stays on all the time. Anyone else have any ideas?

james840a

iTrader: (7)

ok, been looking at the 2004 service manual. the coil pack signal wire volt range is 0.1-0.4V when engine is running. The Raptor shift light volt input for tach is 5-12volt.
The crankshaft position sensot is 1.4V

This is Per the service manual

002-M-P

iTrader: (12)

Could you get something like the Greddy RPM signal converter and wire that into the 6 ignition wires at the ecu, then wire the brown rpm signal wire from the convertor to the shiftlight?

http://www.mohdparts.com/emanage/spe...translated.jpg

james840a

iTrader: (7)

Yes, i may have to use something like that. Were can you order that?