Help in Finding Tach wire

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Mykro

Member - Posts: 1

Joined: July 11, 2004

Location: United States

Posted: July 11, 2004 at 7:36 PM / IP Logged

I am installing a combo alarm/remote start into my 1999.5 Ford Powerstroke 7.3L Diesel Truck

I cant' seem to find the Tach wire.. Could someone give me a clue to where it is?? The color of the wire is WHITE/ Pink

Much Thanks

Clean Install

Silver - Posts: 446

Joined: January 03, 2004

Location: United States

Posted: July 11, 2004 at 7:46 PM / IP Logged

locate the coils, on each coil there will be a common color.

if on the coils they all have RED / green wire then you would use the wire that is of a different color.

If we learn from each success and

each failure, then we can improve ourselves

jrilla

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Joined: November 19, 2002

Location: North Dakota, United States

Posted: July 11, 2004 at 7:53 PM / IP Logged

One source of mine says it is the WHITE/ pink wire at the center plug behind the instrument cluster.

Another source says:

Diesel tach is a WHITE/ pink and the diesel wait to start wire is BLACK/ pink (-), this wire MUST be diode isolated from the instrument cluster to keep the battery from draining. Both wires are located at the PCM or can also be located in the main harness that runs on the inside of the firewall to the left of the brake pedal.

Another source says:

Tach Wire Is Located In A 40 Pin Connector Mounted On The Firewall Behind Driver Dash Next To Two Other 40 Pin Connectors.

J Rilla

Owner/Installer

jrilla

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Joined: November 19, 2002

Location: North Dakota, United States

Posted: July 11, 2004 at 7:55 PM / IP Logged

Oh yeah be sure to measure the wire with a DMM before grabbing it. It should read roughly between 1 and 6 volts AC and increase when the gas pedal is depressed.

J Rilla

Owner/Installer

swamprat323

Gold - Posts: 1,335

Joined: September 22, 2002

Location: Florida, United States

Posted: July 11, 2004 at 7:56 PM / IP Logged

TACHOMETER|WHITE/ pink *6 | |instrument cluster or *3

*3 Tach can also be located in the main harness that runs on the inside of the firewall to the left of the brake pedal.

*6 Diesel tach is a WHITE/ pink and the diesel wait to start wire is BLACK/ pink (-), this wire MUST be diode isolated from the instrument cluster to keep the battery from draining 'see direct fax document #1090'. Both wires are located at the PCM or can also be located in the main harness that runs on the inside of the firewall to the left of the brake pedal.

when using the diode put band towards PCM

PCM is located on the left side of fire wall.

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Help in Finding Tach wire

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