91 Ford 7.3 Diesel Tach wire

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URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=43528
Printed Date: May 09, 2025 at 11:24 AM

Topic: 91 Ford 7.3 Diesel Tach wire

Posted By: Alberta_Mud
Subject: 91 Ford 7.3 Diesel Tach wire
Date Posted: November 21, 2004 at 11:42 PM

Cant find a suitable source for the tach wire input of a viper 550esp

Any thoughts?

Thanks

Replies:

Posted By: forbidden
Date Posted: November 22, 2004 at 6:32 PM

Where did you look so far and how many volts AC did the line meter?

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Top Secret, I can tell you but then my wife will kill me.

Posted By: Alberta_Mud
Date Posted: November 22, 2004 at 6:56 PM

I took the tan with yellow tracer comming off of my tach sensor and got nothing. Then i tried the other wire wich was solid green that was off the tach sensor. Nothing. How ever if i cut one of the wires the tach in the dash quits. I thought the meter might of been wrong but the alarm will not read the signal if there is one. Is there a way of maby taking it off the alternator.

I also tried these wires behind the instrument cluster too.

At a loss with the diesel install. The glow plug wait is all working right. It waits till the light goes out. The truck starts and immediatly quits due to no input saying it is running. Then tries this again twice.

Thanks for the response

Posted By: forbidden
Date Posted: November 22, 2004 at 7:01 PM

Are these lines inside the cab of the truck, if so then they are not the correct wires. Set your meter to AV volts and go to the coil pack in the engine. One wire will show between 1 and 8 volts AC on the correct tach wire. May be a dark green / yellow wire.

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Top Secret, I can tell you but then my wife will kill me.