putting a tach in? - Diesel Bombers



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  #1  
Old 09-30-2011, 11:17 PM
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Default putting a tach in?

what are you guys tapping into to run a tach on these 1st gens?
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Old 10-01-2011, 02:26 AM
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Originally Posted by mnwild_05 View Post
what are you guys tapping into to run a tach on these 1st gens?
if you run an isspro like this Isspro 4k Tach they run off the dampner via magnet and receiver they work slick too
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Old 10-01-2011, 12:51 PM
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Originally Posted by big bad diesel 416 View Post
if you run an isspro like this Isspro 4k Tach they run off the dampner via magnet and receiver they work slick too
A while ago I looked at the installation instructions for the receiver and magnets. However, for trucks like mine with a cam position sensor at the outside surface of the dampner they would not work. What am I missing?
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Old 10-01-2011, 02:44 PM
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In your '92 CTD, look under the dash, right above the fuse-box, taped to the steering column. There, you'll find a four-wire plug. Connect the 4K ISSPRO tach there. DO NOT use the ISSPRO adapter as it isn't needed.

READ: Let's Screw-Up Your Steering Column With A New Tachometer and Gear Shifter! - Dodge Diesel - Diesel Truck Resource Forums

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Old 10-01-2011, 07:12 PM
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Originally Posted by BC847 View Post
In your '92 CTD, look under the dash, right above the fuse-box, taped to the steering column. There, you'll find a four-wire plug. Connect the 4K ISSPRO tach there. DO NOT use the ISSPRO adapter as it isn't needed.

READ: Let's Screw-Up Your Steering Column With A New Tachometer and Gear Shifter! - Dodge Diesel - Diesel Truck Resource Forums

I found the connector. However, the 4 plug wire colors on mine are grey (with blue tracer), black, orange, and black again. No red wire? I wonder if the factory just used a black piece of wire instead of red??

The OEM factory tachometer plug offers the following:

- 18ga Black = +12vdc for gage lights
- 20ga Orange = 12vdc Common
- 18ga Red = Switched +12vdc
- 20ga Grey w/light blue tracer = Tachometer Signal From PCM

I read through that thread completely. Great documentation you did! How has that ISSPRO tach worked out for you since you have had it now for a few years?
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Old 10-01-2011, 08:36 PM
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The tach still works just fine.

I would suggest you skin the insulation of the wires a bit just to see if the outer surface has faded. You may find the colors are there just under the surface.
Else, look at the 1st schematic image of the 3rd post in that thread and check the tach-plug at the top right. You'll notice the plug has a unique shape. Hold your plug like the plug presents in the image to see where what wire is from top to bottom.

Last edited by BC847; 10-01-2011 at 08:41 PM.
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Old 10-01-2011, 09:06 PM
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Originally Posted by BC847 View Post
The tach still works just fine.

I would suggest you skin the insulation of the wires a bit just to see if the outer surface has faded. You may find the colors are there just under the surface.
Else, look at the 1st schematic image of the 3rd post in that thread and check the tach-plug at the top right. You'll notice the plug has a unique shape. Hold your plug like the plug presents in the image to see where what wire is from top to bottom.
Ok, I think I just found my answer in this tach install sticky link below at 1stgen.org
It is in fact a black wire but it is listed as the color red in the service manual. Someone just got their wires crossed


1stGen.org • View topic - tach install
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  #8  
Old 11-20-2017, 09:44 AM
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Default 4BT & 6BT Diesel Wireless Tach Kit

Autohack's Wireless Diesel Tachometer Kits make installing a diesel tach on any diesel truck a breeze! Fall special - Complete wireless tach kit now available for only $79.95 through 11/30/17.

Please visit autohackguys.com for more details.
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