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Unread 11-03-2012, 07:36 PM   #1
OilfieldCowboy
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Electronic speedo in my 87?

Wondering about the options out there for installing an electronic read speedometer in an 87, can a person purchase one out of a 92+ without the need to upgrade other electronics? Or would I need to go aftermarket?

Or would I just be better off using a standard SYE w/ mechanical speed output?

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Unread 11-03-2012, 07:52 PM   #2
rambo3489
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I am curious on this as well???
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Unread 11-03-2012, 08:01 PM   #3
zeus87gn
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Quote:
Originally Posted by OilfieldCowboy View Post
Or would I just be better off using a standard SYE w/ mechanical speed output?
This is what i did - I was trying to keep things simple - Mostly due to the fact that I didn't feel like adding the wiring needed to acomplish the electronic speedo - you would have to add it in from the TC to the dash
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Unread 11-03-2012, 08:04 PM   #4
OilfieldCowboy
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Quote:
Originally Posted by zeus87gn
This is what i did - I was trying to keep things simple - Mostly due to the fact that I didn't feel like adding the wiring needed to acomplish the electronic speedo - you would have to add it in from the TC to the dash
I'm not concerned about adding wiring, and prefer the idea of the super short SYE that comes only with electric speed sensor.
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Unread 11-03-2012, 08:15 PM   #5
zeus87gn
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You'll need to run 3 wires (if memory serves) to the TC - Hot, cold and signal, but I don't know which one is which in the plug
You'll need to get the wiring schematic for a 92-95 YJ and make sure how the wires are connected on both ends
I would think the speedo from a 92-95 would fit right into place and the illumination lights should pop right in
Get the connection plugs (pigtails) from whatever donor you find
Solder all the connections you can for durability/reliability
Good luck!
And post up your results - I would be interested to know how it turns out
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Unread 11-05-2012, 11:51 AM   #6
SSRx7
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For an electronic factory style speedo, you would have to have the factory style ecm. The ECM reads the signal from the VSS and then sends another signal to the speedo itself. That means completely different wiring harness. You are looking at a major PITA to do all that just for the speedo. You could use an aftermarket self contained unit such as Dakota Digital units that are out there, but they are alot of $$. This unit is for a CJ and is about $800:
(Pic from Jeff S on this forum).
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Unread 11-05-2012, 01:02 PM   #7
OilfieldCowboy
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Quote:
Originally Posted by SSRx7 View Post
This unit is for a CJ and is about $800:
(Pic from Jeff S on this forum).
Oh lordy that is sexy

That, with a flat dash in the YJ...

edit:

Just got off the phone with the Novak boys, most of the electronic installations they are doing in the older jeeps are using the pictured Dakota Digital setup.
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