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Unread 08-11-2009, 08:19 PM   #1
acat
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1990 YJ Wrangler 
 
Join Date: Jun 2006
Location: IOWA
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speedometer plug in on 92 4.0

I am doing a 4.0 swap on my 90 wrangler and installing the dash gauges etc. out of the 92 donor jeep. Does anything plug into the speedometer side of the tach speedometer cluster. I plugged the main harness into the tach side. there is a little hole in the center of the back of the speedometer that looks like something could plug in there. I can't seem to find a plug under my dash to fit it though. It doesn't look like its for a cable either as I understand that 92s don't use a cable. I am using all the 4.0s wiring as well so if something goes there I should have it, just need to locate it. As of now I have only one plug going into the sped tach cluster. I still have two plugs dangling under the steering column that I can't remember what they go to. they don't seem to go to the sped, tach though. also, how many plugins should there be behind the engine gauge cluster. I only saw one when I put it back together but these extra plugs make me wonder. They are probably just blank plugs because I marked everything that I unplugged in the disassembly that wasn't obvious as to where they go.

Thanks for any help

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Unread 08-11-2009, 09:04 PM   #2
93jeepyj
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Im pretty sure there was only one for the speedo/tach cluster and then another one for the other gauge cluster. There may be other plugs ther for factory fog lights and the wiper and heater for the hard top if the donor jeep had that stuff.
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Unread 08-12-2009, 05:28 AM   #3
Alfons
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1992 YJ Wrangler 
 
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The tub harness for the 92 has a different connection to the tach/speedo grouping than what you have on your harness. There are also differences in the wiring/fusing between the two tub harnesses, including differences in the pinouts for the bulkhead connection from the engine harness to the fusebox.
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Unread 08-12-2009, 05:39 AM   #4
acat
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I switched out all wiring. I have no 2.5 liter wiring remaining in the jeep.
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Unread 08-12-2009, 02:57 PM   #5
Alfons
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If you changed all the wiring, the 92 tub harness has a connector that looks like this picture - it plugs into the back of that assembly. It provides the power and signal to the tack, speedo, "idiot lights", etc.

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Unread 08-12-2009, 03:44 PM   #6
bustednuckles
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Quote:
Originally Posted by Alfons View Post
If you changed all the wiring, the 92 tub harness has a connector that looks like this picture - it plugs into the back of that assembly. It provides the power and signal to the tack, speedo, "idiot lights", etc.


is the 2 ignition feed wires the ones that give power to the speedo and tach? i'm confused on wiring my swap. are they 12 volt?
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Unread 08-12-2009, 06:01 PM   #7
Alfons
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1992 YJ Wrangler 
 
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92 Jeep wiring was all 12 volt with the exception of signal wires which would typically be some voltage less than 12 if the sender was a resistor of some variety or it could be a pulse train from other sensors.

The two "Ignition Feed" lines would be providing 12 volts for 2 different circuits in that physical grouping. This is a picture of the source of those two wires (if you have the original 92 harness, these 2 "feed" wires are part of that harness.).

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