Dashboard Connector Identification - JeepForum.com
 
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post #1 of 12 Old 06-11-2019, 08:00 PM Thread Starter
88YJtoCJ
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1988 YJ Wrangler 
 
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Dashboard Connector Identification

So I am at it again, trying to install some upgrades in the ol' Jeep. I got a donor Dashboard / wiring harness from a 94 Wrangler 6cyl w/Manual. I am trying to mate that to my 88 Engine Wiring Harness.


I have run into a couple of snags doing this. Namely the Ignition switch Always Hot 12V on the original dash harness terminated to the Bulkhead... On the new one, it seems to terminate on a 10 Pin connector on the passenger side of the jeep.... What is this supposed to plug into? I have no electronics on that side and cant seem to find a pinout of what these 10 pins do.



I have attached a picture of my mystery connector, and a continuity test from the BAT terminal of the Ignition Pigtail, to a Pin in my Mystery Connector.



I am tempted to run my own BAT wire to the terminal of the ignition switch, but that still leaves 9 pins of unknown in that connector.

Attached Thumbnails
connector.jpg   ignition-to-mystery-connector.jpg  

88YJtoCJ

White 88 YJ = $2000
Straight 6 = $1200
AX15 = $400
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post #2 of 12 Old 06-12-2019, 04:47 AM
1project2many
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The wiring diagrams and electrical component locators I have available do not show that connector. The 12V power feed is shown from bulkhead connector to ignition switch. How about a side view of the connector showing attached wires? Sometimes it's easier to locate or identify a connector in wiring diagrams using the wire colors.

Edit: I've looked at several Ebay wiring harnesses but the wires are always taped up right to the connector. Based on location and connector shape I started researching the hardtop electrical connector C303. I think you should check out this thread to see if that's what you're looking at. If so then I think you need to double check the fuse panel/bulkhead connector for that battery wire to the ignition switch.

There is also a thread here which has pictures of the connectors which may be helpful. Unfortunately I can't view the pictures at work due to website filters.
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post #3 of 12 Old 06-12-2019, 06:31 AM Thread Starter
88YJtoCJ
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Here is the side view. The Big red wire under my thumb runs in the harness direct to the Ignition Switch BAT Pin on the pigtail. It doesn't seem to be spliced anywhere, and has full continuity from this connector to the BAT Pin on the Ignition pigtail.
Attached Thumbnails
side-view.jpg   A3171ABA-68D4-4590-839E-22727AA28C65_1560371056588.jpg  

88YJtoCJ

White 88 YJ = $2000
Straight 6 = $1200
AX15 = $400
Sagging Springs = Priceless
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post #4 of 12 Old 06-12-2019, 10:53 AM Thread Starter
88YJtoCJ
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A couple more of the wires.

I just had a thought, could this be an aftermarket mod for a 2nd battery?


Edit: Second thought, could this have been a 2nd fuse box / accessory fuse box mod?
Attached Thumbnails
6C21CC36-5420-4B65-B543-893BEFB07587_1560358320355.jpg   9E4CF089-89F2-4A92-9894-573042101308_1560358355390.jpg  

88YJtoCJ

White 88 YJ = $2000
Straight 6 = $1200
AX15 = $400
Sagging Springs = Priceless

Last edited by 88YJtoCJ; 06-12-2019 at 01:56 PM. Reason: 2nd thought
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post #5 of 12 Old 06-12-2019, 02:48 PM Thread Starter
88YJtoCJ
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Does this make sense to anyone else? I Think there may have been a 2nd battery or second fuse box involved with the wiring harness here.


Edit: Nevermind, found picture of the connector online, still need to know what it went to originally.
Attached Thumbnails
Possible Battery Mod.jpg  

88YJtoCJ

White 88 YJ = $2000
Straight 6 = $1200
AX15 = $400
Sagging Springs = Priceless

Last edited by 88YJtoCJ; 06-12-2019 at 03:04 PM. Reason: wrong thought, found picture of the connector from 2 other harness shots online.
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post #6 of 12 Old 06-12-2019, 02:55 PM Thread Starter
88YJtoCJ
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Here are 2 shots from online, not my Harness personally, but the same connector.
Attached Thumbnails
shot2.jpg   this_one.jpg  

88YJtoCJ

White 88 YJ = $2000
Straight 6 = $1200
AX15 = $400
Sagging Springs = Priceless
88YJtoCJ is offline  
post #7 of 12 Old 06-12-2019, 07:44 PM Thread Starter
88YJtoCJ
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Ok, so I figured out where my power issue is. The bulkhead was split and rewired at some point. Instead of wired to the ignition BAT terminal, it is wired to the RUN Terminal of the Column Headlights Bright switch so that the Brights can be turned on when the Jeep is turned off. I will move that wire to a Run/Keyed source, and take back the BAT on the bulkhead for the Ignition switch, I pulled the pin from the Ignition switch and wiring in a new pin on the connector to the bulkhead.

I will give an update when I get the jeep running again.

I still don't know what my Mystery connector is for, and if it is wired improperly....
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post #8 of 12 Old 06-12-2019, 08:37 PM
1project2many
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Quote:
I still don't know what my Mystery connector is for, and if it is wired improperly....
That is a factory connector. It took a bit to find it in my YJ. That connects the underdash harness to the underhood harness. It's actually on the driver's side of center above the throttle pedal.
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post #9 of 12 Old 06-12-2019, 10:21 PM Thread Starter
88YJtoCJ
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not sure I follow. My Engine Harness connects to my Dash Harness via Fuse Box / Bulkhead. The only thing coming through at that location on mine is the PCM.

Like I mentioned, I am mating an 88 Engine Harness to a 94 Dash Harness. Is there a connector on the 94 Engine Harness that should be in this location? Do you know what the Pins for it control?

88YJtoCJ

White 88 YJ = $2000
Straight 6 = $1200
AX15 = $400
Sagging Springs = Priceless
88YJtoCJ is offline  
post #10 of 12 Old 06-13-2019, 07:12 PM
1project2many
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Quote:
Originally Posted by 88YJtoCJ View Post
Like I mentioned, I am mating an 88 Engine Harness to a 94 Dash Harness. Is there a connector on the 94 Engine Harness that should be in this location? Do you know what the Pins for it control?
There is a matching connector on a 94-95 harness. My guess is the PFI vehicles have it. It looks like the connector is labelled C112. Lots of searching led to this thread which has pictures of the connector, where it comes through the firewall, and ten out of twelve circuits identified.
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post #11 of 12 Old 06-14-2019, 03:28 PM Thread Starter
88YJtoCJ
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yep, that is the one. So it looks like I either need a 94-95 harness so that the gauges will work, or I will need to trace and move the wires from the 88 harness to the proper pins on the C112. Thank you so much 1project2many

88YJtoCJ

White 88 YJ = $2000
Straight 6 = $1200
AX15 = $400
Sagging Springs = Priceless
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post #12 of 12 Old Yesterday, 01:16 PM
1project2many
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Join Date: Oct 2018
Location: Lakes Region
Posts: 231
It's up to you how you do it. But I would suggest keeping some notes in a notebook. It's easy to mix and match solutions right now. But what happens when you have a problem in a couple of years and can't remember how you ran the wiring? Trust me, it's no fun.
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