Electrical Doing A "wire Tuck" On A 93 Lx. Left Frame Rail Side Harness Blk/wht 2 Into 1 Goes Where ?

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jrichker

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The picture shows the common ground point for the battery , computer, & extra 3G alternator ground wire as described above in paragraph 2. A screwdriver points to the bolt that is the common ground point.

The battery common ground is a 10 gauge pigtail with the computer ground attached to it.
Picture courtesy timewarped1972
ground.jpg


Correct negative battery ground cable.
56567d1230679358-positive-negative-battery-cable-questions-86-93-mustang-oem-style-ground-cable.gif


3.) The computer's main power ground (the one that comes from the battery ground wire) uses pins 40 & 60 for all the things it controls internally: it comes off the ground pigtail on the battery ground wire. Due to its proximity to the battery, it may become corroded by acid fumes from the battery.
In 86-90 model cars, it is a black cylinder about 2 1/2" long by 1" diameter with a black/lt green wire.
In 91-95 model cars it is a black cylinder about 2 1/2" long by 1" diameter with a black/white wire.
You'll find it up next to the starter solenoid where the wire goes into the wiring harness.

All the grounds listed in items 1,2 & 3 need to bolt to clean, shiny bare metal. A wire brush or some fine sandpaper is the best thing to use to clean the ground connections.
 

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mpcv2000

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Thanks for the reply but that's not it.
I remember those ground wires and I'm ok with them but the 2 - 16/18 Gauge Blk/Wht 2 in to 1 looks like they use to be in a connector but I can't find which one it was.

I'll try to find a 1993 5.0L LX wiring diagram to see what colors run on the left side frame rail.
 

mpcv2000

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Oh , we're maybe on something.
I know where is the windshield washer harness but there is also a test plug connector ?

So if it's the case this is 2 Blk/Wht wires going into 1 in a grey plug ( that I lost somehow ) or it wasn't there.

This plug is just there but there is nothing plugged on it ?

Thanks for the help.
 

mpcv2000

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I still haven't figured it out yet but the 2 into 1 Blk/Wht wires are in the same harness as the DRL "Day Time Running Light" harness & the Windshield washer harness + others .

?tn=1012751904



?tn=-1684850274



?tn=1953817490


All I have found is this :
Pin 40 & 60 are Blk/Wht and goes to ground , can it be the one I'm looking for ?

I'm not good are reading schematic and if they are only ground why the put them so far from the ECU or EEC what ever the name is ?

I'm not sure if you can see the picture of the schematic tho.

?tn=47720183
 
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