Electrical Another plea for wiring help

Bottomlesspit

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I am down to the last bit of wiring as I trace all the looms throughout the car. I am desperately trying too follow what should be a simple on but can't find any diagrams to help.
I am trying to trace the emergency brake switch wires. The switch has the light blue connector and a large gage black wire that ends on a loop terminal with bolt on the switch. The Blue wire is intact but the BLACK wire was cut at some earlier point. I cannot figure out where the black wire should go. It LOOKS like it might have gone to a plug that went to a seat or seatbelt connector....a flat gray plug....this plug has a brown wire on one terminal and a large and small black wire on the other. This plug was also cut at some point. It looks like the large black wires might have been connected together but not sure.
I just need to find the main wire that this black wire should be connected to.

Does anyone have a diagram that might show this wire/emergency brake switch? I would assume the black wire cannot be a ground since the blue wire is carrying a signal and the switch is used to complete the circuit to the instrument cluster Brake Light indicator.

oh please...help!!!
Thanks,
Ken
 
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Mustang5L5

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Mod Dude
Feb 18, 2001
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Black wire just grounds out. The EVTM doesn't have a good diagram to show it, but the electrical plan shows a ground at location symbol.

I have the console out of my car. Let me see if I can get a pic
 

Mustang5L5

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Mod Dude
Feb 18, 2001
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Looks like I was wrong. The black wire travels back with the purple and disappears inside the main harness.

In 1988, the wiring color was purple/white stripe instead of blue so that's why my wire color is different

536FE7CE-CF42-4BA0-AD21-202434BF05C5.jpeg
 

Bottomlesspit

I started the longest tech thread in the known uni
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Yeah, my wire is light blue/white stripe. So...that black wire is an unknown at this point? It 'seems' it travels up to a flat connector that goes to the seat somewhere....and joins another black wire in the same connector pin. I'm feeling I am not going to be able to figure this one out......
Thanks for the photo though...definitely what I'm looking at.
Ken
 

Mustang5L5

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Mod Dude
Feb 18, 2001
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Let me check the wiring diagram on the seat belt minder and see if the wiring is connected at all.

that black wire is simply a ground. It can ground anywhere really
 

Mustang5L5

Put lubricant all over the balls
Mod Dude
Feb 18, 2001
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Ok. According to the EVTM the seat belt minder switch and parking brake don’t share a ground.

1F8C0622-5031-45A9-A9A9-84482BB20CB9.jpeg


the seat belt minder goes direct back to warning chime module
870931B5-8BC0-42F8-BC03-D482D1971A87.jpeg


According to this, the parking brake grounds direct at locstion. Obviously this isn’t true, but nothing in the EVTM shows where it goes. As you can see, it’s just grounded in the wiring docs.

C9502BFF-98E6-433C-BBA5-DBCA765FE2D8.jpeg
 

Bottomlesspit

I started the longest tech thread in the known uni
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Thank you so much for the guidance and pictures. I guess, according to this wiring diagram, I just connect the black to ground. I sure didn't want to setup another issue with my fusebox after just replacing it with all it's wires. That was a lot of work but I was finally able to get all the connectors free from the block and replaced with my good stock wires. Don't want to do it again!!!
Thanks again, you are always soooo much help! This poor 92 just might run again someday.
Ken