Electronics Need help wiring something up? Thinking of adding an electrical component to your car? Need help troubleshooting that wiring glitch?

Wiring Gurus, Help me ID & connect some items, photos for reference.

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Old May 14, 2012 | 08:55 AM
  #1  
FRMULA88's Avatar
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From: IL
Car: 1988 Formula
Engine: 421 Little M block
Transmission: TH400 w/brake
Axle/Gears: 9" 4.30s, Wilwood discs, 28X10.5-15
Wiring Gurus, Help me ID & connect some items, photos for reference.

I am almost done with re-wiring but I have a few items to clarify.

I switched to carb and mechanical fuel pump.. also deleted the A/C , heater, & power steering.


Cleaning up the electric harness I believe the items in the first picture are no longer needed.. I checked the shop manual wiring diagram; These are the fuel pump relay and electronic spark control module. Please confirm.

The second picture: I have heavy gage red cable & it connects to the C100 fitting at the A4 position so it is the ignition lead .. does this connect to the battery junction box with a fusible link?

The third picture: I have this heavy gage red wire with terminal fitting. I cannot remember where this goes, and I cannot ID in the wiring diagram. I believe is it part of the ignition circuit ?..


help please

Thanks
Attached Thumbnails Wiring Gurus, Help me ID & connect some items, photos for reference.-img00339-20120513-2106.jpg   Wiring Gurus, Help me ID & connect some items, photos for reference.-img00341-20120513-2132.jpg   Wiring Gurus, Help me ID & connect some items, photos for reference.-img00340-20120513-2131.jpg  
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Old May 14, 2012 | 12:00 PM
  #2  
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From: Mississauga,Ont,Canada
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Transmission: T56 w/ lots of goodies
Axle/Gears: 8.8, Posi, 4.10, 31 Spline
Re: Wiring Gurus, Help me ID & connect some items, photos for reference.

im just gonna take a guess here. First pic i hav no clue what they are. Second pic I would say keep it as Im pretty sure I had the same wire in my carbed car and it was needed. Thrid pic looks like the connector that goes to the AC wiring in the engine bay as Im sure I had that in the last car I stripped for parts

Like I said I could be wrong but its worth a shot at looking into these
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Old May 14, 2012 | 01:11 PM
  #3  
FRMULA88's Avatar
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Joined: Dec 2002
Posts: 1,592
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From: IL
Car: 1988 Formula
Engine: 421 Little M block
Transmission: TH400 w/brake
Axle/Gears: 9" 4.30s, Wilwood discs, 28X10.5-15
Re: Wiring Gurus, Help me ID & connect some items, photos for reference.

really... no one knows... the first picture I deduced from my shop manual last night but wanted re-assurance..

the others?

I am pretty sure the one from the C100 has to go to the battery junction box.. I just want to be sure.

The others ? well if no one knows I can power up the car and see what happens.
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Old May 14, 2012 | 08:36 PM
  #4  
FRMULA88's Avatar
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Joined: Dec 2002
Posts: 1,592
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From: IL
Car: 1988 Formula
Engine: 421 Little M block
Transmission: TH400 w/brake
Axle/Gears: 9" 4.30s, Wilwood discs, 28X10.5-15
Re: Wiring Gurus, Help me ID & connect some items, photos for reference.

anyone anyone ?

77 views and no one has a clue?
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Old May 14, 2012 | 08:46 PM
  #5  
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Re: Wiring Gurus, Help me ID & connect some items, photos for reference.

first one is the esc module, it maybe a maf burn off relay, fuel pump relay or fan relay double check the wire colors vs schematic.
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Old May 15, 2012 | 07:18 AM
  #6  
FRMULA88's Avatar
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Joined: Dec 2002
Posts: 1,592
Likes: 31
From: IL
Car: 1988 Formula
Engine: 421 Little M block
Transmission: TH400 w/brake
Axle/Gears: 9" 4.30s, Wilwood discs, 28X10.5-15
Re: Wiring Gurus, Help me ID & connect some items, photos for reference.

Originally Posted by tunedperformanc
first one is the esc module, it maybe a maf burn off relay, fuel pump relay or fan relay double check the wire colors vs schematic.
Corrrect: the wire colors match up to the schematic.

I need to address the remaining 3 wires.

Heavy gage red from the C100 fitting... I believe this needs to connect to battery junction block in order to complete the ignition circuit. so far the only other connections I have at th junction are the battery pig tail and the alternator lead (charging wire)

Heavy gage red with special fitting . I can't for the life of me remember where this goes? or if I even need it?

Tan (possibly was white) wire at ignition harness >
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Old May 15, 2012 | 09:10 PM
  #7  
FRMULA88's Avatar
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Joined: Dec 2002
Posts: 1,592
Likes: 31
From: IL
Car: 1988 Formula
Engine: 421 Little M block
Transmission: TH400 w/brake
Axle/Gears: 9" 4.30s, Wilwood discs, 28X10.5-15
Re: Wiring Gurus, Help me ID & connect some items, photos for reference.

I figured out the situation and am going to share what I learned.

I jumped the red wire from the C100 to the battery junction block and viola ! everything works ! the lights, the dash, the stereo etc all came to life but most important the starter cranks the engine !

the red wire with the terminal end is battery hot Since I have no need for it I will back trace it and remove it.

I also have a 2 spare switched ignition wires (left over from the fuel pump relay and ESC module) perfect, because I can use one for my Derale dual fan control box. this will allow the fans to shut off when the engine is stopped.. and I can also wire a over-ride switch to operate fan #1 manually at any time.

so I was on the right track along. Although it seems I am going the opposite direction with Carb and mechanical pump for my purpose less is more.
Attached Thumbnails Wiring Gurus, Help me ID & connect some items, photos for reference.-2012-05-15-001.jpg   Wiring Gurus, Help me ID & connect some items, photos for reference.-2012-05-15-002.jpg  
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