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

Positive terminal splice help

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Old Apr 4, 2012 | 04:47 PM
  #1  
GerryCat09's Avatar
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From: Pennsylvania
Car: 1986 Trans Am WS6/1991 Firebird
Engine: 305 TPI/305 TBI
Transmission: 700R4 in both
Positive terminal splice help

Almost done correcting all the goofy wire splices in my 86' Trans Am, the last issue is what I assume to be ignition wiring. The PO had a fuse connector spliced in from the black wire coming from the cylindrical rubber piece there on the positive terminal. My question is what is it? Is that an in-line fuse that blew and they replaced it with a fuse connector and new fuse? I circled the part in the photo. My 91 Firebird is completely different, and won't serve as an example of how it should look, so if anyone has a picture of the same wiring from an all stock car that would be a lot of help too! The two orange wires in the background there have a connector which I assume clips onto the connector that used to be on the black wire leading from the part in question...
Attached Thumbnails Positive terminal splice help-p4042524.jpg  

Last edited by GerryCat09; Apr 4, 2012 at 05:17 PM.
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Old Apr 4, 2012 | 06:08 PM
  #2  
LAFireboyd's Avatar
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From: Las Vegas
Car: 1987 Formula (original owner)
Engine: 305 TPI
Transmission: T5
Axle/Gears: 9-bolt/3.45
Re: Positive terminal splice help

The black cylinder circled in your pic is a fusible link; it's stock. The wire coming out of the fusible link should go to a 20 amp fuse(probably next to the radiator). Then there should be an orange/black wire coming from that 20 amp fuse that connects to one of the orange wires you have sticking up there; one of those orange wires goes to the fuel pump relay--that's the one you want. This is the "hot at all times" power supply from the battery to the fuel injection system.

If there are/were two wires coming out of the fusible link, then the other one would go to the other orange wire.

Last edited by LAFireboyd; Apr 5, 2012 at 11:10 AM.
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Old Apr 4, 2012 | 11:08 PM
  #3  
GerryCat09's Avatar
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From: Pennsylvania
Car: 1986 Trans Am WS6/1991 Firebird
Engine: 305 TPI/305 TBI
Transmission: 700R4 in both
Re: Positive terminal splice help

That's what I needed to know, thank you! The previous owner chopped up the wiring to put an after market fuse in line, bypassing the factory fusible link. Hack wiring drives me nuts, so I'm fixing everything back to factory spec. I've already disassembled the connector on those two orange wires and repaired that, you'd never know it was chopped...so now the question is, is there any way to repair that original fusible link?
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Old Apr 5, 2012 | 11:09 AM
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LAFireboyd's Avatar
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From: Las Vegas
Car: 1987 Formula (original owner)
Engine: 305 TPI
Transmission: T5
Axle/Gears: 9-bolt/3.45
Re: Positive terminal splice help

Fusible links might be repairable/rebuildable, but you're probably better-off replacing it. And for a replacement, I'd doubt you'd find anything like the stock piece, unless from a similar used battery cable, maybe from a junkyard car. And in that case, you could just install the whole cable.

New OEM battery cables for thirdgens are no longer available, so outside of having a new cable custom-made(Innovative Wiring makes excellent custom cables), a used one is probably your only option. So if you can't find one at a junkyard, vendors like Hawk's, Thirdgen Ranch and House of Camaro all sell used parts that I believe come from their own inventories of used thirdgens. They don't advertise battery cables, but it stands to reason that, since they have the cars, they would also have battery cables from those cars, so maybe they'd have one that would fit your car.
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Old Apr 5, 2012 | 11:01 PM
  #5  
GerryCat09's Avatar
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From: Pennsylvania
Car: 1986 Trans Am WS6/1991 Firebird
Engine: 305 TPI/305 TBI
Transmission: 700R4 in both
Re: Positive terminal splice help

Yeah, Thats what I was thinking, I'm hitting on of the biggest pull-a-part yards in my area this Saturday, so with any luck I'll be able to grab the whole setup there.
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