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

power junction block quest/ion

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Old Sep 5, 2004 | 02:45 PM
  #1  
Berlinetta's Avatar
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From: Rhome, Tx
power junction block quest/ion

my power junction block wiring has been a real quest... and i have a question. How many fusible links are supposed to be attached to the junction and where do they go? Also, is there supposed to be a fusible link on the wire coming from the positive battery terminal? Could some incredibly nice individual please take a pic so i can see how everything is supposed to be hooked up?
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Old Sep 5, 2004 | 02:54 PM
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From: Moorestown, NJ
Car: 88 Camaro SC
Engine: SFI'd 350
Transmission: TKO 500
Axle/Gears: 9-bolt w/ 3.23's
The vehicle in question is the rs in his sig (I think...). Hopefully someone here will have wiring diagrams, which are arguably more usefull then jsut a picture since all teh wires look teh same.
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Old Sep 5, 2004 | 03:38 PM
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From: Rhome, Tx
i saw a wiring diagram that said the fuel pump relay/ecm wire should not have an fusible link... but on my car, when you disconnect the one fusible link, the car wont pump fuel. I dont know.... im so $%#$% confused... im tempted to just buy another harness... this isn't the only screwed up electrical problem this car has.
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Old Sep 5, 2004 | 05:46 PM
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From: conway, s.c.
Car: 1989 Iroc-Z
Engine: 5.7L TPI
Transmission: 700R4
Hello Berlinetta,

I don't know if this would classify me as an incrediably nice person or not since you didn't specify which vehicle you are having the problem. But since I know this vehicle has a junction block I took a wild stab and came up with this. Besides I don't have sh*t for a ford f-150.
Attached Thumbnails power junction block quest/ion-ber.gif  
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Old Sep 5, 2004 | 05:58 PM
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From: Moorestown, NJ
Car: 88 Camaro SC
Engine: SFI'd 350
Transmission: TKO 500
Axle/Gears: 9-bolt w/ 3.23's
There is a 'fusable link' for the fuel pump. I think it gets its power from that junction block, or at the starter solenoid. The fuse is actually an in-line spade fuse in a housing on the pass side fender in the bay. Well, at least my car has the fuse for the pump there.

This thread was origionally on the tbi board so I went with the assumption that it was for the tbi vehicle.
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Old Sep 5, 2004 | 11:26 PM
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From: Rhome, Tx
dimented is right... thanks for the info trickster. BTW guys, why were fusible links used instead of a fuse in one of those little holders? I dont see why one can't switch over... they're both fuses and they should both do the job but a regular fuse is a lot easier to replace. just my thought

Also, my berlinetta has a regular fuse holder for going back to the fuel pump but my RS has the fusible link... WTF. Id rather do calculus based physics probs all day than try and figure this electrical $%#$ out... thanks for the help guys :hail:

Last edited by Berlinetta; Sep 5, 2004 at 11:29 PM.
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Old Sep 5, 2004 | 11:31 PM
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From: conway, s.c.
Car: 1989 Iroc-Z
Engine: 5.7L TPI
Transmission: 700R4
Probably because of location and conditions that they would be under on a constant basis. BTW, which car is this for since you have never said?
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Old Sep 6, 2004 | 12:54 AM
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From: Rhome, Tx
dimented said above... id originally posted it on the tbi board... its for the 91 RS
how would the locations and conditions affect the decision of whether to go w/ fusible links or not?
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Old Sep 6, 2004 | 06:32 PM
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From: Rhome, Tx
hey guys, i just found out something interesting... you know the ground wire that goes from the engine to the body of the car? I just found out that it's not attached on my car... its hooked to the body but when i went to see where its connected on the engine, the braided wire came up with the connector still attached... could this have been causing some of my fried wires, odd gauges problems?
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Old Sep 6, 2004 | 06:39 PM
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From: Moorestown, NJ
Car: 88 Camaro SC
Engine: SFI'd 350
Transmission: TKO 500
Axle/Gears: 9-bolt w/ 3.23's
Having the chassis ground is always good. Check all the rest of the grounds as well to be sure they have good contact.
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Old Sep 6, 2004 | 08:01 PM
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From: Rhome, Tx
the other grounds are good... pardon the question, but where exactly is this body-engine wire connect to on the engine... ill see tommorrow if anything gets solved
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Old Sep 6, 2004 | 08:04 PM
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From: conway, s.c.
Car: 1989 Iroc-Z
Engine: 5.7L TPI
Transmission: 700R4
It connects to the back of the right cylinder head..
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Old Sep 6, 2004 | 10:33 PM
  #13  
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From: Rhome, Tx
how significant is that ground wire?
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Old Sep 6, 2004 | 10:43 PM
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From: conway, s.c.
Car: 1989 Iroc-Z
Engine: 5.7L TPI
Transmission: 700R4
It also acts as a ground to the engine for your electrical components inside the car.
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Old Sep 6, 2004 | 10:50 PM
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From: Rhome, Tx
everything inside the car works... sort of.... a couple of my gauges act real screwy sometimes
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