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

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Old Oct 19, 2005 | 06:34 PM
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From: webster
Car: 1991 Formula
Engine: 5.7
Transmission: 700R4
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hi i have a 91 formula and i may have wired the starter incorrectly. any insights on how to wire this thing properly. a crude paint program picture would be apreciated. or any kinda diagram. its a L98 350 by the way
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Old Oct 19, 2005 | 07:23 PM
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From: conway, s.c.
Car: 1989 Iroc-Z
Engine: 5.7L TPI
Transmission: 700R4
All wires with big terminal lugs go to the big top post on the starter solenoid. The wire with the small terminal lug goes to the small post marked "S" on the solenoid.
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Old Oct 19, 2005 | 07:30 PM
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From: webster
Car: 1991 Formula
Engine: 5.7
Transmission: 700R4
now the ones that go to the big ternminal are the red one, and then the black one gets ground somewhere right?
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Old Oct 19, 2005 | 07:35 PM
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From: Maine
Car: 1988 Camaro
Engine: 1988 chevy pickup 350 TBI (rebuilt)
Transmission: 700r4- Bowtie overdrives
Axle/Gears: 2:73's
yea the big red wire is the Positive wire and goes to the large post, and the black wire goes onto the small post which is negative.
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Old Oct 19, 2005 | 07:41 PM
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From: webster
Car: 1991 Formula
Engine: 5.7
Transmission: 700R4
like this? i recall there being more wires involved
Attached Thumbnails Starter-starter-diagram.gif  
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Old Oct 19, 2005 | 08:05 PM
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From: conway, s.c.
Car: 1989 Iroc-Z
Engine: 5.7L TPI
Transmission: 700R4
Originally posted by 83Chevy_Camaro
yea the big red wire is the Positive wire and goes to the large post, and the black wire goes onto the small post which is negative.
The small post is not a negative wire, it is what closes the circuit when you turn the key. That wire goes to the Park/Neutral switch in an automatic and the Clutch Start safety switch in a manual car. The starter is grounded to the engine by contact. BTW, that small black wire is actually purple.

Last edited by Trickster; Oct 19, 2005 at 08:16 PM.
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Old Oct 19, 2005 | 08:09 PM
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From: webster
Car: 1991 Formula
Engine: 5.7
Transmission: 700R4
ok, heres my situation we had to remove the starter to install some headers. once i pluged it back in and ran the car it ran for a couple seconds. the fuel pump was going nuts on and off on and off then the car just lost all power.. whats going on with it is something not ground?
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Old Oct 19, 2005 | 08:19 PM
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From: conway, s.c.
Car: 1989 Iroc-Z
Engine: 5.7L TPI
Transmission: 700R4
Did you remember to reconnect all the ground wires on the back of the cylinder heads. Another thing to look at is whether or not you melted any of the wires against the headers.
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Old Oct 19, 2005 | 08:20 PM
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From: webster
Car: 1991 Formula
Engine: 5.7
Transmission: 700R4
back of the cylinder heads? are those the grounds for the starter?
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Old Oct 19, 2005 | 08:26 PM
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From: conway, s.c.
Car: 1989 Iroc-Z
Engine: 5.7L TPI
Transmission: 700R4
No, those are grounds for the ECM and a lot of the other major circuits in the car. The starter does not have a ground wire, it is grounded by contact with the engine which in turn is grounded by the big ground wire from the battery to the engine block.
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Old Oct 20, 2005 | 01:48 PM
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From: webster
Car: 1991 Formula
Engine: 5.7
Transmission: 700R4
Ok dude today i messed with the car a bit. the way i had it set up was the little red wire on the far right small terminal, the black wire from the battery and the two red wires that come from the wire harness where all on the middle big nut on the starter. this can't be right.

Heres a pic of what i have going on where do these wires hook up to? oh and by the way i did totally fry the one black wire that goes to the battery and i will be fixing that...
Attached Thumbnails Starter-untitled.gif  
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Old Oct 20, 2005 | 05:16 PM
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From: conway, s.c.
Car: 1989 Iroc-Z
Engine: 5.7L TPI
Transmission: 700R4
Here is a picture of where you are supposed to put your wires. From the drawing you supplied you have the wire from the battery going to the bolt for the support bracket on the front of the starter. All wires with the large terminal lugs and this includes the big wire from the battery go on the post in this picture that is labeled #12. The wire with the small terminal lug goes on the small post that is marked #1 in this picture. It is the small post closest to the engine block.

Last edited by Trickster; Oct 20, 2005 at 05:20 PM.
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Old Oct 20, 2005 | 05:21 PM
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From: conway, s.c.
Car: 1989 Iroc-Z
Engine: 5.7L TPI
Transmission: 700R4
Here is a picture of where you are supposed to put your wires. From the drawing you supplied you have the wire from the battery going to the bolt for the support bracket on the front of the starter. All wires with the large terminal lugs and this includes the big wire from the battery go on the post in this picture that is labeled #12. The wire with the small terminal lug goes on the small post that is marked #1 in this picture. It is the small post closest to the engine block.
Attached Thumbnails Starter-stw.gif  
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Old Oct 20, 2005 | 06:47 PM
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From: webster
Car: 1991 Formula
Engine: 5.7
Transmission: 700R4
ok i have it wired correctly now. i went and got a new wire from the battery. Now the thing thats happening is when i start the car the starter stays on and keeps winding the flywheel. i called a friend up whos a mechanic and he thinks i may have shorter the starter silinoid. sound familiar? i guess i'll replace that and go from there unless you have any ideas, but i do have it hooked up correctly now and the car gets power. so i finally was able to roll my windows up for tomorrows rain storm lol
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