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Old May 11, 2020 | 08:34 AM
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Default Help with wiring

I tried doing a search but couldn’t find any diagram of what I’m looking for. I found these wires like this after digging into the car because the starter drive is kicking out and getting stuck on the flywheel but not turning the engine (all I hear is the starter motor spinning as if the drive wasn’t kicking out). I figured it might be due to an ignition/VATS problem. Also I was looking at the clutch switch because the starter will spin without the clutch depressed.
So I’m guessing the yellow is a constant 12v but idk what the brown is or why the hell the previous owner has it wired like this nor do I see a plug under the dash it plugs into. Also I can’t find where the smaller White plug is suppose to go.

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Old May 11, 2020 | 08:45 AM
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If the starter spins, it's not a VATS problem. VATS disables the vehicle by preventing the starter relay from from engaging the starter at all.
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Old May 11, 2020 | 08:51 AM
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Ya that’s why I was thinking but I’m all out of ideas at this point. This is starter #3. The bendix kicks out and meshes with the flywheel, I can hear the starter motor spinning but when I look under the car the bendix is still meshed with the flywheel. I loosen the starter bolts and it retracts on its own. This car was a bad purchase lol
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Old May 11, 2020 | 10:53 AM
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Try putting a couple washers between the starter and the mount. You generally have to shim a starter to get it to line up perfectly.
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Old May 11, 2020 | 11:08 AM
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Ya that’s why I was thinking but I’m all out of ideas at this point. This is starter #3. The bendix kicks out and meshes with the flywheel, I can hear the starter motor spinning but when I look under the car the bendix is still meshed with the flywheel. I loosen the starter bolts and it retracts on its own. This car was a bad purchase lol
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Old May 11, 2020 | 09:08 PM
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I always thought VATS killed power to the fuel injectors but it would still crank and briefly start for maybe three seconds.

Rick
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Old May 12, 2020 | 08:42 AM
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I can't tell where those wires are located in the car, but they are definitely for some aftermarket accessory that was removed. They are not stock.
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Old May 12, 2020 | 08:55 AM
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Originally Posted by B52bombardier1
I always thought VATS killed power to the fuel injectors but it would still crank and briefly start for maybe three seconds.

Rick
There are different versions of vehicle theft deterrent systems used in a variety of GM vehicles. VATS in 4th generation f-bodies disables the car by removing the ground from the coil side of the starter relay to prevent the starter from operating; and by turning off the fuel enable signal to the PCM to prevent the engine from continuing to run if it gets started somehow.

Other vehicles operate much like you thought. They have a system called Passlock (called VTD - Vehicle Theft Deterrent in GM manuals) which does not require a resistor pellet in the ignition key like VATS does. It works by using Hall effect sensors in the ignition cylinder to detect the rotation of the key and disable the fuel injectors if it sees a problem. The car will start but stall moments later due to lack of fuel. The idea is that the sensor will detect normal rotation only if the correct key is turned in the ignition. If the ignition is forced or the cylinder damaged by a slide hammer (a common way to steal a car) then the sensor won't see the proper rotation.

Last edited by WhiteBird00; May 13, 2020 at 10:37 AM. Reason: grammar
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Old May 12, 2020 | 07:27 PM
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Ok, thanks. Its always good to learn something new.

Rick
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Old May 12, 2020 | 08:38 PM
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If you’re going to shim the starter don’t use washers. Use starter shims!
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Old May 13, 2020 | 12:36 PM
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I have a shin set for it. I did attempt to shim it with a few different shims but I guess I will stack them. I had the same problem last year with my last starter. Ended up replacing the battery and did a warranty exchange at advanced auto for the starter. It worked for about a week or two then returned to the same situation. Flywheel is not missing teeth and does not appear to be warped. Maybe advanced auto starters are just crap who knows.

In regards to the wires, they both seem to be meshed in with the factory wiring harness. As far as electronics go there were no aftermarket alarms or anything like that I could see being spliced in
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Old May 14, 2020 | 12:36 PM
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The white wire is the cruise control depression switch for the clutch

The blue one is the cruise control depression switch for the brake pedal

If your car is a hard top with crank windows its possible that some one installed an aftermarket cruise control system

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Old May 14, 2020 | 12:59 PM
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Originally Posted by chrysler kid
The white wire is the cruise control depression switch for the clutch

The blue one is the cruise control depression switch for the brake pedal

If your car is a hard top with crank windows its possible that some one installed an aftermarket cruise control system
Weird. No it’s a ws6 T-Top and power everything. I have 2 switches on the brake pedal and one switch on the clutch. I haven’t ever tried the cruise control to see if it works. I got the car and drove it like 10 times then parked it and started doing paint jobs and cleaning up the motor bay
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Old May 14, 2020 | 01:46 PM
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More photos of pigtails the harness is taped in with the brake switch harness



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Old May 14, 2020 | 01:55 PM
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Also I removed the “jumper” wire on the blue plug and the car would turn on but NOT turn the starter over. I placed the “jumper” back in and got the starter to engage however it grinded on the flywheel for a second then the bendix got stuck while meshed with the flywheel and the starter free spins again
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Old May 16, 2020 | 10:21 AM
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Those pictures are much better. The size and color of the wires will help confirm what they are for. (It's still hard for me to tell what they are.) In the first pictures, I see copper; which lead me to believe the plug had screw terminals. The plug is stock - but copper should not be showing on a stock terminal. Those have seen some MAJOR abuse.

What year/type of car is this? (We are also seeing the brake pedal switch in your pictures vs. the clutch.)

For example, the clutch switch on a manual car should have a Dark Green and a Purple/White Stripe wire involved:




If you register on AutoZone.com, you can get access to the full set of GM wiring diagrams in their Repair section. ^
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Old May 16, 2020 | 11:10 AM
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Originally Posted by wssix99
Those pictures are much better. The size and color of the wires will help confirm what they are for. (It's still hard for me to tell what they are.) In the first pictures, I see copper; which lead me to believe the plug had screw terminals. The plug is stock - but copper should not be showing on a stock terminal. Those have seen some MAJOR abuse.

What year/type of car is this? (We are also seeing the brake pedal switch in your pictures vs. the clutch.)

For example, the clutch switch on a manual car should have a Dark Green and a Purple/White Stripe wire involved:




If you register on AutoZone.com, you can get access to the full set of GM wiring diagrams in their Repair section. ^
ya the first pictures that show the copper on the black wire is just a small piece of wire the previous owner used as a jumper to connect the terminals on the blue plug.

I took a photo of the brake switch because both plugs are taped and wire looked into that harness. I tried looking at where the wires ran too but I lose them in the main harness under the dash on near the fuse panel.

my car is a 1996 Firebird ws6 M6

also the wire colors are
blue plug: yellow and brown
white plug: black w/white and tan
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Old May 17, 2020 | 11:43 AM
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Originally Posted by chrysler kid
The white wire is the cruise control depression switch for the clutch

The blue one is the cruise control depression switch for the brake pedal

Originally Posted by Bp1987
also the wire colors are
blue plug: yellow and brown
white plug: black w/white and tan

These don't seem to match up. ... and this is wierd:

Originally Posted by Bp1987
the previous owner used as a jumper to connect the terminals on the blue plug.


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Old May 17, 2020 | 12:36 PM
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So I found one.
the blue plug with yellow and brown goes to the clutch start switch. Still looking for the small white plug with the black/white and tan small wires


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Old May 19, 2020 | 08:02 PM
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The small white one should go to the switch at the top of the clutch pedal.
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