I have a 91 camaro z28 that had a 305 tpi engine. I just swapped out the 305 for a 350 carb engine and sold everything from the 305 including engine, complete engine harness and ecm. All that was left was the auto tranny, harness for the headlights, wiper motor, etc. I bought a v8 SD harness off a member here that ended up being crap, so when talking to the member "POCKET" he gave me great advice on preping the harness and all i would need is a v6 harness "which my local junk yard has" to get the job done. I would need to lengthen and shorten wires but thats not a big deal. Picked the harness up for 12 bucks so that makes up for the junk 60 dollar harness i bought from a member. What i did so the harness wasnt a huge mess is cut where the harness seperates the outer part from the inner where the ecm goes. After cutting that i went through the whole harness picking out each wire that went to the ecm because in POCKET'S thread he said you will not need them. My harness is pretty slim now, and i have what i need "i think" to get the car running. Im on a deadline of one week to figure out this harness and have all the other things ready because its goes to the tranny shop and they need it running. On the slim harness i have now, theres a lot of wires that go to nothing and most of them are my gauges like oil pressure, coolant, tach, etc. Some go to other things but right now im trying to figure out the basic's. Starting from what i have can someone tell me what wires go where on the starter motor? I have the battery POS+ cable going to the alternator, then the other to starter, a purple wire, and one other red wire coming from the c100. I have 1 fat stud on the starter solenoid along with a tiny one, then one other stud on the motor itself. What goes where? And please no one give me charts, ive looked at every chart and it just confuses me. Im not an electrical guy at all, so i tend to follow better if someone can tell me where each one goes. Thanks

 

Should be a couple of red wires coming off of the starter that go into the C100.

Second, you need to explain what you need to keep and what you don't have any more to specifics can be gotten into. Starting with what year the engine harness came from.

And third, Pocket was slightly off in his description. There are a couple of ECM wires you need to keep, or you won't have a working speedometer. Unless you plan on putting in a cable speedo.

 

Alright for the starter, i have red wires from the c100 and a purple. Does the purple get connected? And then i have the positive wire from the battery. Basically what i need right now is the basic parts to get the car running and started, this harness is from a 1992 firebird v6 and my car is a 1991 350 carb engine with the stock serp belt drive and A/C. And everywire that ran to the ECM has been pulled/cut out of the harness. Every wire that goes to the c100 i left in place incase i needed it.

 

Well, you're kind of stuck now as you needed one of the yellow and one of the purple wires running to the ECM for the vehicle speed sensor, which would be disconnected from the ECM harness and tied to a buffer box which would provide your speedometer signal.

The purple wire running to the starter from the C100 is the wire that is connected to the ignition switch and starter enable relay (you can also delete the VATS now if you want to since you're not running an ECM any more). One of the red wires goes into the fuse panel and the other to the headlight switch, IIRC. You need the pink wire coming from the C100 for your ignition coil, I'll have to look up just which terminal in a bit.

However, if you need it, I also have a V6 harness from a 91 I'm not using, if you need it for the VSS signal. Another thing you can do for the VSS signal is to run the speed sensor wires through the C100 and possibly put the buffer box under the driver's side of the dash. Either way, now that you've cut the wires, you need to either replace them or go with a cable speedo, and the speedo cable hole in the firewall is probably blocked off.

 

Heres the starter motor, can someone tell me if im right? If not can you do a Paint version of the right way? Heres the pic i used http://www.supermotors.net/getfile/8...mgr-wiring.jpg. As for now im pretty sure i screwed up all my gauges so im planning on running some aftermarket gauges on a triple pillar and later on run them in the covans dash. If buying aftermarket gauges, would i be affected on seting up the gauges to work if i by accident i cut the wires like i did with the speedometer one? As for the harness, all i need hooked up to make my car start is the ones going to the starter motor and alternator?

 

Nope, red wires go on the same terminal as the battery cable (the top big one on the solenoid) so that they are always getting power. As I said before, those are the constant power feeds to the fuse panel, ignition switch, and the headlight switch.

As for the gauges, provided you left the C100 alone (as in you didn't cut anything), your gauges, other than the speedometer, will be okay. The rest go through the C100. All you need to do to fix the speedo is to run 2 wires into the C100 on both sides. The terminals may be available from a dealer if you are nice to a tech or the parts guy. After that, there are a couple connectors you need to buy with a speedo buffer box, and all of the connections are already under the dash.

You also need to hook up the large pink wire from the C100 (will be terminated in a gray connector with a white wire that also goes into the C100 for the tachometer signal) to the power side of whatever ignition coil setup (single or multiple coil) you're using, or you won't have spark.

 

Sorry for the late reply, i had my friend come over and wire the fuel pump relay, starter, and fan relays up. I ordered all new gauges for a pillar and covans dash so all the stock gauge wires i dont think i will be needing correct? Alright on the wiring i have some questions. When wiring the fuel pump relay, we decided to run new 12 gauge wire from the relay in the engine compartment to the back where the wires are for the pump. When we were back there i saw three wires, PURPLE, WHITE, & BLACK. Now can you explain what each color is for? Moving to the starter, we have the THICK purple wire that is "TOLD" to be ignition connected to the starter, we have the pos battery wire connected to the BIGGER stud along with the 2 thick wires coming from the C100. We tried to start the car and no power, we didnt have enough time to see what it could be due to it getting dark. I noticed on the factory replacement starter theres 3 studs, 2 being small ones and the other being the BIG one. One of the SMALL stud is closer to the engine while the other is further. We putting the PURPLE ignition wire on both but still no power when trying to start. What could be the problem to that? Also since i just put in the fan relays as well for fuel fans, we couldnt tell if its working properly or not. My thermo is for 180 degrees and its set up to automatically come on and off at the set temps. He did something to give the fans power and they did turn on, but when we put the keys in the ign and turned it to the start position the fans didnt turn on. Is it because none of those acc are getting power? There is a connector coming off of the pos wire that looks like this http://whiteproducts.com/images/sfh-...9%20Capped.jpg or something similar. If there was supposed to be a fuse in there and there wasnt at the time will that be one of my problems? We checked to see everything was getting power when the battery was connected and he said it was. Any ideas?

 

EDIT<<< I looked at that connector connected to the pos battery cable and it is a true connector with 2 tabs in total, one on each side. Its an oval shaped that looks really similar to the link in the other post. Also the wires going to it are RED and ORANGE

 

First, why would you be running 12ga wire to the fuel pump? That's bigger than what is on the starter solenoid, and your fuel pump shouldn't be drawing that kind of amperage if it's working properly.

Second, the white pump wire is actually the gray wire coming from the C100/C208 for the pump itself, the purple wire is the gauge sender wire, and the black one is ground, obviously. For both the pump and the sender.

Third, you WILL need ALL of the stock gauge wires unless you plan on running new ones, which is a headache I'm sure you'd like to avoid. They're pretty much already where they're supposed to be (except they probably need to be longer to reach the V8 senders), so leave them as is.

Starter should be: Big terminal on top of the solenoid gets the battery cable and the red wires with the fusible links, the purple wire goes on the innermost small terminal, and the starter motor wire should go onto the bottom large stud which a screw goes into instead of a nut. Make sure that the solenoid isn't upside down on the starter if you've replaced either and reused the other... There is a tab that's supposed to point down into the motor.

Check with a test light or otherwise that you have power coming into the fuse panel... Probe between one of the BAT terminals and ground. Also make sure that you have power at the ignition switch on the red wire (blue connector, I think). Also make sure you have all of the wires hooked up at the junction box by where your battery is. Some of them may have been for the ECM, but others are for the fuel pump and other things.

 

Okay everything else i understood but the starter motor. Only wires as of right now that are hooked up are the POS battery wire and red wires with the fusible links to the big terminal. The inner terminal i have the purple wire, and the outter terminel is nothing. The outter ones a bolt with a nut screwed into it like the other two. By starter wire, what do you mean? What color is that?

 

The wire coming out of the starter motor is a braided wire with a right-angled loop terminal on the end. Comes right out of the top of the motor housing. Generally gray or black, depending on what color the starter is painted, or can be copper colored if damaged or green if corroded.

I don't have a pic of mine to show you how it gets hooked up, and I can't exactly hook up the wires right now for a pic as the starter isn't attached to the engine and nothing is attached to the body of the car .

 

HMM thats weird, i never noticed that wire. Its actually coming out of the motor or the solenoid? Now ill go look again for that wire, but if i dont have it on the starter am i introuble? Or can i do something to fix it? Also if i do find that wire, where does it go to from the starter?

 

It's about half an inch from the tail of the solenoid, towards the other end from the flywheel end of the starter. It comes out of the motor and is bolted to the solenoid at the bottom terminal.

Define "no power"... Does the rest of the car have power and the starter isn't running, or does nothing work?

 

Oh are you meaning this?

 

By no power i mean when we put the key in the brake light came on, turn signals worked. When we went to the start position we got nothing. Were going to redo the wiring in the back for the fuel pump so ill update on that part later. For now were trying to get the starter to engauge when the keys in. So far what we ended the night off was testing a little. When i had the key to the on position the purple wire had power. When i turned it to the off position it had no power. Everything was connected exactly how you said it, except that braided wire. We couldnt figure out why it wasnt working

 

Nevermind, its there and connected.

 

Is the SECURITY light on? Follow the big yellow and purple wires under the dash... One will lead into a relay and turn green after the relay (the purple wire, I believe). At the relay, jump the purple wire to the green wire and then try to crank the engine over. You could have a problem with the VATS system disabling the starter.

I'll have to look in the 92 FSM to find out where exactly the relay is if you can't find it.

 

I have no idea where its located. I have a 1991 camaro but i bought the c100 harness from a parts 1992 firebird. So far the pump works when the ignitions on, and fans seem to work. If you can help me locate that relay id appreciate it.

 

Doesn't matter what exact year the car is... The dash harnesses and most item locations are identical due to interchangeability of the harnesses and parts between dash and body designs, and the wiring didn't change between 1990 and 92. I haven't looked it up yet, but, IIRC, the relay is up near the fuse panel behind the kick panel, above the door lock relay box and bolted to the body.

When you do find it, bypass it by jumping the 2 fat wires with a short piece of wire.

 

So when i do find it, i connect both the fat wires together?

 

Yes, the relay will have 4 wires, 2 fat ones and 2 skinny ones. Jump the fat ones together as jumping the small ones basically does nothing other than possibly damaging the VATS module.

 

What does the vats do? And how can you tell its working? Or not working?

 

VATS is the Vehicle Anti Theft System. On an unmodified car, it disables both the starter and fuel injection if the wrong key is put into the ignition. The system measures the resistance between the black pellet and the bare metal on both sides of the key. Wrong key, no pellet, system error result in a no-start, no crank, or no run.

Starter enable relay is probably bolted to the metal dash support just to the left of the steering column. The wiring for the relay comes out of the part of the dash harness that runs down and connects to the ignition switch, wiper switch, and the headlight dimmer.