Question on starter wiring
So there are three terminals on the starter. A large terminal for the positive battery cable, a small one for the purple ignition wire and the other large terminal that powers the starter motor. This terminal also has the yellow wire which leads up to the coil then splits off to the fuse box thru a resistor wire.
The way I understand it, when the ignition key is turned to START, power is sent thru the purple wire which activates the solenoid which engages starter motor. Power is then sent up the yellow wire to the coil providing 12 volts. Once the motor starts all power is killed to the starter and the resistor wire feeds 9 volts to the coil to keep the motor running. right? (68' C-10) Assuming all above is correct, I wired up my starter by replacing the yellow resistor wire with 20 gauge yellow wire. That way I get a full 12 volts to my Mallory distributor which calls for 12 volts. The yellow wire also goes down to the starter as originally wired up. Not sure that was even necessary since I am was getting a full 12 volts from the fuse box. With the new wiring, when I turn the key to the ON position (not START) the starter makes a winding noise then promptly blows my fusable link. I ending up cutting the wire from the coil down to the starter. This all made sense since that yellow wire was sending voltage to the starter on the side that engages the starter motor. So finally here's my question, Why doesn't that happen with the OEM wiring?? You would think that power to the coil would also send power to the starter motor right? |
Re: Question on starter wiring
Should be four terminals, Large for the battery cable, below that for motor power from the solenoid, small for the purple from the switch, small for the yellow to the coil.
Switch energizes the purple to engage the solenoid, solenoid contacts across the battery to motor terminals, and also sends power back up the yellow to the coil. If the yellow was hooked to the motor terminal, it would try to power the starter motor through the switch and overload the circuit blowing the fuse. I believe the two small terminals are marked s for start (purple) and I or R for ignition (yellow). |
Re: Question on starter wiring
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The yellow wire is not the resistor wire, the resistor wire is the one which goes to the bulkhead connector and the "R" terminal is isolated from the purple wire. When you wire an HEI or similar dist eithe run the wire to the ignition unfused terminal on the fuse block or remove the resistor wire from the bulkhead connector and wire it there no need to go to the starter.
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Re: Question on starter wiring
Hey guys thanks for clearing this up for me. I forgot to mention I'm running an aftermarket starter. It for sure only has 3 terminals. My mistake was was trying to set it up as OEM. I will delete the line to the starter and move on.
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Re: Question on starter wiring
while on the subject im trying to wire up my starter as well, its only been 3 mon since i took all the wires out of the truck but cant remember how it was wired up i am re ally lost now. i am running an hei dist, the starter has three terminals one large top center and two smaller on each side, the large terminal is for the pos+ cable from the battery correct? the solid purple wire from the firewall bulkhead is from the ignition correct?,and goes to one of the smaller terminals? also the neg main cable from the battery does it ground to the frame its to large of a connector to go on the starter?, there is a smaller wire with a connector coming off the neg cable ill asume it goes to the other small terminal on the starter correct or am i totally f#$%ed up on this? i should have taken pictures, the bad part is i wired the thing up but have never left it apart for months on end, please help!!!
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Re: Question on starter wiring
Batt positive to big post on starter.
Purple from ignition switch to "S" terminal on starter (closest to engine) Batt negative to engine block. Thats it since you have HEI nothing is wired to the starters "R" terminal. |
Re: Question on starter wiring
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Re: Question on starter wiring
thanks guys after hearing it from you all images started poping in my head as to where everything was, like the small wire from the neg. i remember know it was connected to the fender right beside the factory dist. block, duhhh...
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Re: Question on starter wiring
Can I pile on?? My wife's '69 C-10 also had a butchered engine wiring harness. She has a 350, HEI with air. I ordered the correct OEM style harness for the custom HEI set-up but several of the wires are still a mystery to me. Does anyone have a wiring diagram for a '69 HEI small block with air???
I'll post pick is that will help............ Thanks...Rick |
Re: Question on starter wiring
have you looked at the one posted in the sticky thread?
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Re: Question on starter wiring
Yup..............it's not for HEI..............I'll shoot some pics tonight,,,,,,,,,
Rick |
Re: Question on starter wiring
How about this one? I was having issues with my battery only providing about 10 seconds of cranking time, so I replaced it. Now every so often when I'm cranking the engine, the starter engages the flywheel, but does not turn the engine over unless I let go of the key and try it again. Then it will turn over, but the turn signal indicators on the gauge panel light up very dim. What could this be? Wiring/electrical is not my forte at all. Any help would be appreciated.
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Re: Question on starter wiring
OK, while I'm installing the 2nd battry, I'm trying to fix the "sometimes just click" while trying to start. I dropped the starter and have installed a new solenoid. The old wires aren't stellar so I'm going to replace them. The purple and the yellow. My question is what gauge should I run?
I bought 14 ga Purple and 10 ga yellow. Is the 14 big enough. I ran 2 ga from the battery to the solenoid on both batteries. I ordered the heat reflective tape to protect them from the heat. Thanks in advance! |
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Re: Question on starter wiring
OK back to NAPA for bigger purple wire and smaller yellow.
The "click noise" happens when the engine is cold or hot. And it doesn't do it all the time. The engine has always started, just can be annoying with 3 or 4 turns of the key before it starts. |
Re: Question on starter wiring
check the brushes in the starter. If the solenoid is worn out, the brushes probably are too.
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Re: Question on starter wiring
I replaced the positive cable when I replaced the battery, but I have not replaced the ground cable since I've owned the truck, over 9 years. I will take a look at it. Thanks for the reply.
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Re: Question on starter wiring
Ok this is what i got, the purple and yellow wire go's to the starter and the other 3 wires go to the distributor, lol if im correct. Iv looked at the diagrams lol i really don't know how to read it.
http://67-72chevytrucks.com/gallery/...69/wiring6.jpg http://67-72chevytrucks.com/gallery/...69/wiring5.jpg http://67-72chevytrucks.com/gallery/...69/wiring4.jpg |
Re: Question on starter wiring
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I might be able to help more if you tell me what color the other two wires are, what year truck you have, and what engine it originally came with. Ray |
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Re: Question on starter wiring
Sorry, I was thinking about stock ignition, not HEI.
So first off, please disregard what I said about the yellow wire. It is normally used to bypass the resistance wire in the stock harness when cranking, and you shouldnt be using the resistance wire with HEI. The green wire probably goes to the temperature gauge sender, assuming it is still connected to the gauge at its other end. By process of elimination, the white wire might be the power lead for the HEI. There is no white wire in the stock engine harness. http://www.dartez.com/images/70/diagram2.GIF The best suggestion I can give at this point would be to talk to whoever wired up your HEI the first time. Ray |
Re: Question on starter wiring
ok thanks, I have a friend who has a truck like mine with a 350 i called him, so im going to check out how he has his set up lol i forgot about him and his truck, but thanks for your help i think your right
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Re: Question on starter wiring
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thanks |
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