wiring diagram help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

enick72 · 08-20-2010, 03:46 PM

Does anyone have a wiring diagram for starting/ignition system for a 65 with 320 6 cyl? My truck died the other day and after walking home and getting a ride back to get it about 3 hours later it fired right up, of course. I went to start it yesterday and nothing, fuel no fire. I only had 4-5 volts at the coil and shouldn't there be 12v with key on? I hooked a jumper wire from the battery to the pos side of the coil and it started with no problem. I need to see where the feed comes from (I think the starter solinoid but not 100 % sure)

Born Lucky · 08-20-2010, 03:52 PM

If you run a search you will find!
If you do not come up with anything e-mail me and I will send info.

**aerotruk63** · 08-20-2010, 03:55 PM

There's a resistor wire that comes up from the starter that should reduce the voltage down to 9 volts at the coil, if I remember correctly. I had that wire split on me at one time also corroded connector at the starter. Try not to cut the wire any shorter because that will change the voltage.

raycow · 08-20-2010, 05:31 PM

The wire from the solenoid to the coil (usually yellow, but other colors are possible) is just ordinary wire. This one bypasses the resistance wire in the harness, but only when the starter is cranking the engine. The actual resistance wire runs from the firewall connector to the junction pont with the yellow wire, which is normally either at the solenoid (R) terminal or the coil (+) terminal.

4-5 volts at the coil (and this is measured with the points closed - you will see 12 volts with the points open) does seem a bit low, but it still shouldn't keep the engine from starting. Remember, the coil SHOULD get almost a full 12 volts when the starter is in operation. You might want to check the voltage at the coil while a helper cranks the engine, just to be sure.

Ray

enick72 · 08-20-2010, 05:41 PM

I changed my search title a little (like google one word or an arrangement of words make all the difference) a little and found a wiring diagram. I'm going to keep the volt meter in the truck with a couple jumper wires and a few assorted tools to see if it will happen again. Like always, hard to find a problem when it is not acting up.

**aerotruk63** · 08-20-2010, 06:07 PM

Sorry to have misled you, going on memory! Thank's raycow.
1963 Shop Manual American
R terminal 20-W/OR to ignition switch through the firewall & DG to the coil
B terminal 6-B to battery
S terminal 16-V through firewall to ignition switch,

markeb01 · 08-20-2010, 09:30 PM

This should be the diagram you were asking for:

http://webhosting.web.com/imagelib/s...309&title=1965 6 Cyl. Engine Compartment w/ Gauges

The next link is the home page in case you want to look for more:

http://www.64moneypit.pages.qpg.com/...ucks/id64.html

08-20-2010, 03:46 PM	#1
enick72 Registered User Join Date: Jul 2010 Location: Marietta, GA Posts: 202	wiring diagram help Does anyone have a wiring diagram for starting/ignition system for a 65 with 320 6 cyl? My truck died the other day and after walking home and getting a ride back to get it about 3 hours later it fired right up, of course. I went to start it yesterday and nothing, fuel no fire. I only had 4-5 volts at the coil and shouldn't there be 12v with key on? I hooked a jumper wire from the battery to the pos side of the coil and it started with no problem. I need to see where the feed comes from (I think the starter solinoid but not 100 % sure) __________________ 55 Chevy 1st series 65 Chevy stepside short bed www.bigslikpokertables.com

08-20-2010, 03:52 PM	#2
Born Lucky Registered User Join Date: Mar 2010 Location: St Charles MO Posts: 481	Re: wiring diagram help If you run a search you will find! If you do not come up with anything e-mail me and I will send info.

08-20-2010, 03:55 PM	#3
aerotruk63 Check The Champ, Demonstrator Join Date: Jun 2009 Location: Montreal,Quebec Posts: 6,627	Re: wiring diagram help There's a resistor wire that comes up from the starter that should reduce the voltage down to 9 volts at the coil, if I remember correctly. I had that wire split on me at one time also corroded connector at the starter. Try not to cut the wire any shorter because that will change the voltage. __________________ 1963 *Chevrolet Truck* Literature LINK: https://picasaweb.google.com/113840717762774560215 YouTube Channel with 20+ Original *Chevrolet Truck* Salesmen, Mechanics & Service Department Training Slideshows. https://www.youtube.com/results?sear...otruk63&page=1 Last edited by aerotruk63; 08-20-2010 at 03:56 PM.

08-20-2010, 05:31 PM	#4
raycow Registered User Join Date: Mar 2003 Location: San Francisco, CA USA Posts: 2,454	Re: wiring diagram help The wire from the solenoid to the coil (usually yellow, but other colors are possible) is just ordinary wire. This one bypasses the resistance wire in the harness, but only when the starter is cranking the engine. The actual resistance wire runs from the firewall connector to the junction pont with the yellow wire, which is normally either at the solenoid (R) terminal or the coil (+) terminal. 4-5 volts at the coil (and this is measured with the points closed - you will see 12 volts with the points open) does seem a bit low, but it still shouldn't keep the engine from starting. Remember, the coil SHOULD get almost a full 12 volts when the starter is in operation. You might want to check the voltage at the coil while a helper cranks the engine, just to be sure. Ray Last edited by raycow; 08-20-2010 at 05:40 PM.

08-20-2010, 05:41 PM	#5
enick72 Registered User Join Date: Jul 2010 Location: Marietta, GA Posts: 202	Re: wiring diagram help I changed my search title a little (like google one word or an arrangement of words make all the difference) a little and found a wiring diagram. I'm going to keep the volt meter in the truck with a couple jumper wires and a few assorted tools to see if it will happen again. Like always, hard to find a problem when it is not acting up. __________________ 55 Chevy 1st series 65 Chevy stepside short bed www.bigslikpokertables.com

08-20-2010, 06:07 PM	#6
aerotruk63 Check The Champ, Demonstrator Join Date: Jun 2009 Location: Montreal,Quebec Posts: 6,627	Re: wiring diagram help Sorry to have misled you, going on memory! Thank's raycow. 1963 Shop Manual American R terminal 20-W/OR to ignition switch through the firewall & DG to the coil B terminal 6-B to battery S terminal 16-V through firewall to ignition switch, __________________ 1963 *Chevrolet Truck* Literature LINK: https://picasaweb.google.com/113840717762774560215 YouTube Channel with 20+ Original *Chevrolet Truck* Salesmen, Mechanics & Service Department Training Slideshows. https://www.youtube.com/results?sear...otruk63&page=1 Last edited by aerotruk63; 08-20-2010 at 06:07 PM.

08-20-2010, 09:30 PM	#7
markeb01 Senior Enthusiast Join Date: Feb 2007 Location: Spokane Valley, WA Posts: 8,356	Re: wiring diagram help This should be the diagram you were asking for: http://webhosting.web.com/imagelib/s...309&title=1965 6 Cyl. Engine Compartment w/ Gauges The next link is the home page in case you want to look for more: http://www.64moneypit.pages.qpg.com/...ucks/id64.html



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