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06-13-2014, 01:20 AM
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#1 |
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Registered User
Join Date: Nov 2012
Location: Post Falls, Idaho
Posts: 1,757
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wiring......for dummies....
OK, so Henry (1949 3600) needs some new wiring!!
I am using part of the original harness and fuse block. Installing a SBC with an HEI. Found this diagram online and it makes sense. Any input? 
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06-13-2014, 06:53 AM
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#2 |
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Elev8r Man
Join Date: Aug 2010
Location: Glendora, CA
Posts: 835
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Re: wiring......for dummies....
Just make sure that you have power all the time on the ignition post even when the key is trying to start. If not it will be hard to start.
__________________
1955.2 C4 Carry-all / Suburban  ---> 55.2 Build Thread!!1958 Fleetside SWB ---> 58 Fleetside Build thread 1939 2 door sedan My F.B. project page. |
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06-13-2014, 08:20 AM
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#3 | |
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Registered User
Join Date: Mar 2012
Location: Lakes Region NH
Posts: 3,200
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Re: wiring......for dummies....
Quote:
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06-13-2014, 09:39 AM
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#4 |
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Registered User
Join Date: Jun 2014
Location: Richmond Virginia
Posts: 8
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Re: wiring......for dummies....
Is that 15A fuse necessary for HEI ignition. I'm using HEI on my 58 gmc with sbc now but I don't have a fuse in line. I'm also using a one wire set up on an alternator. Larry
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06-13-2014, 11:54 AM
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#5 |
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Registered User
Join Date: Jun 2006
Location: Idaho
Posts: 8,800
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Re: wiring......for dummies....
Make sure the battery to switch wire has a fusible link or fuse.
__________________
1959 Chevy Short Fleetside w/ 74 4WD drive train (current project) OrrieG Build Thread 1964 Chevelle Malibu w/ 355-350TH (daily driver) Helpful AD and TF Manual Site Old Car Manual Project |
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06-13-2014, 12:57 PM
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#6 | |
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Registered User
Join Date: Feb 2010
Location: Lebanon, Ohio
Posts: 1,359
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Re: wiring......for dummies....
Quote:
 . All it takes is to have your battery connected, pull that wire off the distributor and let it touch the manifold.
__________________
Bob "It won't take long and it won't cost much." '55 3100 (383/700R4)--'55 Belair Sedan (350/4-speed)--'64 'Vette Conv. (327/4-speed)--'68 GTO Conv. (462/4-speed)--'69 Cutlass Conv. (350/TH350)--'06 'Vette Conv. (LS2/6-speed) Bob's Retirement Build - My 55 TF Bob's 700R4 Build (how-to) |
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06-13-2014, 11:16 PM
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#7 | |
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Registered User
Join Date: Feb 2010
Location: Lebanon, Ohio
Posts: 1,359
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Re: wiring......for dummies....
Quote:
__________________
Bob "It won't take long and it won't cost much." '55 3100 (383/700R4)--'55 Belair Sedan (350/4-speed)--'64 'Vette Conv. (327/4-speed)--'68 GTO Conv. (462/4-speed)--'69 Cutlass Conv. (350/TH350)--'06 'Vette Conv. (LS2/6-speed) Bob's Retirement Build - My 55 TF Bob's 700R4 Build (how-to) |
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06-15-2014, 03:55 PM
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#8 |
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Registered User
Join Date: Jan 2008
Location: Orting WA.
Posts: 16
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Re: wiring......for dummies....
Don't forget the fusible link or inline fuses. Once you let the smoke out of the wires, its real hard to get back it!
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06-13-2014, 11:52 AM
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#9 |
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Registered User
 
Join Date: Jul 2007
Location: Toppenish, WA
Posts: 15,708
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Re: wiring......for dummies....
I've never run a fuse to an Hei but don't see why it would hurt. 15 amps may be on the low side though.
Fabguy makes a good point. Some of the switches on these trucks don't send power to the IGN post when the truck is cranking as they rely on the resistor bypass wire to send power to the coil when cranking the engine. I can't remember what rig but I ran into one that would fire when you let off the key and it was on ign if everything was right and we had to hook up the bypass wire to get it to work. If you have 12V + to the distributor when cranking the engine with the starter no problem.
__________________
Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around. |
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06-13-2014, 06:03 PM
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#10 |
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Registered User
Join Date: Jun 2014
Location: Richmond Virginia
Posts: 8
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Re: wiring......for dummies....
My 58 has 12V on the ignition as soon as you turn the switch on. Coach529's 49 may not be that way. When I wired my HEI I used the resistor lead which came off the ignition position of the switch. I removed all the resistor wire and went direct to the switch. I want to put a fuse on it but maybe from the one wire alternator back to where it connect to the system. If you think 15A is a little small how big do you think it should be.
Coach529, are you using an alternator or generator.Larry |
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06-13-2014, 08:15 PM
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#11 | |
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Registered User
Join Date: Nov 2012
Location: Post Falls, Idaho
Posts: 1,757
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Re: wiring......for dummies....
Quote:
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06-13-2014, 08:12 PM
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#12 |
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Registered User
Join Date: Nov 2012
Location: Post Falls, Idaho
Posts: 1,757
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Re: wiring......for dummies....
Thanks for all the info guys. I twist wires everyday, but this vehicle stuff has me confused.
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