In need of wiring diagram

G

gshodis74scout

New member
Can anyone point me in the right direction? I’m looking to purchase a wiring diagram for a 74 scout . My scout is getting no spark , nothing to the coil , even when I run a direct line to coil from battery , it’s driving me crazy
 
Best $100 purchase I made was the Service Manual for Scout IIs from IHPA. It has ALL of the wiring diagrams you’ll ever need in great detail. Helped me track down and troubleshoot my starting/ignition problems along with great help from admins/experts on this site.
No juice even when going direct from battery to coil? Hmm, odd. People smarter than me here can likely help you get it sorted.
 
I know it’s like there is nothing coming from the ignition to coil , I changed coil , cleaned points , changed points , condenser , etc . It cranks over fine but absolutely no spark
 
If you click on the following link, it will take you to a stickied thread that has some pdf scans of electrical schematics. This isn't to dissuade you from getting your own hard copy of the FSM, but in the meantime maybe this can be of help.

IHC Electrical Schematic Library

Individual requests for assistance with various electrical schematics and specifications has become a real management problem around here! So going forward, this stuck thread will serve as our library for information pertaining to schematics, electrical specification spreadsheets...
forums.ihpartsamerica.com
Now is this a case of it was starting and running fine the last time you tried and then all of a sudden it wouldn't start the next time you tried, with nothing having been changed under the hood in between, or had some work been performed since the last time it ran, or this this rig brand new to you and you've never had it running?
 
Ok. So a '74 with points dizz received switched power to the coil via a resistor wire which steps the voltage down slightly to protect the points and the coil while the engine is running. This wire in unmodified form looks different from the rest of your electrical wires, primarily in that it was encased in a special cloth like sheath for the length of the wire. The other notable thing about this wire is the length itself, being 72 inches. That length is how the wire could achieve a resistance value of @ 1.8 ohms. That length is far longer than needed to run from the firewall bulkhead connector to the coil positive terminal, so what IH did was just fold the excess length to and fro and tape it all up in a not so elegant folded mess and then wrapped it in electrical tape. What often happens down through the years is that extra long odd ball wire length gets "optimized" by well meaning, but ignorant former owners, or it gets replaced altogether with a length of standard automotve wire, which isn't suitable for the purpose. So a good place to beign is with the small gauge wires that are connected to your coil POS and NEG terminals. How many are there? What do they look like? Where do they go? and What condition are they and their terminals in? Good pictures are always helpful.
 
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