1983 F-250 XLT, 5.8L. Where can I get a under hood wiring diagram?

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Partial wiring diagrams are usually available, but if you want a full wiring schematic, you need a workshop manual or a subscription to a website.

https://www.justanswer.com/chevy/2iqt1-color-code-ignition-module-1988-chev-s10.html

https://www.google.com/search?q=1987+Chevy+S10+2.8+spark+module+color+code+wiring+diagram

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There is no such thing as an underhood wiring diagram. Wiring diagrams are grouped by SYSTEM, not location. So you'd have to get separate wiring diagrams for the charging, fuel injectors, sensors, lights, etc. Even then it's difficult to get the exact diagram. Read this post on what's involvled.

http://ricksfreeautorepairadvice.com/get-car-wiring-diagram/

If you haven't removed the wires yet don't. The best way to replace ignition wires is to remove ONE at a time and replace with a new one before moving on to the next. That way you won't get the firing order mixed up. Hope this helps

On 1995 Ford Truck Bronco 5.8L EFI 8cyl the Control Module-Ignition is located under hood, center, upper engine area, front of intake manifold, mounted on front side of distributor.



Fig. 1: A TFI-IV ignition module

Hope this helps (remember to rate and comment this free answer).

Ignition module sits in the ignition distributor, remove distributor cap, there will be two elec. harness plugs, the one with two wire's is for the pick up coil, the other one is for the ignition module, just unscrew module out of distributor and install new one.

Confirm, HeI ignition? Check distributor ror for center burn out under the center spring contact.Replace the cap and rotor.

Do you mean plug wires? there is a diagram on the front of your truck near the radiator that tells your fireing order you read it counter clock wise and your spark plug numbers is from front looking to the back left side #1 #2 #3and #4 right side is #5 #6 #7 And #8 is your motor a 5.0 v-8?

you need to check the fuses again under the hood and under the dash if all are good look for a bad fuse link if you melted wires you had to blow fuses or fuse link

The Bronco did come with the 5.8L. It's a 351 Windsor though. Ford quit making the Cleveland engine back in '74. You should have a vacuum diagram under the hood of your truck.