How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Ron Your Own Question
Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 23821
Experience:  23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
Type Your Ford Question Here...
Ron is online now
A new question is answered every 9 seconds

I'm installing a foxbody mustang engine harness on my 86

Customer Question

I'm installing a foxbody mustang engine harness on my 86 bronco
JA: How many miles are on the car? Is it an automatic or a manual transmission?
Customer: I think I have it all connected correctly but I'm getting no spark
JA: What year is your Mustang?
Customer: 91 mustanf engine harness 86 bronco
JA: Are you fixing your Mustang yourself? What have you tried so far?
Customer: I don't have a mustang, I have a bronco. I have converted it to mass air and am installing an engine harness from a 91 mustang.
JA: Anything else you want the mechanic to know before I connect you?
Customer: I dontknow anything about mustangs so I'm not sure what I need to know about putting on this mustang engine harness
Submitted: 7 months ago.
Category: Ford
Customer: replied 7 months ago.
Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call. Let me know if you need more information, or send me the service offer(s) so we can proceed.
Expert:  Jeremy replied 7 months ago.

My name is ***** ***** I will assist you with your question today.

I'm an independent contractor and I don't get paid until a rating has been made.

We can go back and forth as needed to help resolve the issue you are having. Follow ups are free after ratings, so rate in confidence!

What engine for the 91 did you use to replace what engine in the Bronco? Do you have the diagrams of each to match the harnesses up to where they needed to be?


You want a 5 star service and I want to provide a 5 star service. Please consider that I don't know your skill level as well as I can't see, touch, smell, hear the vehicle/machine in question. Please provide as much detail as possible and I will provide as much back.

Once an answer is provided, you should see a rating screen. Please rate my personal service to you. The ratings are my personal feedback, they are not the site feedback.

Thank you for allowing me to assist you through Just Answer!


Customer: replied 7 months ago.
Jeremy. Thanks for working with me. I am converting my bronco which has a 302 EFI. I have rebuilt the engine and removed all of the EGR systems. I installed a cam and have added a mass air sensor. Since the bronco was originally speed density I have a pcm from that they make for the trucks. I think I'm going to just start from scratch with an engine harness and make a new one. No one sells a bronco engine harness so people use a fox body harness since it has the mass air connection. I really need to know what I absolutely must have to get it running. I've ordered new relays and connectors from rock auto. What do I have to have? What's optional? Do I need to re-pin anything with this pcm I ordered?
I'm an amateur mechanic but at this point I know more about mid 80s broncos than the average bear.
Expert:  Jeremy replied 7 months ago.

I see what you're trying to do. you need the help from a classic vehicle or restore expert. I'm not the right expert for this. i will message other experts that do this in their day to day shops for them to assist you better.