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peterpete190, Auto Technician
Category: Mazda
Satisfied Customers: 27813
Experience:  Auto repair Technician with 17 years experience.Past ASE and other certifications.
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I just did an engine swap on my 2010 mazda 3 1.6l. I

Customer Question

I just did an engine swap on my 2010 mazda 3 1.6l. I Installed a 2.5l engine on my mazda 3 everything bolted up fine the problem im having is with the harness. I left my old fuse box on and plugged in the 2.5l engine harness into the fuse box. my 1.6l didnt have a TCM but the 2.5l have one on my old fuse box there is a slot for the TCM but it is a blank no wiring how do i solve this?
Submitted: 1 year ago.
Category: Mazda
Expert:  peterpete190 replied 1 year ago.

My name is ***** ***** I am a professional here at Just Answer. I noticed that your question had not received a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.

Normally you would have to run wiring into the fuse panel with the terminals needed (usually purchased from a dealer and in some cases a local parts store) and then run the wiring to the components that need fused power.Then install the fuse(s) needed as well.

If more help is needed, use the reply tab to continue our conversation. If no further assistance is needed, kindly rate my service.You can rate at any time and we can continue to work on your question as this will not close out your question.Keep in mind in some cases it can be difficult to fully diagnose or help repair your vehicle without seeing it and I work on delivering the best possible answer from what I see to work with.

Thanks Pete

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