Custom Wiring Harness: Where To Start? [#UPDATE 306]

Where do you start a large, daunting wiring project? With planning of course, but what should that entail?
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🙋‍♂️ Take $25 USD off ANY HPA course with coupon code: YOUTUBE25
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In this 'Today at HPA' update we take a look at how the wiring requirements were broken down for the FJ40/BF42 V8 engine conversion project. This includes making sure you know the inputs and outputs you require in order to understand what ECU is best for you and your requirements. So, so SO many people ask us 'what is the best ECU' and this explanation helps to show that there is no such single, simple answer as what YOU need, what WE need here and what your neighbour who still hasn't returned your Oscilloscope after 4 weeks needs for entirely different projects and budgets.

Andre shows how he has listed everything out and also broken it down so he knows exactly what he needs, the drive by wire (dbw) throttle body system for example not being one item on the list, but 6 in order to cover the half bridges, position sensor and analog voltage inputs to make sure we know everything's position as well as the ability to position it.

Also discussed are connector and current sharing considerations where you need to check the pinouts and make sure that you are allowing for the correct size wire as well as not overloading your connector terminals where applicable.

We touch on the electric handbrake and wiper motor in relation to bench testing, noting the handbrake sourced from an Audi wasn't as straight forward an option as we could have gone with, but it was also nice to deal with something a little different.

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TIME STAMPS:
0:00 - Introduction to members Webinar '306 | Basic Wiring Fault Finding'
0:56 - Racetech Competition is now CLOSED. Congrats To The Winner!
2:16 - FJ40 Project Update - 3UZ Swapped BJ42
3:15 - Complete Rewire Underway
4:48 - Wiring Planning: What Do You NEED?
5:40 - Outputs And Inputs | ECU Selection
6:50 - Initial Planning Checklist
7:10 - DBW Throttle Wiring Plan Explanation
7:50 - Engine Speed and Position + VVTi
8:55 - Other General Sensors
9:15 - Power Steering and A/C
9:21 - Pass Through Wiring
9:50 - Totals For ECU Selection Considerations
10:37 - ECU Pinouts & Current Sharing
11:25 - Autosport Connector Reference
13:09 - Wiring Sizing | Limited By Contacts
14:00 - Power Distribution Module Bench Testing
15:00 - Audi Electric Handbrake Setup
18:41 - Almost Went In 'To Hard Basket'
19:01 - Wiper Motor Setup and Test
20:50 - PDM Installation and Configuration Course
23:37 - Tuned In Podcast: Dahtone Racing | GTR & RB Wizardry
25:25 - Do You Like Free Stuff?
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WEBINAR INFO: This [UPDATE] came right before members only webinar '306 | Basic Wiring Fault Finding' which can be found via Gold Membership on the HPA website.

Wiring faults are the most common issue we see when we have a car on the dyno. Fortunately most of the normal faults we come across are relatively common and easy to diagnose. In this webinar we’ll look at some basic diagnostic techniques that you can perform with simple tools.

Want to watch members-only High Performance Academy lessons on topics like the one mentioned at the start of this [UPDATE]? Sign up via the website, link above with coupon code.
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#highperformanceacademy #learntotune #enginebuilding101 #dontletthesmokeout #wiring101 #dieseltuning #datanerd #gofasterwithdata #racecraft #learndriveoptimise #motorsports

[ldadol]

Looking forward to the FJ cruiser content! Perfect timing as I’m doing a similar electrical overhaul with a Nexus r5 on my rx7

[anthonyhousein]

what a massive video. making devices communicate with each other that was never intended to do so and finding logical and efficient hacks to achieve the overall goal. just wow.

[shaunmaro]

@11:40 you have all of the injectors there EXCEPT #5, I didnt see it listed anywhere else but I mightve overlooked it

EDIT: overall great video! very informative

[lawrenceclaridge]

I’ve been building looms for a couple years now, from MIL spec to club level. I want to buy a project car to do something for myself, will ofcourse be going full auto sport and raychem spec. ECUmaster everything (because I work for them and products are amazing). Loving the tuning course too. Wiring is not as scary as it seems, I hope people get into it more! Someone recommend a good project car that I can show off my skills on. Was possibly thinking E36, any ideas?

[lyanbv]

Oh can the regular cabin controls be connected to a pdm? e.g. steering sticks, aircon sliders, aircon venting, defogger, etc etc?

[landc]

Not a huge fan of uz series engines in fj40s. They are a good series of engine, but they take so much engine bay space. Also isn't the starter in the valley? Fj40 owners sometimes take they're fj40 pretty far from civilization. So ease of repairability and accessibility to components is a a concern. Not that I would totally not consider a uz series engine for those reasons, but something that would make me think twice.

[shaneplohl]

Maybe I missed it, but how come you didn't use a half bridge output from the ECU for the handbrake? Purely the current requirements?

[bobbysuncin]

Invest in some proper pin extractors. Plastic extractor do break so get extras and just take ur time with all them

[kennygaines]

would 22 gauge tefzel wire be sufficient for 02 sensors

[salloroc]

Could you not just put a diode inline for your wiper motor low speed output to prevent backfeeding to the PDM? Seems like a lot simpler than anything else.

[rmworldnews]

How can a someone get or pay for a course?