Testing the Volvo's wiring harness || CONNECTED outside of the car

in this video I'm testing the Volvo's wiring harness connected outside of the car on the garage floor with power. I will also explain how its laid out and what wires go where on the harness. This harness will be modified to fit my needs on the Volvo 740 t5 engine swap project. This testing is also to check for faults in the harness not caused by me.

I'm not an expert on the Jetronic EMU in any way, so please check the comment section for updates before trying anything yourself.
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Disclaimer:

Due to factors beyond the control of BackmansGarage, I cannot guarantee against improper use or unauthorized modifications of this information. BackmansGarage assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. BackmansGarage recommends safe practices when working on vehicles and or with tools seen or implied in this video. Due to factors beyond the control of BackmansGarage, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not BackmansGarage.

[donovanlucibello]

Not only was it interesting and fascinating, it is a gift to all of us who cannot speak Swedish to have you express all of this so clearly in English. All of your hard work does not go unnoticed, thank you!

[michaelrichardson]

Big thanks sir for taking the time to make and fully explain everything along the path of the wiring harness...This was more than just interesting, its a one-of-a-kind classic...

[gchordguitar]

Incredibly helpful to see it sprawled out like this. Thanks for taking the time.

[J.Plbrg.]

I just discovered your channel this morning and i have watched every car related video on your channel. You are super awesome guy! I myself have volvo 945 D24 N/A 1993, have been working on that recently, it has electrical problem somewhere. Tachometer does not work, speedometer sometimes jumps to random numbers, instrument cluster lights sometimes work and sometimes not, i cleand some of the grounds that i was able to find but the problem is still there :D Looking forwards to new video, Keep up the good work, and cheers from estonia!

[MickeyMishra]

As a Low Voltage electrician, and a guy whose absolutely fanatical about wiring ; this video is like watching spicy content but with copper wire and relays. It was such a joy to see this out in the open so to speak and watch the whole thing work like Kinetic art.

I am actually quite surprised that I have not seen this in any art installations or some of those lighted LED paintings like they do with paintings of Cities or Bridges where they use Fiber optics and a color wheel.

This would make an excellent teaching tool to show kids how these systems work, & give them a strong appreciation of the not only how the flow chart diagrams look like in real life. But also how the different wire gauges work with voltage drop along the Direct Current Path & length of the electrical wires.

I also wonder if there ever has been a layout like this done with a CanBus System? That's a lot closer to network cabling using the automotive FireWire or 1394-b automotive implementation of the protocol.

I really appreciate how this was laid in a way that physically mimics the real world orientation of the cars electrical system.

If Manufactures did this as well, electrical issues inside cars would end up being a whole host easier to diagnose once you see the physical layout and placement of these wires in a car.

BRAVO Mr. Backman!
Amazing job dude!

[storthor]

Love the video! Do a more indepth video of what you remove when deleating the engine harness, will be alot of help for everyone that is engine swapping!

Greatings from Hudiksvall and keep up the good work! 🙂

[SimpsonsClassics]

Great video. Wiring scares me lol but I understand it more now.

[EnriqueLopez-hbjn]

Awesome tutorial on the wiring harness👍👆☝️👏🏼🤞☝️👆👍👏🏼

[TTURBOVOLVO]

You're a madman haha, We really appreciate this.

[snkombo]

Bra förklarat, nyss fått in all min el igen efter jag dragit det i skärmarna, var lite smådeygt men fick o bilen startade också 😁

[NewGunzSociety]

You seem to be very knowledgeable. Have a Fb maybe we could chat about my next project? Basically need to simplify the engine harness/ecu harness so i can eliminate all fuse box wiring/dash wiring/unneeded wiring for derby use.

[jdcabauwnl]

I didn't watch anything yet, but I am already liking this! I ll send a reply👍🏻

[juhanikorja]

Connector for air compressor? That black mystery connector. My -89 740 has air compressor on left side, right on that position.

[dimitrijacobs]

@Backman what did you use for the ground wires? I'm gonna refresh my loom and test it first..
Greets

[anama]

great walkthrough. no SRS system? I'd like to see that someday

[henrikjonsson]

Bra video. Har du några bra tips på när bilen stått ett tag man inte vet exakt om elen fungerar. Ska man koppla på batteriet snabbt och se om det kommer några små gnistor från polerna som kanske antyder på antingen att något är på eller att det är någon kortslutning. Jag har rensat en del kablar som inte var där från början.. Om det fungerar kan man kanske vrida om nyckeln snabbt ett par ggr. Annars om man levererar 12v för länge med fel kan det sluta illa kanske. Också ganska vanligt att någon har byggt om elen på sitt sätt :).

[troyward]

Is there a resource around that will tells me the length of the wires in the different sections? I would like to build all new wiring harnesses/cables for a 91 240 sedan.

[josesomoza]

Hola amigo tengo un volvo 940 motor 2.3L modelo B230F y tiene falla de que cascabelea o pistonea muy fuerte cuando aplico la palanca de cambios a D o a la posición R y queda en marcha lenta suena golpeteo pistones que puede ser este fallo. Ya reemplace bomba gasolina filtros todos bujias cables e inclusive se le cambio nueva la correa de distribución y hace igual fallo. Me puedes ayudar gracias

[JakeSullyAT]

Very nice Video, if i will have some trouble with my 740 i alway can backup on your video ;))

[theworldwelivein]

I have Volvo V70 2004, Passenger headlight is unplugged. How do I plug back in?