JDM Bullsh*t

[veedubin]

So yea 2 ish years ago, my supra was removed from service following a pretty nasty engine problem. So a few weeks ago, I picked up a JDM motor, harness, ecu and am slowly getting things dropped in and put together. I'm trying to find all the parts that I had removed from the car as it sat in my driveway for this long. I'm still missing a few yet. But my main issue is that the old harness i had from the US motor, was a bit hacked up for my taste. So I'm left using the JDM harness (very very good shape) I'm not sure If I am a dumbass or if it is, but the harness is too damn short!!!! Before I go and extend a shit load of wires tomorrow morning, am I a dumbass or do I have a lot of wires to splice?

 

[Fletch124]

You have lots of wires to extend yes. Lots of soldering ahead of you. Ohh and be very careful of extending the knock sensor wires. They are shielded(signal wire wrapped in other wire that is grounded).

 

[Davismj711]

Keep in mind your dealing with a harness intended for a right hand drive Supra, so yes it is shorter. Do a search i know I have seen threads dealing with this ^^

Good Luck getting her goiin again ^^

 

[gofastgeorge]

I recommend using heat shrink tubing on the slices.
I do a 2 layer hear shrink, the second one longer than the first.
I slide one up one wire, and the other up the other wire.
Once the wires are soldered together, I do the shorter heat shrink, and then slide the longer one over top, and shrink it.
Many electronic suppliers sell the stuff in 3 foot lengths.

 

[karlmk3]

I recommend using heat shrink tubing on the slices.
I do a 2 layer hear shrink, the second one longer than the first.
I slide one up one wire, and the other up the other wire.
Once the wires are soldered together, I do the shorter heat shrink, and then slide the longer one over top, and shrink it.
Many electronic suppliers sell the stuff in 3 foot lengths.

ok it dosent have to be extended you can drill a hole by the throttle cable and run it there thats what i did i didnt have to extend the wires this is a good way if you cant or dont want to extend the harness

 

[veedubin]

ok it dosent have to be extended you can drill a hole by the throttle cable and run it there thats what i did i didnt have to extend the wires this is a good way if you cant or dont want to extend the harness

That thought has crossed my mind a few times over the last few days.... I'm just not into cutting any more holes into the body of my car though. As far as soldering, I'm very competent with that so no biggie with that. And knock sensor wires, I have the rewire setup I made for the last engine still in tact, so I'll be using that. I just cut up my old nasty harness this morning, so That I can use those wires to extend the new harness. I like colors to match and makes life easier I think. Now I am noticing a few larger wires in the harness. Mainly the grey insulated groupings of wires. Are they a sheilded wire as well?
At any rate, I need to go out and buy more heatshrink, I ran out and didn't realize till this morning. For the double heatshrink, there is a better way and more weather proof way to do that. THere is heatshrink available that is lined with hot glue type material. It works amazing, and is very abrasion and weather resistant. It is a bit more expensive, but not much more if you add up all the peices of regular heatshrink needed to complete a job.

 

[akito]

I would rather fix up the harness you already have. How bad it is?

 

[veedubin]

I would rather fix up the harness you already have. How bad it is?

Previous owner had MAFT pro installed, then took it out, then had AFC, then somehow, 1/2 the connectors on the engine side got broken. It's pretty bad. I've started using it as parts for now.

 

[TorqIsKing]

No offense intended, being a forum noob, but....

After way too much experience slicing engine harnesses, as well as lots of other wiring, I'd never solder a slice. Its simply too brittle IME/O. I prefer using good quality crimp splices with all weather heat shrink, the kind with sealant, for engine compartment splices.

I use radio shack uninsulated crimp connectors and real crimping pliers as opposed to the cheap auto store junk. The heatshrink I get from local diesel mechanic, he uses it for external wiring on big trucks.

 

[PureDrifter]

No offense intended, being a forum noob, but....

After way too much experience slicing engine harnesses, as well as lots of other wiring, I'd never solder a slice. Its simply too brittle IME/O. I prefer using good quality crimp splices with all weather heat shrink, the kind with sealant, for engine compartment splices.

I use radio shack uninsulated crimp connectors and real crimping pliers as opposed to the cheap auto store junk. The heatshrink I get from local diesel mechanic, he uses it for external wiring on big trucks.

so solder joints are going to be less secure than a crimp splices? :aigo:

uhh no:nono:

 

[Flateric]

I also thought that soildered connections would always be superior but apparently this is not always the case.

They do offer less resistance and when shrink tubed are more water resistant.

However apparently in a high vibration situation like in alot of area of the engine compartment crimped connections are supposed to be superior in the long term. They offer less chance of failure from wire fatige.

I personally have had more issues with poorly crimped wires failing, but apparently in the automotive industry crimped wiring is choosen for these reasons. Not for cost reasons as I personally had previously thought.