Full Car Rewiring

[Simon-S14]

Wasnt sure where to put this... this section seems to be full of the smartest blokes and highest traffic. Ime about to embark on what i know will be the more time consuming painful job you can do to a car... wiring it from scratch.

who here has done it and can give me some tips.

Do i use any of the factory nissan loom/fuse box or do i just start from scratch?

[zebra]

Most of the guys doing race cars, buy the kits for hot rods etc.

Been told to stay away from the cheap ebay stuff.

But no personal experience sorry (went to start on the 33 but sold it before it was finished)

[RRob]

De-wired the factory loom in an S15. Still running nissan connectors, switch's and fuse boxes

[Simon-S14]

from those that i have spoken to... dewiring an existing loom seems to be the best way to go

[kitto]

Simon, what do you want left in the car once your done?

That is the best starting point, working out what you do and do not want.

[Simon-S14]

still want to retain the power windows and wipers...

[kitto]

Fag. Lol.

Hmm ok, wipers, yes i can understand. Electric windows adds weight uleh! But they never came with manual windows so your kinda stuck..

The wiring for power windows is a little complex as it usually routes all over the place to the necessary relays. Usually there's a thermal overload for them somewhere.

Have you ripped out things like all the cruise wiring, abs, radio wiring, speaker wiring, air con/climate control wiring etc.

[Simon-S14]

unless you can give me an alternative solution for windows im keeping them haha,.

yeah removing dash this weekened.. will just remove the whole body loom in one go i think and start from there...

[badhairdave]

from those that i have spoken to... dewiring an existing loom seems to be the best way to go

Dewiring is a pain in the arse! But it does have advantages.

I look at it like this:

If you are leaving everything in it's original location then yes, dewire.

If you want to retain factory switch gear then dewire.

If you want to relocate fuse boxes and have switches for everything then buy a kit.

If you want to relocate fuse boxes and retain factory switch gear you end up with something like the picture which has partial factory dash and switch wiring, modified engine loom to suit relocated fuse box, custom alternator, battery, starter, and lighting wiring. I also did custom power window wiring. It was a PITA.

[Single]

if your de wiring try this site, might help you with a tidy engine bay loom. and it has a lot of options.

http://www.chasebays.com/product/nissan-240sx/chase-bays-products/chase-bays-engine-harness--nissan-rb25det

as for the wipers, if you have ditched everything and kept wipers then you need the s14 loom for the full 6 wires(but thats easy to chop) you will either need new connectors or keep the old connector next to the computer. i would ditch the whole setup and run a switch and relay for them.

have a look at that site again, it might give you the wipers option?

[Simon-S14]

thanks for that man. the engine loom will be easy as i will be getting a haltech with a flying loom. so will be able to start from scratch with that one,

well i ripped everything out of mine.. so much wiring!!!! far out. Makes me think that de/wiring it will be more time wasted then good and i might just be better off running new wires and loom.

[sherman89]

I wired my car from scratch, wasn't overly hard, power windows where abit of a prick but I just used a 3 way momentary switch with 6 terminals on the bottom. You need to switch the ground/positive to go up/down.

Remember when wiring the alternator that you need a check light. Pm if you got an questions.

[urtwhistle]

All I can say in my limited experience. Is buy a pair of Deutch plug crimpers ( I think there are 3 different sizes so be careful). Now make a friend who is an autosparky for earth moving equipment and or truck trailers like I have. Get him to buy all the deutch plugs at about 1/5th the price that any normal person can buy them/ sells them. (a plug I was quoted $15 bucks for cost him about $3-4) make sure you get some good quality side cutters and good quality wire strippers, good quality heat shrink and a tube dielectric grease. (all the things your new mate can source for a fraction of the price you can) last step invite your mate around for a bbq on a Saturday and explain to him that your a little confused on how to use the crimpers correctly and that you need about 2 dozen examples b4 you will get it right.

Your car is now rewired lol

the 2 companys that my mate deals with are below.

http://www.connectsource.com.au/

http://www.genr8.net.au/

YOUR WELCOME

Chris

[STATUS]

this is what i use. Cheap and easy. Allows 20 circuits, just keep you connectors off lights etc and solder them to the loom, generally do an efi race car in a day.

[DCIEVE]

Do you have any more details Trent? That site is difficult to navigate.

[T04GTR]

you could get a racepac power distribution unit.

[Simon-S14]

can you pm me more info trent?

also whats the racepak unit? im getting one of their IQ3 dashes also

[STATUS]

can you pm me more info trent?

also whats the racepak unit? im getting one of their IQ3 dashes also

Simon i have pm turned off, email me [email protected] and i will forward on the details.

[femno]

I wired our 180 drift car from scratch. Its really easy if you know basic relay circuits. The ECU control is made up of a few relay circuits and thats it (were running PFC on the std ECU loom).

We thought about de-wiring but what a pain in the arse! There are sooo many things to get rid of, and if you cut one wrong thing youll be scratching your head for weeks because you wont understand the nissan loom. Youll spend as much time picking the tape off it as making a whole new loom.

I used the old 180 looms for the relays and relay plugs, and used the fuse box to hold the relays, hell, i even used the wire from it. All i bought was a 10 fuse holder from burson. The only paperwork I needed was the ECU pinout, and a ECU wiring diagram, for power, ECCS power circuit, tach and fuel pump run.

Well be running electric windows which are easily done as above, google a simple motor forward/reverse switch setup. If you can find a wiring diagram for the wipers thatll be a big help, otherwise just probe it before you remove it, and reuse that part of the loom.

Brakes/reverse/headlights are all simple relay circuits as well obviously. There are some pics in our build thread BUT its not finished yet so its not zip tied and conduited so it looks like a head ache but really its not.