240sx S13 COMPLETE Car Re-Wire??

[duffy2323]

I was wondering if anyone out there has re-wired their entire car before. By this I mean taking out all the wires that are not essential (speakers,AC/Heater,Etc.). I have a 1993 240sx Hatchback Automatic that I have stripped to next to nothing and I am putting in an RB25DET Manual and would like to know What wires I can eliminate. I have a chiltons book to look up whats what if i do not know. Just wanna get some advice/input before I tear into it.
I took out the AC, Heater Core, and all of the vents and crap.

[compactfean]

Yes its definitely been done. I plan on doing the same thing this fall to further my weight reduction. I've gotta do my manual seatbelt swap and find some eastbear headlights that way I can get rid of the wiring for the automatic seatbelt control (there's alot!), automatic trans wiring and brain, and headlight motors wiring and brain. Also, all the extra wiring for door dummy lights, sensors, and the rest of the unneeded dummy light wiring . Also, there's plenty of wires in the engine harness that can go....get a pinout and dissect from there. Google " the ultimate s13 wire tuck" and there's a pretty decent right up. Im gonna do a right up when I do mine because that one is not very descriptive when it comes to how and what can be removed.

[duffy2323]

Thank you very much, I will be looking for your write up.

[duffy2323]

Ok, so far I have takin out the wiring for the rear defrost, power antenna, rear washer, rear wiper, all the dummy/map lights, ALL stereo wiring, A/C wiring, Heater and Blower, and all the switches and relays that won't be used.
I got a bucket full of wires now and I am taping all the needed wires back up. I will take pictures today and post them.

[compactfean]

Well damne that was quick... im gonna do my whole harness at once and put the relay/fuse boxes inside the car. Im keeping my heater and stereo though.

[duffy2323]

haha, yea. I just tore right in. took a lot of beer. i will weigh the wires too, its a lot of wires. I would like to do all the wiring under the hood while i have it tore apart, how hard is it to relocate the fuse boxes from under the hood to inside the car. I figured with the extra room from all the heater/ac crap gone, i can put stuff there.

[compactfean]

Shouldn't be to hard....just time consuming. There's a bunch of stuff In those fuse boxes that can go and a bunch of Wiring ...I mean a bunch,fog light crap, AC wiring crap.if you don't have pop up headlights almost that hole PS relay box could go! I know that to pull the fuse boxes into the cab dash and fenders have to be pulled.

[zachattack_5491]

Shouldn't be to hard....just time consuming. There's a bunch of stuff In those fuse boxes that can go and a bunch of Wiring ...I mean a bunch,fog light crap, AC wiring crap.if you don't have pop up headlights almost that hole PS relay box could go! I know that to pull the fuse boxes into the cab dash and fenders have to be pulled.

It's certainly time consuming. But it cleans things up in the engine bay and there's so much wiring that can be taken out. I still have stereo, pop ups, and heat but I had a huge bundle of wire after I finished. I encourage you to do it if you are competent enough to do it without messing anything up. It's one of the best things I've done to my car, now all my electronics work the way they should and my engine bay looks like sex.

[duffy2323]

Hahaha, hell yeah. I just started in on the engine bay wiring today. I took out all the horn s***, ac wires, fog light wires, and whatever else so far. The only thing I have a question about is the relay box and the fuse box. To relocate them to inside the car instead of the engine bay, do I just cut wires and solder them back up accordingly? or is there a better way. I just want to know before I cut the wrong thing. So far I only cut it if I know what it is, im not just hacking. another thing I was thinking of is relocating the Battery-I know people relocate to the trunk a lot, but I don't like the fact of having a huge 10 foot wire going from the trunk to the engine bay, kind of defeats the purpose of what I am doing IMO. I will have a lot of room under my dash, would that be a stupid idea or no?
Please let me have it if you think its stupid or dangerous in any way

[compactfean]

I don't think its a bad idea, but if you plan on ever taking your car to the drag strip or track im. Almost 100% sure it will not pass inspection I think. You have to have some sort of fire wall barrier. To bring the fuse and relay boxes inside you can depin the wires from the fuse box and relays. Or cut and resolder.

[zachattack_5491]

The only thing I have a question about is the relay box and the fuse box. To relocate them to inside the car instead of the engine bay, do I just cut wires and solder them back up accordingly? or is there a better way.

There might be a better way, but that's what I did. I cut maybe 1 or 2 feet between the SMJ and the relay box. My harness is now SMJ on the left in its original spot, relays in the middle under the dash, and fuse box on the right side behind the ECU. It's fairly strait forward. Just do a test fit every now and then so you can correct problems before it's too late.

another thing I was thinking of is relocating the Battery-I know people relocate to the trunk a lot, but I don't like the fact of having a huge 10 foot wire going from the trunk to the engine bay, kind of defeats the purpose of what I am doing IMO. I will have a lot of room under my dash, would that be a stupid idea or no?

Are you saying you want to somehow get the battery to the front of the car? If you aren't going to have passengers, that area would be good. There's no way you could fit even the smallest battery under the dash unless you removed everything from under there. And that would be a pita. What if you needed to get a jump? Just remember you need two wires from the battery: one to the starter, and one to that fuse box.

[duffy2323]

Good point on getting a jump, I have removed everything from under the dash, I have the dash off right now and completely gutted. I'm thinking I will leave the battery under the hood for now and just relocate the Fuse box and relay box to under/in the dash. I will have to get out the soldering gun and shrink tubing today and see what I can do. All I have is time right now. Thank you guys for helping me out so far, im gonna try to take pictures today of crap. I just get so into doing what I'm doing that I either forget or its night out all of a sudden.

[duffy2323]

Took out my auto seat belt system today. WOW, ALOT of wiring. Now I need to find manual seat belts from a JDM or CDM S13. Is it possible to use rear seat belts in the front, there are 2 bolt spots on both and I personally think it would work just fine but if you happen to know please let me know.

[compactfean]

When I fallowed the seat belt brain and harness I was like holey s***! Its huge! The rear seat belts wont work because of the angle at which they lock but seat belts from a 200sx or sentra will work almost perfect.

[duffy2323]

I got all of my wiring pretty much done, I relocated the fuse and relay boxes from under the hood to under the dash. I weighed the wire that was taken out of the car and it totaled 15 pounds. Plus there are all the boxes, air ducts, auto seat belts, and all the other un-needed crap. I took pics of it today and I will upload them when I get them on my computer. Now its time to get painted.

[compactfean]

Thats what im talking about! Im sure with the automatic seat belts and brain for the seat belts. And auto trans ( one extra step for me) im sure there's a good 40-50 lbs to be lost...not bad for just cleaning house! Lol.

[duffy2323]

Hell no, not bad at all. now i have a bunch of crap that I guess people buy sometimes. So I figure what the hell, im gonna try to sell all my unused parts.

[compactfean]

Did you convert your seat belts yet?

[duffy2323]

No, still looking for some. Nobody in my area has s*** for 240's

[compactfean]

95-99 sentra and 200sx seat belts should be plentiful in the wrecking yards.

[duffy2323]

I will check them out, thanks for the advice.