What is needed to add a heating steering wheel to a car that didnt come with it? I have the wheel itself, the clockspring, and the switch. Im aware I will have to rig the wiring up since the dash harness is different. From what I can gather all I am missing is the wiring itself and a relay - can anyone confirm if thats correct? Im also reading somewhere that Ill need to add another harness connector behind the steering wheel or cannibalize either the cruise control or audio control harness - i use neither so i wouldnt mind that but Im not understanding what purpose thats serves if I already have the small connector for heated steering that is part of my new clockspring.

If anyone can steer me in the right direction Id be very grateful. Cant imagine itd be hard to wire up, just could use some pointers on what goes where. Thanks guys.

Edit 1/14 : I think I have it more or less figured out. Going to check some wiring stuff tomorrow which will more or less confirm what I need to do here. If im understanding everything correctly this will be a little tedious and involved but shouldnt be physically difficult. Ill turn this into a How-To thread if i manage to make it work.

 

Are you sure you don't have the wiring?
Because check this out.
https://www.nissanpartsdeal.com/part...595-5y700.html

Because ALL 2002-2003 have the same CONTROL-SMART ENTRANCE . This thing..
It appears you either have the wiring already ,or you just need that harness . You probably have everything else except the fuses and relays.

 

The harness that goes to the Steering Wheel Heater Switch isnt on my car. Forgot to grab it from that dude while I was there so im gonna have him mail it to me. That connects to the Smart Entrance Control Module (SECM) - which means Im going to have to repin that big connector as well since the pins it would be using are almost certainly not there either. Not really sure where to get those so Ill probably just have him cut off the connector for his SECM so i can cannibalize it for the pins and just solder them up. Ive never really been a fluent reader of electrical diagrams but I spent a good while today staring at it and I think I understand how its wired.





Everything about this appears to be very basic soldering, except for having to repin that SECM connector (if thats even the case - ill be pulling it out tomorrow). Im a little fuzzy on whether or not the Heated Steering Switch gets power through the SECM or gets its own source though. Ill probably draw up a layman’s diagram to see if thatll help me make sense of everything.

 

I am confused ,if he is sending you the harness and you ALREADY have the smart control for heated steering wheel . Why the repining?

It doesn't look like the power comes from the smart control (i may be wrong) looks like it just controls it.

 

This is also on my list of things to do. I was going to attempt to get it into my 00 but found it easier to just buy another car.

 

His car is set up for the heated steering the 00 never came with it. even the cruise switches are different on the 00 .

 

The Smart Control is for all sorts of crap, heated steering being one of them. My dash harness did not have the connector/harness that plugs into the Heated Steering Switch - the wires from that connect to the Smart Control unit. Since Heated Steering Switch connector/harness isnt in my car, im assuming the connector to the Smart Control unit is lacking the terminals for Heated Steering. The unit itself has the pins, but Im assuming they are not touching anything (since the harness that would be linked to those pins isnt present) which means ill have to take apart that connector to add the terminals to it.

I could be wrong though, I didnt get a chance to look at the SEC yet.

 

Here is the switch and plug i have. looks like the switch needs more than power. But i am sure it could be done,but i would just get the harness.

 

There is only ONE smart control. One size fits all. If you get the harness your set.

As it shows in that nissan link, there is not a different one for heated steering or anything else.

 

I think the harness you have pictured and the relay are the only pieces missing. It needs to be hooked up to to the SEC though - which im assuming means taking apart it’s (the SEC’s) connector to add the terminals needed to make contact with the correct pins on the SEC. I know my SEC is capable of doing everything - just the connector attached to the SEC is presumably missing the terminals + wires that run to the HSW switch, since the harness for the HSW switch isnt present. The SEC connector has 40 something wires coming off of it - im assuming just not ones for HSW. My bad if this isnt making sense lol. Ill be taking pics tomorrow to show you what i mean.

 

That's why you have him send the harness(s).

The Smart control from your car is the same as his car. It's very easy to get to ,pull it out and look at the pins and the connectors. Count them,you will see there are extra ,but your harness doesn't have the pins. Have him send the stuff and then see if you need anything else.

 

Ahhhh ok I see what youre getting at. The problem with that is that the SEC controls all sorts of crap, and the harness runs all over the place. I feel like it would be easier to just repin my SEC connector than it would be to pull the dashboard out again and replace the entire harness. To me pulling the dash is a way more PITA task than repinning.

 

 

Have you ever used a pair of gloves like that, being in florida?

 

props to you if you get this all figured out !! =) def keep us posted

 

As expected, Ill need to add some terminals to the connectors for the Smart Entrance Control Unit. Luckily I kept the wiring harness from my HR motor swap to cannibalize for parts - chock full of connectors for me to steal terminals from. I can even match the wire colors to what the FSM has labeled!

Im having trouble making sense of how to route this into the fuse box though. I could just bypass the fuse box using additional wires + fuses but Id like to run it into there to get it close to OEM as possible. However, I cant seem to locate a detailed diagram of the fuse box layout in the FSM. I need to figure out what wires on the backside run to what fuses. Anyone able to give me a helping hand and tell me what page that diagram is on? If i can do it this way, it appears I should be able to tap into the existing harness setup rather than needing to run another power wire through the firewall/fender. Should be easy but without that diagram theres no way to figure out what needs to go where.

Other than that, I cant really proceed until I get the parts Im missing. Definitely a much more involved job than I thought it would be, but definitely doable. Once I get it done and have a write up on it this job should be quite simple as long as the person doing it is competent and has the right tools.

 

Hey guys, been a while but finally have all the pieces I need to get this going. Im kinda stuck on something I assume is very basic though. If you look at the above diagram, theres 2 or 3 spots where wires appear to connect and split towards 2 separate terminals; for example, the brown wire coming off of pin #4 of the heated steering switch connects to a brown wire that is between pin #5 of the relay and pin #1 of the combo switch.

How exactly does this get wired up? Common sense tells me to just tap into the wire and form like a T-junction with the wires, but on the other hand im not especially literate with reading electrical diagrams. Im curious how Nissan did this (or how someone who knows wtf theyre doing would)? I cant see them just tapping into the side of a wire and slapping some goop on it - did they use some sort of connectors for this? Again I know this is a pretty trivial detail but I just want this install to be clean as possible. I think Im just overlooking something fairy obvious.

As always thank you all in advance.

 

There are splices precisely as you described all over the place in the engine harness, I saw them myself when I stripped and reconditioned my swap motor harness. And yes, they use some kind of sticky as hell, black goop stuff. That **** was a pain in the *** and got everywhere. Make good solder connections and protect/insulate well. Don't overthink it.

Now, where are my damn pics?

 

Thanks dude. Actually came across a few of those splices you described, it really is that straight forward. As for pics - youll get them soon as my interior is done lol. Waiting on this project and a glovebox latch.


Cannot for the life of me figure out how to de-pin the Smart Entrance Control harnesses. Theres a little tab that can be popped out a few mm off the side of the connector but beyond that I cant find any way of freeing the pins. Its not like any of the other connectors ive taken apart. Really niche question but does anyone know how to open it up?

The pins I have off of my spare motor harness are not the correct size. Cant proceed until I figure out the correct size - which cant happen until I can take a pin out of the SECM connector to examine what it actually looks like.

This might have to be put off indefinitely unfortunately. Pretty much have it figured out I think but I cant continue until i can get the pin situation figured out. If it comes down to it I might have to get another connector from a junkyard and dissect it but Im really trying to avoid spending all that money for a stupid pin.