Ok so i'm going with my haltech install but I can't find any straight forward walkthrough or article on cutting out the wiper sub-harness from the main ECU unit. I searched here and in the Haltech section to no success. Does anyone have a diagram or pic of which wires need to remain and which ones need to be snip'd off?


Santiago

 

nevermind....

 

Yo dude, they are two separate harnesses. The wiper harness from the motor goes into the kick panel in the passenger side, under the dash. It is SEPARATE from the engine harness, but it does go through the firewall WITH it... just filet up the old electrical tape and you will be able to separate the two rather easily.

PS: It's been covered in the haltech forum a few times

James

 

Perhaps I have a special harness or something. Mine intertwines and the blue wires that are off the wiper connector end up at an ECU connector.

 

no, you just take the tape and crap off your main harness and remove the wiper harness

 

Are you SURE the connector ends up at the ECU? The two harnesses are "intertwined" / taped up together. Since you're getting rid of the stock ECU and wiring anyway, unplug the ECU and pull the harness out, then cut it open and trace the wires from the wiper motor to the connector. If it's stock, it should be like this...

Don't cut up the grommet though, I reused mine when I ran my Haltech harness back through the firewall, and everything fit. Kind of a PITA, though...

James

 

The wiper wires are part of the engine harness.
To separate those wires, you need to take apart the engine harness itself.
I don't like to mess with the original wiring, since it's all gross and sticky from all the tape...not to mention the condition is suspect.

I rewire the wiper wires with new wiring and connectors.
This gives me peace of mind.
It's only 3 or 4 wires, and you just gotta splice them into the dash crossover harness.
This has been covered in the Haltech section.


-Ted

 

I guess I didn't make it clear. I have the main harness untaped.....


I'm pretty sure I followed the wires correctly through the mess of wires. I tried to separate the sub-harness from the main bundle but like I said it intertwines and then I followed the wires to one of the three connectors that go into the ECU. I tried looking through the FSM for a diagram I could use(uber schematic noob btw) but I could not for the life of me find out that I could make sense of enough to figure out if I was following similar colored wires or if those are the actual ones I need. This is on an S5 N/a harness/car if that makes a difference at all. I was hoping someone had a straight forward write-up(with photos/illustrations) but I guess I'll have to make one myself

 

Yea I figure I would need to put new wire in I just wanted to know what needs to go where. I've been away from the FSM far too long to be able to follow it, i'll have to spend some time looking at it again. Off the top of your head did any of them have a step-by-step process in the haltech section? I only found a handfull of threads and all with just general directions like 'once you open the harness you'll understand' and 'just cut the wires out' which doesn't help my mental text to action conversion!

 

take the black wiper plug and follow it down to the under dash connector then take a small screw driver and pop out all the unneeded wires. Now you have your wiper harness. Do the same if you want cruise control and the stock temp gauge to work.

 

Dude, I just wrote a reply that covered exactly this procedure. :P
It's like just a few weeks old, and I think it's still on the first page of posts?

The details were for an S5, but I do have the diagrams for an S4...
Which do you need?


-Ted

 

take pictures... the wiper harness should be a seperate harness that is taped together with the emissions harness

 

i am in the middle of doing this also and i am still confused on how to do it. i have the wiper/cruise harness completely seperate from the main harness. so do i have to splice it into the big plug that used to go to the ecu? or can i just plug it in where it went before? i am completely removing the stock ecu if that matters.

 

im taking pics and showing all this in the haltech section for future refferance.
seems people are lost when it comes to where its supposed to plug back into to get power for the wipers.

 

Damn, its really not that hard.

Remove ECU harness.. De-loom the wiper harness... Re-install! So easy! None of those functions are controlled by the ECU, so just pug the wipers and stuff back in, and press on!

 

The wiper wires are in he EMISSIONS HARNESS.

They stay in the EMISSIONS HARNESS until they reach either FEM-01 OR FEM-02 plugs that mate with the FRONT HARNESS. Sometimes these are called X-15 and X-16 instead of FEM-01 and FEM-02.

FEM means FRONT to EMISSIONS.

A jpg of the two plugs is attached. The wires don't go near the ECU, like the Mouse said above. Actually it's just the X-15 plug that has wipe wires. Oh well.

You see, I bought one of those big Red EASY buttons, and when I want to know something I just hit it. And Walla, there is the answer.