[DIY] 92-00 Civic REAR Hatch Glass Intermittent Wiper Retrofit Guide - Honda-Tech


[DIY] 92-00 Civic REAR Hatch Glass Intermittent Wiper Retrofit Guide

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Old 02-13-2010, 09:20 PM   #1
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Default [DIY] 92-00 Civic REAR Hatch Glass Intermittent Wiper Retrofit Guide

[DIY] 92-00 Civic REAR Hatch Glass Intermittent Wiper Retrofit Guide

Background


I've always thought that the way the rear wiper functions on our Civics (4th, 5th, 6th Gens and probably others) was pretty lame. I find it annoying in two ways:
  1. The most obvious is that the wiper is either ON or OFF. It functions (wipes) very fast -- I think I've only been through a couple of rainfalls which merited that speed. So, it's faster than the average rainfall can keep it wet, and faster than any snow or salty road spray can collect. Your options, then, are few: Leave it on, wiping a mostly dry window and probably degrading the wiper rubber and generally looking stupid, or manually turning it on and off.
  2. When you MIST the rear window (twist down), you have to manually turn it to ON to make it wipe to clear the fluid. Otherwise, it just dribbles down the back of the car. Really, Honda? You didn't think this one through did you?
It's right about now that some of you are probably saying "just delete your rear wiper and it's problem solved". This may work for you, but not for me... and presumably not for many others who find the utility of a rear wiper quite practical. In fact, I wrote the DIY on retrofitting a rear wiper to a 5th Gen Civic.

So, some of you may know, but probably not very many of you, that the European Domestic Market (EDM) 6th Gen Civics had a REAR intermittent wiper during model years 1998-2000. Presumably, this is because the Europeans would no longer tolerate this sorry state of automobile engineering. It consists of a separate relay box mounted under the dash between the steering column and the heater control unit.

Upon learning this, it occurred to me that a retrofit would be possible on a 5th or 6th Gen Civic and would be relatively easy, provided I could find that all-important relay. But I'm in North America (Canada, actually), so where to look?

The answer lies in a 1997 Honda CR-V. So the 98+ CR-V models all had their rear intermittent wiper functionality integrated into the ICU, BUT the 97 model ONLY had a separate relay box. And, lucky me, there were TWO 97 CR-Vs in the local wrecker yard.

You'll find the box between the steering column and the heater control unit center console. It's grey and labelled with its part number 38650-SV5-G01. Technically, this isn't the same part number as in the EDM 98-00 Civic, but I believe this is only due to the shape of the bracket it comes with in Europe. The wiring for the 97 CR-V and the EDM 98-00 Civic are identical.

The following instructions are specifically for a 5th Gen Civic Hatchback, but could easily be applied to a 6th Gen with little or no modification.

(SPRING 2012 EDIT: FYI - With further research I have discovered that it is possible to swap a 98-01 CRV ICU with integrated rear intermittent wiper function into a 5th Gen Civic. I have completed a retrofit on my own vehicle but have not completed the write-up for this. But, if you are having trouble finding an elusive 1997 CR-V, know that a retrofit is also possible using parts from the 98-01 also. Note that this ICU performs about 4 or 5 full wipes before entering intermittent mode.)


Tool List


The bare minimum you will need is:

Philips screwdrivers
Tiny screwdriver for removing wiring pins from connectors
Wire snips
Metric socket set
Wiring supplies like butt and/or bullet connectors, wiring crimps, etc., and/or equipment for soldering wires, electrical tape
Spare lengths of wires with MALE pins - colours required are GRN, GRN/BLK, LT GRN, LT GRN/BLK
Drill bits or spot-weld remover (~5/16”)

Approx. 40cm of ~3/4" split-loom harness

Pin Removal


You'll have to do a bit of this. A tiny screwdriver is your friend. Look up on honda-tech.com the correct way to remove pins from connectors, or consult this comprehensive guide.

Project Difficulty and Time Commitment

This project is not difficult, especially since I've given you all the information you need to perform the wiring. Budget an hour+ foraging for the parts in the salvage yard. It took me 3 hours to re-install, working at a medium pace, including fabricating my wiring patch harness.

Disclaimer
Or, "Don't point fingers, you only have yourself to blame"

Every effort has been made to make these instructions as complete and accurate as possible, but no warranty or fitness is implied. The information is provided on an “as is” basis. The author(s) and the website/publisher(s) shall have neither liability nor responsibility to any person or entity with respect to any loss or damages or inconvenience arising from the information contained herein, nor due to any omissions. Read: Don't muck up your vehicle and try to blame me or anyone else. You are responsible for your own due diligence and research.


Parts Required & Removal Instructions

From the Salvage Yard

Find a 1997 Honda CR-V at the wreckers (10th digit of VIN will be “V”)...
  • Remove the Rear Intermittent Washer/Wiper Relay from the under-side of the dash, with a LONG length of pigtail … about 35cm.
    • Part number is marked on it: 38650-SV5-G01
    • Spot welded to it is the Interlock relay (if the CR-V is an AT)
    • Keep the bolt
  • Get the connector and pigtail from behind the Rear Wiper/Washer Switch
    • Try to get the wiring to past where the GRN and the GRN/BLK wires are split (under blue tape, probably). This means spending some time disassembling the wiring loom, but it makes your job easier when you need to put it all back together.
Find a 1992-95 Honda Civic 4dr Sedan with Power Windows/Lock
  • Remove the MALE connector and ~10cm pigtail from inside one of the rear doors
    • This connector will fit into the female connector of your Civic’s rear wiper/washer switch.
    • Getting this connector means you do not have to cut and splice any of your vehicle’s existing wiring.
    • I suspect there are many other possible donor vehicle models which will have this same male connector so check around in the junkyard.

The above parts are illustrated in Figure 1.


Figure 1.

Installation Instructions

The low-down: Basically you're mounting the relay under the dash, then creating a patch cable between your current Civic’s RR. W/W switch and going to the CR-V’s RR Int. W/W Relay and the CR-V’s RR. W/W switch pigtail that you removed.


Before You Begin
  • Remove the negative cable of your battery before performing any electrical work on your vehicle.


The Relay
  • Notice that the bracket for the relay is spot welded to another relay? That’s annoying.
    • Drilling it out with either a spot weld driller (fast) (Fig 2) or some drill bits (medium-fast) will create a nice hole which you will use to then mount the bracket under the dash.

Figure 2.


Cabin: Under Dash
  • Remove the under-dash knee bolster and the steering column covers. Remove the connector from the RR W/W switch (Figure 3)
  • Mount the relay with the 10mm mounting bolt you removed - see Figure 4
  • Examine the distance the wiring has to travel from the relay to the RR W/W switch - about 35-40 cm.
  • Trim the plastics sticking out around the junction connector you removed

Figure 3.


Figure 4.

Wiring
  • OK, the wiring is confusing. I had a diagram here but it even confused me when I looked at it … and I MADE it.
  • I am **** and I removed the pins from the RR W/W junction connector that I pulled and supplied new wires that I salvaged that were the correct colour (except the BLK one - just coloured that in with a Sharpie)
  • The easiest way to figure out the wiring is to look at Figure 5 and 6 below and read what I write here:
    • From the CR-V RR W/W pigtail, connect
      • LT GRN/RED to the Relay (easy)
      • Both GRN to PIN I on the RR W/W connector junction, AND to the Relay
      • GRN/BLK to PIN H on the RR W/W connector junction AND to the Relay
    • From the CR-V RR Int W/W Relay, connect:
      • LT GRN, LT GRN/BLK and BLK to PINS J, K and L (in that order - easy) on the RR W/W connector junction
  • End result will look like Figure 5. Wrap your wiring in a split wiring loom and tape it up a bit (Figure 4).

Figure 5.



Figure 6.

  • Insert the patch cable connectors in their place (Figure 7)

Figure 7.


Test Drive
  • Reconnect your battery.
  • Normal operation will involve:
    • Turn your ignition to IG1.
    • Turn towards you to spray washer fluid. The wiper will wipe 2 or 3 times automatically.
    • Turn away from you one notch. The wiper will operate with a delay between wipes.
    • Turn away from you once more to spray fluid again. The wiper will wipe 2 or 3 times automatically then return to operating with a delay between wipes.
    • If it does not work on the first try, troubleshoot all your connections. I had a bad connection on the relay and had to adjust one of the pins on the relay’s connector. A fluke problem but definitely a challenge to solve.
    • I wouldn't completely reassemble all your parts before your first test try. Leave off certain pieces of trim to make it easier to troubleshoot if you encounter problems.


Good Luck, and now with an intermittent function, I think you’ll see that it’s a much better way for it to operate!

DeSchlong
December, 2010

NOTE: I’ll post a movie of the operation soon.....

Last edited by deschlong; 07-17-2013 at 09:42 PM. Reason: Major update with photos. 98+ CRV parts also work.
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Old 04-22-2010, 09:00 PM   #2
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Default Re: [DIY] 92-00 Civic REAR Hatch Glass Intermittent Wiper Retrofit Guide

I completely agree with 1. and 2.

I hate how its too fast and not intermittent and hate how it just keeps dripping there. I always thought I was missing a nozzle lol! This is so much work though and sourcing these parts are never easy. I take off my hat to you though, these DIYs are off the chain, Im surprised your threads aren't very popular. Too much hassle for your average tuner I guess.
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Old 04-23-2010, 05:24 PM   #3
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Default Re: [DIY] 92-00 Civic REAR Hatch Glass Intermittent Wiper Retrofit Guide

I'll never be able to do this since I have a coupe, but your DIY write-ups are top-notch. I'll be doing the cabin air filter retrofit soon and will be taking pics to add to it.

Great job again!
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Old 04-23-2010, 08:48 PM   #4
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Default Re: [DIY] 92-00 Civic REAR Hatch Glass Intermittent Wiper Retrofit Guide

nice write up. if only i could find a hatch to sell my coupe for... lol
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Old 10-01-2010, 02:00 PM   #5
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Default Re: [DIY] 92-00 Civic REAR Hatch Glass Intermittent Wiper Retrofit Guide

very good DIY. I've done it in my hatch and it works great.
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Old 12-30-2010, 07:11 PM   #6
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Default Re: [DIY] 92-00 Civic REAR Hatch Glass Intermittent Wiper Retrofit Guide

MAJOR update of this DIY, including photos.
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Old 07-16-2013, 05:51 PM   #7
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Default Re: [DIY] 92-00 Civic REAR Hatch Glass Intermittent Wiper Retrofit Guide

Just so I am clear I can do all this retro fit OR i can just grab an ECU from a 98 or better civic?
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Old 07-17-2013, 09:41 PM   #8
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Default Re: [DIY] 92-00 Civic REAR Hatch Glass Intermittent Wiper Retrofit Guide

No. This write-up uses parts from a 1997 CRV. HOWEVER, you can use the ICU (NOT ECU) from a 1998-2001 CRV ... but you'll have to figure out wiring on your own. I did this but haven't put pen to paper / fingers to keyboard to explain it.

I clarified my edit to the OP to state that I am only talking about CRV ICUs.
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Old 11-23-2013, 07:51 AM   #9
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Default Re: [DIY] 92-00 Civic REAR Hatch Glass Intermittent Wiper Retrofit Guide

Great write-up! I just got a DC2 ITR UKDM -98Spec main harness for my EG/EJ Custom ABS retrofit and it came with DC2 ICU. I noticed that it uses same connectors than EG, but there is many additional components inside it and couple spare pins:

Civic EJ2 left, DC2 ITR right:







Im just thinking that what is the additional relay in DC2 ICU and what are the other differences. If i plug it to my EJ2, is there going to be any noticeable differences in some functions? I can get the schematics for both cars and study them myself, but if someone have tried this and could tell experiences it would be great!
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Old 01-20-2015, 02:48 PM   #10
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Default Re: [DIY] 92-00 Civic REAR Hatch Glass Intermittent Wiper Retrofit Guide

Any chance you have a pic of the control unit plug and wires?



Thanks

Last edited by deschlong; 01-20-2015 at 03:27 PM. Reason: No need to quote the whole original post.
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Old 01-20-2015, 03:28 PM   #11
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Default Re: [DIY] 92-00 Civic REAR Hatch Glass Intermittent Wiper Retrofit Guide

^ Yep, Figure 1 and 5 in the DIY!
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Old 01-20-2015, 03:37 PM   #12
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Default Re: [DIY] 92-00 Civic REAR Hatch Glass Intermittent Wiper Retrofit Guide

Quote:
Originally Posted by deschlong View Post
^ Yep, Figure 1 and 5 in the DIY!
I did see those.
I was hopping for what wire goes to which pins in the controller.
H-h, I-i, ect....
Got mine off eBay, no plug.
So I'm planning on by passing the plug in the unit and just adding two OEM plugs from a wrecking yard Civic.
Hack a trashed harness....
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Old 01-20-2015, 03:43 PM   #13
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Default Re: [DIY] 92-00 Civic REAR Hatch Glass Intermittent Wiper Retrofit Guide

Use Google to hunt for the CR-V service manual. Info is in there. You should be able to poach a connector from some other Honda. Off the top of my head, the plugs that go into the door lock relays are very similar, though the number of pins may differ.
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Old 01-20-2015, 04:13 PM   #14
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Default Re: [DIY] 92-00 Civic REAR Hatch Glass Intermittent Wiper Retrofit Guide

Yippy.... I never did have much luck searching the internet...
Was just dumb luck I found this dyi.
Not even sure what I WAS looking for when I found it...

No pics for me?
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Old 03-01-2016, 05:35 PM   #15
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Default Re: [DIY] 92-00 Civic REAR Hatch Glass Intermittent Wiper Retrofit Guide

i know i'm bumping an old thread here and this may not be the right place for it:

Deschlong, was the ICU swap a direct replacement. meaning, did all other function work without having to re-pin anything?

I just tried an ICU replacement on my EK. I pulled the ICU from a 99 CRV. Part Number 38600-S10-A01-M1
I can report that the rear wiper doesn't go into intermittent mode.
The front wipers also don't function properly using the CRV ICU. They would run in high speed at all time and when turned off would not return to the "parked" position.
Any insight you can provide deschlong?

I've included picture of the 2 modules here: the white one is the CRV, the black the EK.





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Old 03-02-2016, 11:53 AM   #16
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Default Re: [DIY] 92-00 Civic REAR Hatch Glass Intermittent Wiper Retrofit Guide

^ You're doing it wrong. You need to repin the connector, function-for-function on EK/EG vs. CRV. Compare the wiring diagrams. Obv. you need the CRV pigtail since the connector is different.

Also, adding wires is necessary for rear intermittent. Re-read this DIY. It's the same principle using a subharness only it doesn't use an external control unit for rear intermittent, it uses the ICU.
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