Service Campaign 74-05
MODELS
AFFECTED: 2022 & 2023 EKKO
DATE:

November 3, 2023

SUBJECT:

Blind Spot Monitoring System
Please forward this information to your RV Service Manager.

Winnebago Motorhomes is conducting a Field Service Campaign on certain 2022 and 2023 EKKO models to update
the blind spot monitoring system.

Affected Vehicles and Owner Notification
Attached to this letter is a list of subject vehicles which were shipped to your dealership. Customers with affected
vehicles are being sent a letter notifying them of the service campaign. Owners are directed to contact a Winnebago
Motorhome dealer for the service campaign to be performed at no cost to them. A copy of the owner notice is provided
for your information.
Repair Procedure:
Refer to instruction sheet provided with parts kit or on WinPortal.
Parts Information:
The part order should be placed as an R: Recall type order. You will need the campaign dealer number and the
Winnebago serial number for the affected vehicle to place the order. Multiple serial numbers may be placed on a
single order.
Campaign Dealer Number: 7843

Quantity
1

Part Description

Winnebago Industries Part Number

EKKO Blind Spot Upgrade

SC7843-24-705

Reimbursement
When the service has been completed, submit a warranty claim using the operation number and TIC code listed
below.
OPERATION
TIME
TIC
DESCRIPTION
NUMBER
ALLOWANCE
CODE
Blind Spot Monitoring System

05740599

3.5

7405SB

If the vehicle is out of warranty, use service authorization 73G7405T when filing your claim.

FINAL CLAIMS NEED TO BE SUBMITTED BY MAY 3, 2024.
Perform this procedure on all subject vehicles currently in your inventory. DO NOT DELIVER ANY SUBJECT UNITS
TO A CUSTOMER UNTIL THIS CORRECTIVE ACTION HAS BEEN TAKEN.
If You Need Assistance
If dealer technical assistance is needed, please contact the Winnebago Motorhome Technical Service Department at
(866) 653-4329 from 8:00 a.m. to 4:30 p.m. Central Time or by e-mail at: [email protected].
Thank you for your cooperation.

Dean Casad
Director, Customer Support
1

RE:

BODY SERIAL
CHASSIS SERIAL

Dear Winnebago RV Owner:
When you purchased your new Winnebago RV, you also received our commitment to provide you with a quality
product and our dedication to continuing customer satisfaction. In keeping with this commitment, we are notifying you
of a service campaign that may affect your Winnebago RV.
Winnebago is conducting a Field Service Campaign on certain 2022 and 2023 EKKO models to update the blind spot
monitoring system.
Our records indicate that you have purchased a vehicle with the serial number which appears above.
What We Will Do
Your Winnebago dealer will install the upgraded blind spot monitoring system.
What You Should Do
Contact your Winnebago dealer to arrange for a service appointment. Please allow sufficient time for your dealer to
process your vehicle on the date of the appointment. The actual repair will take approximately 4 hours however your
dealer may require additional time to process your coach.
Important
This campaign and offer to provide service is at NO COST TO YOU and is valid until May 3, 2024, at which time the
campaign will be closed.
If You Need Assistance
If you have questions or need assistance, please contact Winnebago Motorhome Customer Care at (800) 537-1885
Monday through Friday from 8:00 a.m. to 4:30 p.m. Central Time or by email: [email protected].
We are sorry to cause you this inconvenience. We have taken this action in the interest of your continued satisfaction
with our products. This letter does not constitute an acknowledgement of legal liability.
Thank you for choosing a Winnebago RV.

Winnebago
Forest City, IA 50436

2

Ekko ASA Blind Spot Update:

1

3

2

5

4

Tools and Shop Supplies required1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.

Ratchet with 10mm socket.
Screw gun with #2 Philips.
Drill with 1" Hole Saw.
Cutting implement.
Wire strippers.
Scraper/Putty knife.
Cartridge gun.
Plastic trim tools.
Half round file.
Manus Sealant (185987-03-02A or equivalent).
Electrical tape.
Surface cleaner.

6

1

8

7

9

3

2

10

11

12

4,5

6

Part required - SC7843-24-705 Ekko Blind Spot Upgrade
Kit contains:
1.
2.
3.
4.
5.
6.
7.
8.

ASA Harness - 357553-01-000.
LH and RH Sensors - 357575-01-000.
Blind Spot ECU Module - 357552-01-000.
Small P-clamp - 083610-01-000 (5) and screw 000G39-10-12T (5).
Large P-clamp - 083610 –03-000 (5) and screw 000G39-10-12T (5).
Zip ties - 008343-04-000 (25).
Butt splice – 326774-01-000 (4).
2A In-line Fuse Harness - 358121-01-000.

7

8

© 2023 Winnebago Industries

1

Step 1 – Pre-rework Prep
1.

Disconnect the 110v power cord from the coach, See Image 1.

2.

Turn off the house disconnect switch, See Image 2.

3.

Turn off the 12v battery 250-amp main breaker/breakers, See Image 3.

4. Turn off the inverter disconnect, See Image 4.
5.

Turn off the 12v house battery/batteries by holding down the power
button on the top of the battery/batteries for 3 seconds. Make sure the
blue LED lights are off, See Image 5.

6.

Allow for engine bay area and exhaust to cool.

Image 1

Image 2

Image 3

Image 4

Image 5

© 2023 Winnebago Industries

2

Step 2 – Remove Original Harness
1.

Locate the ASA blind spot monitor sensors locate at the rear of the
coach, See Image 1.

2.

Under the coach, disconnect the blind spot sensors from the original
ASA harness.

3.

Starting from the rear and working towards the engine bay, pull the
harness out of P-clamps or cut zip ties as necessary. Make note of the
routing of the original harness as this will be roughly followed by the
new harness.

4. Gain access to the ASA ECU module, located under the steering
column in the dash area. Access can be achieved by removing the
closeout panel - attached via clips, below the steering column. See
Image 2, Yellow arrow for ECU module location.
5.

Disconnect the harness 16-pin plug from the module.

6.

Cut all 5 butt splices made between the ASA harness and the
Winnebago harness. Leave part of the ASA harness for easy
identification when reconnecting the new harness. See Image 3.

Image 2

Image 3

Image 1

© 2023 Winnebago Industries

3

Step 2 – Remove Original Harness (Cont.)
1.

Gain access to the connectors between the ASA harness and the buzzer, GPS
module, and Left/Right LED lights.
a) The buzzer should be mounted under the steering column along with the
ECU module. Disconnect the 2-pin connector while ensuring the buzzer
stays mounted down.
b) The GPS module and left LED connectors are both routed toward the
driver side A-pillar, See Image 1 and 2, Yellow arrows for respective
component locations. Remove the Driver side assist handle using a 10mm
socket on the two mounting bolts, See Image 2, Red arrows. Using plastic
trim tools or by hand, detach the Driver side A-pillar cover which is
now secured only by tabs, See Image 3. Additionally, remove the Driver
side dash cupholder by rotating to disengage the mounting features and
pulling out, See Image 4 and 5. With these removed follow the wires and
locate the connectors for each component. Disconnect and pull the ASA
harness side back through leaving the components in place.

Image 1

Image 4

Image 2

Image 3

Image 5
Image 1

© 2023 Winnebago Industries

4

Step 2 – Remove Original Harness (Cont.)
c) The right LED connector is routed toward the passenger side A-pillar.
Remove the same parts as listed in b), along with removing the
passenger side stepwell cupholder and center console covers, See Image
1 and 2. The glove box can also be dropped down to gain additional
access, See Image 3. With these removed follow the wires and locate the
2-pin connector for the LED. Disconnect and pull the ASA harness side
back through leaving the LED in place.
2. Pull the original ASA harness through the firewall and drop through the engine
bay to fully remove it.

Image 1

Image 3

Image 2

© 2023 Winnebago Industries

5

Step 3 – Prep Firewall Passthrough
1.

With the ASA harness removed, there still may be some Winnebago harnesses passing though the firewall outside of the Ford gro mmet.
If this is the case, disconnect the harnesses and pull back until nothing is passing between the grommet and the firewall, en sure the
grommet is fully seated in the cutout, See Image 1, Yellow arrow.

2.

Mark and cut a roughly 2" slit into the Ford grommet, ensuring that no wiring is damaged in the process and the integrity of the
grommet is retained. Be careful as there is both Ford and Winnebago harnesses on either side of the grommet, See Image 1, red arrows.

3.

If any Winnebago harnesses were disconnected, pass them through this new opening in the Ford grommet and reconnect, See Image
2.

Image 1

Image 2

© 2023 Winnebago Industries

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Step 3 – Prep Sidewall
1.

At the rear of the coach, use the screw gun with #2 Philips bit to remove the 4 screws mounting each blind spot sensor to the
sidewalls. Use a putty knife and surface cleaner as needed to remove the sensors and clean away any residual sealant to
ensure a clean and smooth mounting surface, See Image 1 and 2.

2.

Using a drill equipped with a 1"-hole saw, cut hole for the new blind spot sensor wiring. Locate this hole on the rearward side
of the original sidewall slot, See Image 2. Drill from underneath the coach on the inside of the sidewall towards the exterior
to ensure you go through the correct area of the sidewall tube, See Image 3 and 4. As you cut, be careful not to apply
excessive force or drill speed to avoid damage to the exterior fiberglass. Once cut, use a half round file to clean up the ho le
and ensure no sharp burrs or edges are present to potentially damage the sensor wire.

Image 1

Image 2

Image 3
Driver Side

Image 4
Passenger Side

© 2023 Winnebago Industries

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Step 4 – Install New Sensors and Harness
1.

Install the new sensors to the sidewall, being careful to follow the orientation directions molded into the sensor housings.

a)

Use fasteners supplied with the new sensors. Should screws not bite into sidewall material, add in something such as a zip ti e end into
the hole to allow the screw to gain retention.

b)

Cap sealing the sensor to the sidewall is not necessary.

2.

Use sealant to seal the 1" holes from beneath the coach, See Image 1. Tool to ensure no water intrusion into sidewall.

3.

Connect the sensors to the correct plugs in the harness. Harness branches are labeled for left or right.

4.

At the backwall, secure immediately before and after the connector with P-clamps, and at least every 18" as the branches follow the backwall.
Clamps should be screwed up to the metal tubes or trim, do not screw into the floor as it has minimal screw retention. If other clamps or screwmounted zip ties are fastened to the floor, replace with a P-clamp fastened to a metal tube. Ensure the harness is fully secured up and away
from the exhaust, See Image 2 and 3, Yellow arrows.

Image 1

Image 2 – Passengers Side

Image 3 – Drivers Side

© 2023 Winnebago Industries

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Step 4 – Install New Sensors and Harness (Cont.)
Image 1
1.

From the backwall, follow the original
ASA harness path with the new ASA
harness, secure at least every 18" with zip
ties to the other below floor wire looms
and/or chassis frame mounting
holes, See Image 1 through 6 which are
in order starting from the hitch and
ending just forward of the battery
compartment and show examples of zip
tie locations. Yellow arrows highlight zip
ties that were added to support harness.
a) Ensure the harness does not have
freedom to sag down or chafe
during coach operation.

Image 4

Image 2

Image 5

Image 3

Image 6

b) Support harness at least every 18".

c) Coil excess ASA harness length and
secure between the battery
compartment paneling and the
tube structure supporting it, See
Image 5.

© 2023 Winnebago Industries

9

Step 4 – Install New Sensors and Harness (Cont.)
1.

As the harness reaches the engine bay area,
ensure it cannot contact any hot or moving
components. Follow Winnebago harness
bundles and secure every 18" or closer to
ensure a safe wire path, See Image 1 through
4 Yellow arrows, which are in order from
forward of the battery compartment to just
before the Ford firewall grommet.

2.

If the Ekko Charging Recall #174 was
completed there should be a 2.5" P-clamp
over the driver side of the front axle; ensure
the harness passes through this P-clamp, See
Image 2, Red arrow. If the clamp is
missing, check the serial number for any
other open Recall or Service Campaigns.

3.

Image 1

Image 2

Image 3

Image 4

Pass the harness through the firewall using
the previously created cut into the Ford
grommet.

© 2023 Winnebago Industries

10

Step 5 – Connect the New Harness
Image 1
1.

Connect the passenger side LED to the harness branch labeled
'Right LED". Follow the original harness path from under
the steering column, under the center console, behind the glove
box, and up to the A-pillar.

2.

Secure excess wiring with zip ties to ensure no wires are visible to
the owner and the wire will not get pinched, chafed, or otherwise
damaged during reinstallation or operation of the coach, See Image
1 for example of excess cable management.

3.

Reinstall all Ford plastic trim components, cup holders, and assist
handles.

4. In the engine bay, use sealant to seal around the cut in the Ford
grommet and any harness passing through it. Tool to protect from
water intrusion into coach, See Image 2.

Image 2

© 2023 Winnebago Industries

11

Step 5 – Connect the New Harness (Cont.)
Image 2
1.

Connect the ASA harness 12 pin connector to the ASA ECU module.

2.

Make the 5 butt splice connections between the ASA harness and Winnebago harness
under the steering column, See Image 1.
a) Check for a 2A fuse attached to the red/ power KE circuit underneath the steering
column. If it is not present, add the 2A in line fuse between the Winnebago harness
and the ASA harness, See Image 2 Yellow arrow.

3.

Connect the ASA harness branch labeled 'Buzzer' to the Buzzer under the steering
column.

4.

Connect the driver side LED and GPS module to their respectively labeled branches.
Follow the original harness path from under the steering column up to the A-pillar.

Image 1

© 2023 Winnebago Industries

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Step 6 - Testing
1.

Once all service items are complete, take the coach
out to a safe stretch of road.

2.

Reach at least 13 mph and confirm the following for
both sides of the coach:

3.

1.

The appropriate LED lights up as vehicles enter
the blind spot, and that the LED turns off when
the blind spot is cleared.

2.

The appropriate led flashes and buzzer sounds
if a vehicle is in the blind spot and the coaches
turn signal is activated.

The rework is now complete.

© 2023 Winnebago Industries

13