NHTSA ID Number: 10182425
Manufacturer Communication Number: 20201027
TSB/Document Date: 2020-11-12
Summary
On October 23, 2020 it was discovered by Wylie Manufacturing Co. personnel that we had a wiring issue on a total of 100 trailers. This issue originated with the use of a single-wire license plate lamp that was ordered when our usual license plate lamp inventory was depleted, and was used as a substitute with incorrect wiring procedures followed by assembly personnel. At that time we had used up the total inventory of 100 of the substitute lamps. We discovered we had 25 of the trailers
still on the yard, that had not yet shipped, but that 75 of the trailers had been shipped in the previous days leading up to the discovery of the wiring issue. The 25 on hand were corrected on site. We quickly identified all 75 of the trailers which had shipped with the incorrect wiring in place, by customer and location. We made the decision to send a replacement 2-wire license plate lamp because it would be straightforward to install correctly. The license plate lamp kits were preassembled by us and the kits were sent out so that all customers would receive the lamps within 2 business days. The attached memo was provided as instruction to the customers. We have asked affected customers to confirm that they have completed the change by emailing us.
Michael Etheridge
Senior Design Engineer
Wylie Mfg. Co.
PO Box 100
Petersburg, TX 79250
(806) 667 - 3566 - Ext 3119
Engineering
Memo
To:
All Stores and Sales Locations
Date: October 27, 2020
Re:
Incorrect License Plate Wiring on Certain Water Trailers – Procedure to Correct
We have identified a series of a total of 75 Water Trailers that were shipped from Wylie Mfg in
Petersburg TX to several locations and in some cases, directly to customers.
Please see attached page for your affected Serial Number/VIN list of affected units
Problem:
A single-wire license plate light was temporarily used that created confusion at installation. The
black wire on the license plate light is attached to the ground wire on the harness. The power
wire is attached to ground, creating the potential for a short circuit.
Solution:
Change out the license plate light. First, cut the black wire from the light, as well as white wire
from harness, just adjacent to the splicer connection, and discard splicer. Cut ring end off white
wire and discard ring end. Remove the existing silver lamp and discard. Install new black license
plate lamp with hardware. Strip insulation as needed from wire ends, and splice brown harness
wire to black, and white harness wire to white as shown below.
WHITE WIRE to White
BLACK WIRE to Brown
Above picture on the right applies to surge brake units only. Note: if you have a unit with electric
brakes, ground wire color may be different, and may vary by model. Please test polarity to verify.
If you have any questions, please do not hesitate to contact me at extension 3119 or Stephen Rankin
at extension 3108. Thanks – Michael Etheridge
Please confirm to Wylie Manufacturing that you have made the requested changes to your units, by email for
convenience, to Michael Etheridge at [email protected] as soon as practical after completion.
For Wylie locations, as per Standard Operating Procedure, please review, distribute among your sales personnel
and fax back your signed acknowledgement (WITH COMMENTS) to Michael Etheridge at the Petersburg
Office (806) 667-3392.
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TSB/Document ID: 20201027
Replacement Service Bulletin Number:
MFR Communication Date: 2020-10-27
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
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