20-017 TSB

Disconnect Switch – Wiring
Technical Service Bulletin
TSB
Bulletin Type:
Bulletin #(s):
Job Code(s):
Publication Date:
Make(s):
Jayco
Model(s):
White Hawk
Jay Feather
20-017
9801511A Inspect ONLY .2
9801511B Inspect and Repair .75
Incident:
Affected Units:
August 2020
Model Year(s):
2020-2021
Wiring of the Disconnect Switch may be incorrect.
Please see Unit Listing at end of Instructions
Parts Kit #: 20-017J
Parts Kit:
Misc. Tools & Supplies:
20-017 Disconnect Switch - Wiring
Parts Kit Contents:
(2) large blue wing nuts
12-volt DC capable multi-meter
12-volt DC battery or battery jump pack
120-volt AC power source (to plug trailer into)
Wire strippers
Screw gun with square and Phillips tip bits
Flashlight or external light source
August 2020
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INSPECTION
The following 2-part inspection/diagnostic is required to:
 Determine if the electrical connection between the trailer 12-volt power converter and the trailer 12-volt
battery remains connected when the disconnect switch is turned to the “OFF” position.
 Determine if the disconnect switch properly interrupts power between the 12-volt fuse panel and the trailer 12volt battery.
 Determine if the disconnect switch properly interrupts power between the 12-volt fuse panel and the trailer 12volt power converter.
Part 1
1. Connect a charged 12-volt battery or 12-volt jump pack to
the trailer (if a trailer battery was not previously installed).
NOTE: Make sure the battery is correctly connected;
positive to positive (red); negative to negative (black).
2. Turn the battery disconnect switch “ON”
NOTE: The battery disconnect switch will be located in the front
storage compartment. If the unit does not have a battery
disconnect switch, it does not require inspection or repair.
3. Turn “ON” trailer awning or living area ceiling lights.
4. Turn the trailer disconnect switch “OFF” and verify awning or living area ceiling lights turn “OFF”.
 If lights remain illuminated, proceed to repair instructions.
 If lights turn “OFF” proceed to Part 2
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Part 2
1. Disconnect 12-volt battery (or 12-volt jump pack) from
trailer (if trailer battery was previously installed).
Terminal connection to the multi-meter
2. Plug the trailer into 120-volt power.
3. With disconnect switch in the “OFF” position use multimeter to verify voltage at disconnected battery cables
reads a nominal 13.6 volts DC.
 If nominal 13.6 volts not present proceed to repair
instructions.
 If nominal 13.6 volts present during Diagnostics Part 2,
and if lights properly turned “ON” and “OFF” during
Diagnostics Part 1, the disconnect switch is wired correctly
and no repair required.
INSTRUCTIONS
To determine which converter model is in your unit, locate the converter and open the converter door. The label
inside the converter box will have the model listed at the top. Proceed to the correct repair instruction according
to the model number on the label.
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Repair process for WF-8735 power converter assembly
1. Disconnect the trailer 120-volt power cord and 12-volt battery (if applicable). You will need to use an alternate
light source.
2. Locate the power converter. Loosen the (4) screws
holding front cover/door assembly on WF-8735 power
converter.
NOTE: Typically, the screw(s) are a capped screw that
will not come completely out of the cover/door
assembly.
3. Remove the (4) screws attaching power converter assembly to wall or cabinet. Pull the power converter
assembly out of the wall or cabinet.
4. Locate Pink 10-gauge and Orange 10-gauge wires exiting rear of power converter housing.
5. Determine the wire configuration for the unit you are repairing from the following detail and photos. Take a
photo or document the current wire configuration as a reference to help insure you are connecting the correct
wires during the repair.
NOTE: Wire colors may vary between units. Refer to both wire configurations before starting the repair so
you can determine the correct repair.
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Wire configuration 1 (see photos)
Original connection
Converter Pink 10-gauge wire connected trailer with the Black 10-gauge wire, AND
Converter Orange 10-gauge wire connected with the trailer Red 10-gauge wire
Change the wire connections so that:
Converter Pink 10-gauge wire connects with the trailer Red 10-gauge wire, AND
Converter Orange 10-gauge wire connects with the trailer Black 10-gauge wire
Wire configuration 2 (not shown)
Original connection
Converter Pink 10-gauge wire connected trailer with the Red 10-gauge wire, AND
Converter Orange 10-gauge wire connected trailer Black 10-gauge wire
Change the wire connections so that:
Converter Pink 10-gauge wire connects trailer Black 10-gauge wire, AND
Converter Orange 10-gauge wire connects trailer Red 10-gauge wire
Photos represent wire configuration 1
Converter PINK
Trailer BLACK
Converter ORANGE
Trailer Red
Converter ORANGE
Trailer BLACK
Converter PINK
Trailer Red
6. Remove the (colored) wire connectors and separate the wires.
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7. To insure a good connection, cut off the end of each wire. Using a wire
stripper, remove the wire insulation 5/8” back from the end of the wire.
Strip 5/8”
8. Referring to the photo or documentation for the original wire connection and the wire connection
configurations listed above, connect the appropriate wires using the blue wire nut connectors furnished with
this bulletin.
9. Repeat the part #1 and part #2 diagnostic steps (under Inspection at the beginning of this bulletin) to verify the
correct function of disconnect switch.
10. Re-install power converter assembly and cover.
Repair process trailer with WF-8540 power converter assembly
1. Disconnect the trailer 120-volt power cord and 12-volt battery (if applicable). You will need to use an alternate
light source
2. Locate the power converter. Loosen the (2) screws holding
front cover/door assembly on WF-8540 power converter.
NOTE: Typically, the screw is a capped screw that will not
come completely out of the converter.
3. Determine the wire configuration for the unit you are repairing from the following detail and photos. Take a
photo or document the current wire configuration as a reference to help insure you are connecting the correct
wires for the repair.
NOTE: Wire colors may vary between units. Refer to both wire configurations before starting the repair to
determine the correct repair.
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Wire configuration 1:
Original connection
Trailer Red 8 gauge wire is connected to circuit
board “BAT +” lug,
AND
Trailer Black 8 gauge wire is connected to circuit
board “POS IN+” lug
POS IN lug
Change the wire connections so that:
Trailer Black 8 gauge wire is connected to circuit
board “BAT +” lug,
AND
Trailer Red 8 gauge wire is connected to circuit board
“POS IN+” lug
Wire configuration 2:
Original connection
Trailer Black 8 gauge wire connected to circuit board
“BAT +” lug,
AND
Trailer Red 8 gauge wire connected to circuit board
“POS IN+” lug
BAT lug
POS IN
lug
Change the wire connections so that:
Trailer Red 8 gauge wire connects to circuit board
“BAT +” lug
AND
Trailer Black 8 gauge wire connects to circuit board
“POS IN+” lug
BAT lug
4. Loosen the set screw on the lug and remove the wire from both the BAT and POS IN lug.
5. To insure a good connection, cut off the end of each wire. Using a wire stripper,
remove the wire insulation 1/2” back from the end of the wire.
Strip 1/2
6. Referring to the photo or documentation for the original wire connection and the wire connection
configurations listed above, connect the appropriate wires to the appropriate lug. Firmly tighten the set screw.
7. Repeat the part #1 and part #2 diagnostic steps (under Inspection at the beginning of this bulletin) to verify the
correct function of disconnect switch.
8. Re-install power converter assembly and cover.
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Jayco’s sole obligation under our limited warranty is to repair or replace defective materials and/or workmanship
deemed our responsibility as determined by Jayco in our sole discretion. Jayco reserves the right to use new
and/or remanufactured parts or materials of similar quality to complete any work, and to make parts and/or
design changes as appropriate without notice to anyone. Jayco designs and/or materials changes are done
without obligation to incorporate such changes in previously manufactured product. Jayco makes every
reasonable effort to ensure field remedies will not adversely affect performance and/or safety of the unit. This
field remedy is not intended to extend to future performance of this RV, or any of its materials, components or
parts beyond the standard warranty period. The RV owner’s obligation to notify Jayco, or one of its independent,
authorized dealers, of a claimed defect does not modify any obligation placed on the RV owner to contact Jayco
directly when attempting to pursue remedies under state or federal law. Jan. 2019.
903 South Main Street • P.O. Box 460 • Middlebury, IN 46540
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+
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