NHTSA ID Number: 10237015
Manufacturer Communication Number: TSB 602
TSB/Document Date: 2023-05-31
Summary
Several coaches built after 2023 ECO 300 (before the issue was discovered) may not have the charge wire hooked up properly between the battery isolation module located in the PDC box in the front passenger side bay and the front Newmar
fuse panel located under the driver’s side dash on the wall.
Newmar Corporation
PO Box 30
Nappanee, IN 46550
TSB 602
May 18, 2023
TECHNICAL SERVICE BULLETIN
AFFECTED MODELS
2023 :: Bay Star Sport, Bay Star, Canyon Star
DESCRIPTION
Several coaches built after 2023 ECO 300 (before the issue was discovered) may not have the
charge wire hooked up properly between the battery isolation module located in the PDC box in
the front passenger side bay and the front Newmar fuse panel located under the driver’s side
dash on the wall.
ISSUE
Without this wire hooked up to the F8 fuse at the fuse block, the house batteries may not charge
while driving.
UNITS AFFECTED
Please refer to the attached population list for affected units and VINs.
CORRECTIVE ACTION
Follow the attached instructions to inspect and reroute the wire if necessary. Call your Newmar
Service Account Manager to increase the time to .8 hr. and to order parts if a repair is necessary.
PARTS NEEDED
Item Description
Quantity
Newmar Part #
Disconnect 16-14g female spade blue
1 ea.
107187
Fuse, 7.5 ATC
1 ea.
107165
Conduit flexible ¼”
If needed
138810
Wire tew 16-1 blue w/white
If needed
20905
FLAT RATE CODE: TSB 602
LABOR TIME: .1 hr. for inspection, .8 hrs. for inspection and wire rerouting
IMPORTANT: Please read this bulletin in its entirety prior to beginning any diagnosis or repairs.
NOTICE: Any technical information published in this bulletin is intended for use only by a qualified, Newmar-authorized service technician. Newmar is not responsible for the misuse of this information.
Instruc�ons for Checking and/or Hooking Up a Charge Wire
The 16 ga. blue wire with a white stripe running between the batery isola�on module and the
Newmar fuse panel (F8) under the driver side of the dash may not be hooked up.
The wire runs through the wire loom hole in the front firewall near the center of the hood
opening, and then inside the coach across the dash to the driver’s side. The line should have
been hooked up to the terminal (F8) with a 7.5-amp fuse installed. At the �me of produc�on, in
many cases, the wire was mistakenly run back out through the firewall at the top driver’s side
under the dash and then up into the driver’s side a-pillar.
Remove the fuse box cover and inspect:
•
•
If there is a blue wire with a white stripe on the terminal for F8 and the 7.5-amp fuse is
in place in F8, reinstall the cover. Do not proceed with the remaining work instruc�ons.
If the F8 fuse terminal is empty, proceed with one of the processes outlined below.
Op�on 1 (Method used at Newmar)
With a flashlight and something to cut the zip �e
(such as diagonal pliers) handy, lay down under
driver’s side dash, and locate the loom at the top
driver’s side of the dash going through the
firewall. Look for a 16 ga. single blue wire with a
white stripe (located in a small loom by itself).
Once the wire is located, in most cases, it can be
pulled back through the firewall out of the apillar. It may be necessary to cut a couple of wire
�es to separate the wire looms to find the correct
loom containing the blue wire with a white stripe.
Cut to length, strip, and install female spade
terminal on F8 terminal, and install 7.5 ATC amp
fuse. Zip-�e any bundles of wires you removed zip
�es from and secure the wire running to the fuse
box as needed.
Op�on 2
With the hood open on the outside of the coach,
locate the wire where it first enters the firewall.
Cut the wire and splice on the new piece, running
the new sec�on of the wire to the F8 fuse on the
fuse block (it would be in its own loom here also,
as pictured). Loom and �e up wire as needed.
Op�on 3
Pull the a-pillar and find the wire, loosen, and reroute it to the fuse block, lengthening it if
needed. Route it down to the fuse block and loom/secure as needed. (No photo shown.)
General Note: Do not spend a bunch of �me digging for this wire, as it is not that difficult to
find. If you can’t find it in one spot, check in one of the other spot(s). Remember the blue wire
with a white stripe is the only wire in the small loom.
Tes�ng: A�er the blue wire with a white stripe is hooked up, you should be able to test the
house batery voltage and verify the house bateries are charging with the engine running.
Remember: the charge condi�ons must be met for charging to occur.
Prod#
VIN Number
USA UNITS
115512
115659
115660
115662
115663
115664
115665
115666
115667
115668
115669
115670
115672
115674
115675
115676
115678
115679
115681
115684
115685
115686
115687
115692
115693
115694
115695
115696
115697
115699
115700
115702
115703
115709
115710
115711
115712
115714
115715
115716
115720
115721
115723
115724
1F66F5DN1N0A09022
1F66F5DN8N0A08398
1F66F5DNXN0A11559
1F66F5DN7N0A16038
1F66F5DNXN0A09021
1F66F5DN8N0A11530
1F66F5DN5N0A11548
1F66F5DN6N0A08402
1F66F5DN9N0A08281
1F66F5DN7N0A09154
1F66F5DN0N0A11568
1F66F5DN0N0A08878
1F66F5DN6N0A11560
1F66F5DN4N0A16465
1F66F5DN6N0A11557
1F66F5DN2N0A08879
1F66F5DN8N0A09082
1F66F5DN7N0A11552
1F66F5DN8N0A08403
1F66F5DN1N0A11529
1F66F5DN5N0A05149
1F66F5DN3N0A05148
1F66F5DN7N0A11518
1F66F5DN9N0A08877
1F66F5DN5N0A11517
1F66F5DN8N0A09020
1F66F5DN8N0A16100
1F66F5DN9N0A08278
1F66F5DNXN0A11562
1F66F5DN5N0A16037
1F66F5DN8N0A11544
1F66F5DN4N0A11556
1F66F5DN1N0A09019
1F66F5DN9N0A11519
1F66F5DN8N0A15917
1F66F5DNXN0A15918
1F66F5DN8N0A11558
1F66F5DN7N0A11566
1F66F5DN1N0A18335
1F66F5DN3N0A18207
1F66F5DN9N0A09155
1F66F5DN2N0A16318
1F66F5DNXN0A05146
1F66F5DN6N0A16466
Year Brand Type Floor Chassis Date IN
2022
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
2023
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
BT
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
3014
3014
3225
3225
3225
2720
2720
3014
3014
2720
3315
2920
2920
3315
3014
3014
3014
3225
3225
2720
2813
2813
2720
3014
2720
3225
3225
3014
3014
3315
2720
3014
3225
2720
3225
3225
2920
3225
2920
2920
2813
2920
2813
3225
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
8/4/2022
9/12/2022
9/26/2022
1/16/2023
8/25/2022
12/13/2022
2/7/2023
10/17/2022
11/1/2022
12/12/2022
9/19/2022
8/10/2022
10/17/2022
10/18/2022
9/9/2022
8/8/2022
11/21/2022
8/5/2022
9/6/2022
10/14/2022
9/2/2022
9/1/2022
12/14/2022
8/4/2022
10/28/2022
8/23/2022
1/24/2023
9/16/2022
10/7/2022
1/13/2023
2/14/2023
9/8/2022
8/23/2022
10/13/2022
11/15/2022
11/18/2022
9/16/2022
9/9/2022
2/23/2023
1/23/2023
9/23/2022
1/23/2023
8/18/2022
10/20/2022
Date OFF
8/12/2022
9/21/2022
10/5/2022
1/24/2023
9/2/2022
12/22/2022
2/16/2023
10/25/2022
11/18/2022
12/20/2022
9/27/2022
8/18/2022
10/25/2022
10/26/2022
9/20/2022
8/16/2022
12/1/2022
8/15/2022
9/14/2022
10/24/2022
9/13/2022
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TSB/Document ID: TSB 602
Replacement Service Bulletin Number:
MFR Communication Date: 2023-05-18
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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