NHTSA ID Number: 11028617
Manufacturer Communication Number: M1508
TSB/Document Date: 2026-02-06
Summary
SERVICE BULLETIN M1508 (REV C): 2009-2025 TRIKE PLATFORM - REVERSE MOTOR. PURPOSE: Revision C. To inform dealers of a running change for the new reverse motor (Part No. 83388-09C) for Trike models. As of January 28, 2020 all Trike platform vehicles will be manufactured using the new reverse motor. The new reverse motor will be used to replace reverse motor assemblies (Part No. 83388-09, 83388-09A,83388-09B) that have failed diagnostics. Refer to Table 3. This motor contains several improvements for better motor durability. A new procedure has been added, Refer to PINION EXTENDS BUT REVERSE MOTOR STALLS OR SPINS SLOWLY. REV C: Update Removal and Assembly (R&I) of the Solenoid. Updated: DISASSEMBLE, ASSEMBLE and Install Electrical Kit.
2.
1229458
Is voltage drop greater than 1 V?
1157346
(–)
R
BK
(+)
2
BK
R
1
BK
BK
R
3
Figure 14.
4
Figure 16.
a. Yes. Go to Step 7.
a. Yes. Clean/repair mounting bolts and mounting surface
or ground cable from transmission case to reverse motor
mounting bolt.
b. No. Replace circuit breaker.
b. No. Go to Step 9.
7. Vehicle Starter Test
1.
Perform voltage drop between battery positive and the high
current power from the vehicle starter.
2.
Is voltage drop greater than 1 V?
1157345
9. Reverse Motor Current Draw On Vehicle Test
1.
Perform reverse motor current draw test on vehicle. See
Reverse Motor Test.
2.
Are test results within range?
a. Yes. Go to Step 10.
R
BK
b. No. Go to Step 11.
10. Reverse Motor Test
2
1.
Perform reverse motor solenoid test. See Reverse Motor
Solenoid.
2.
Did reverse motor solenoid pass the test?
R
BK
1
R
BK
a. Yes. Replace reverse motor.
BK
b. No. Replace reverse motor solenoid.
3
4
Figure 15.
a. Yes. Repair/replace vehicle starter to battery positive
wire.
11. Reverse Motor Free Running Current Draw Test
1.
Perform reverse motor free running current draw bench
test. See Testing Reverse Motor on Bench.
2.
Are tests results within range?
a. Yes. Repair source of mechanical bind.
b. No. Repair/replace vehicle starter to circuit breaker wire.
b. No. Replace reverse motor.
8. Ground Circuit Test
1.
Perform voltage drop between battery negative and reverse
motor mounting bolts with reverse motor engaged.
10 / 23
REVERSE MOTOR RUNS ON
1. Reverse Solenoid Control Circuit Test
1.
Trip circuit breaker.
2.
Disconnect reverse motor solenoid [248] and inspect
connections.
3.
Reset circuit breaker.
4.
Turn IGN ON.
M1508
5.
Does reverse motor continue to run on?
5.
a. Yes, without electrical kit. Replace reverse motor
solenoid.
Is battery voltage present?
1158718
b. Yes, with electrical kit. Go to Step 5.
2
1
(+)
(–)
c. No. Go to Step 2.
2. RCM Solenoid Circuit Test
1.
Turn IGN OFF.
2.
Disconnect reverse control solenoid [246] and inspect
connections.
a. Yes. Repair short to voltage on (TN/R) wire.
3.
Turn IGN ON.
b. No. Replace RCM.
4.
With reverse drive button not pushed and using TEST
CONNECTOR KIT (PART NUMBER: HD-41404), test
voltage between [248] and ground.
5. Electrical Kit Test
1.
Disconnect [249A] and [249B].
5.
Is battery voltage present?
2.
Test for continuity reverse motor solenoid terminals [249A]
and [249B].
3.
Is continuity present?
Figure 18.
1229462
R
BK
1422360
(–)
BK
(+)
BK
R
Figure 17.
a. Yes. Go to Step 3.
b. No. Go to Step 4.
3. Reverse Motor Solenoid Control Circuit Test
1.
Turn IGN OFF.
2.
Disconnect reverse control solenoid [251] and inspect
connections.
Figure 19.
a. Yes. Replace reverse motor solenoid.
b. No. Replace electrical kit.
3.
Turn IGN ON.
4.
With reverse drive button not pushed, test voltage between
[248] and ground.
5.
Is battery voltage present?
1.
Reset 150 A reverse motor circuit breaker.
a. Yes. Repair short to voltage on (BK) wire.
2.
Verify reverse function.
b. No. Replace Reverse Control Module (RCM) solenoid.
3.
Is reverse motor working?
REVERSE MOTOR INOPERATIVE
1. Circuit Breaker Reset Test
a. Yes. Circuit breaker was reset.
4. RCM Solenoid Control Circuit Test
b. No. Go to Step 2.
1.
Turn IGN OFF.
2.
Disconnect RCM [245] and inspect connections.
2. Reverse Switch Function Test
3.
Turn IGN ON.
1.
4.
With the reverse drive button not pushed, test voltage
between [246B] terminal 1 and ground.
Verify conditions are correct to enable reverse. See
Reverse Motor System Diagnostics.
2.
Start engine.
3.
Activate reverse button on Right Hand Control Module
(RHCM).
M1508
11 / 23
4.
Does reverse indicator illuminate?
5. Ground Circuit Test
a. Yes. Solid "R". Go to Step 3.
1.
Turn IGN OFF.
b. Yes. Flashing "R". Go to Step 16.
2.
Test resistance between reverse motor mounting bolt [253]
and ground.
3.
Is resistance less than 0.5 Ω?
c. No. See Indicator Lamp Diagnostics.
3. RCM Circuit Test
a. Yes, without electrical kit. Go to Step 6.
NOTE
Raise the rear wheels off the ground by placing jack stands
under the rear axle before performing any diagnostic tests that
require pushing the reverse button.
b. Yes, with electrical kit. Go to Step 23.
c. No. Clean/repair mounting bolts and mounting surface.
6. Reverse Motor Solenoid Test
1.
With reverse drive button pressed and using TEST
CONNECTOR KIT (PART NUMBER: HD-41404), test
voltage between reverse motor solenoid [248] and ground.
2.
Is voltage greater than 10 V?
1.
Perform reverse motor solenoid test. See Reverse Motor
Testing.
2.
Did reverse motor solenoid pass test?
a. Yes. Replace reverse motor.
1229462
b. No. Replace reverse motor solenoid.
7. Reverse Motor Control Circuit Test
(+)
1.
Start engine.
2.
With reverse button pressed, test voltage between reverse
control solenoid [251A & B] and ground.
3.
Is voltage greater than 10 V at both terminals?
(–)
1229470
Figure 20.
a. Yes. Go to Step 4.
b. No. Go to Step 7.
(+)
(–)
4. Reverse Motor High Current Circuit Test
1.
With reverse button pressed, test voltage between reverse
motor solenoid [249B] and ground.
2.
Is voltage greater than 10 V?
Figure 22.
1229466
a. Yes. Repair open between [251B] and [248] (BK) wire.
b. No, only terminal [251A]. Go to Step 8.
c. No, neither terminal. Go to Step 12.
8. RCM Solenoid Control Circuit Test
(+)
(–)
1.
Turn IGN OFF.
2.
Disconnect [246] and inspect connections.
3.
Start engine.
4.
With reverse switch pressed, test voltage between [246B]
terminal 1 (TN/R) wire and ground.
Figure 21.
a. Yes. Go to Step 5.
b. No. Go to Step 13.
12 / 23
M1508
5.
Is voltage greater than 10 V?
4.
1158718
Is resistance less than 0.5 Ω?
1177617
2
1
(+)
(–)
4
3
2
1
8
7
6
5
2
(+)
Figure 23.
1
(–)
Figure 26.
a. Yes. Go to Step 9.
a. Yes. Replace RCM .
b. No. Go to Step 11.
b. No. Repair open in (TN/R) wire.
9. RCM Solenoid Ground Circuit Test
12. Circuit Breaker Supply Voltage Test
1.
Turn IGN OFF.
1.
Test voltage between circuit breaker [252A] and ground.
2.
Test resistance between [246B] terminal 2 and ground.
2.
Is voltage greater than 10 V?
3.
Is resistance less than 1 Ω?
1229474
1158740
2
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TSB/Document ID: M1508
Replacement Service Bulletin Number:
MFR Communication Date: 2026-01-30
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: UNKNOWN OR OTHER
MFR Component System:
MFR Component Subsystem:
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