552034 Service Bulletin/Repair Instructions

LVER

LVER

LVER
6

6

6

6

6

6

6

6

6

6

6

6
CONDUCTO

CONDUCTO

CONDUCTO

CONDUCTO

CONDUCTO

CONDUCTO

CONDUCTO

CONDUCTO

CONDUCTO

CONDUCTO

CONDUCTO

CONDUCTO
1 of 7
EXTERIOR CABLE COAXIAL CIRCUIT

EXTERIOR CABLE COAXIAL CIRCUIT
HEAT

HEAT

HEAT

HEAT
TRIGGER

TRIGGER

TRIGGER

TRIGGER
1:05 PM
D02020810 REV_G 37RB CHASSIS HARNESS DLC

W I RE #
STARTS
CAVI TY
GAUGE
COLOR
STRI P E
EN DS
CAVI TY

N/A

N/A

N/A

N/A
TO USB PORTS IN LIVING ROOM SLIDEOUT OVERHEAD CABINET

TO USB PORTS IN THE BEDROOM OVERHEAD CABINET, HIS AND HERS

TO USB PORTS AT THE BEDROOM ENTERTAINMENT CENTER

TO USB PORTS IN THE FRONT BATHROOM VANITY
AQP

G37

G37

G37

50

51

52

53

54

55

56

57

Z13

Z13

Z13

Z13

Z12

Z12

Z12

Z12

Z23

Z23

Z22

Z22
22

43A

29B

29B

29B

29B

29B

29B

29B

29B

29B

29B

43B

CZ2

CZ3

14A

43B

CZ2

CZ3

14A

43B

CZ4

43B

CZ4
5

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A
10

10

16

16

16

16

16

16

16

16

16

16

14

14

14

14

14

14

14

14

14

14

14

14
BLUE

WHITE

WHITE

WHITE

WHITE

GREEN

BROWN

PURPLE

ORANGE

YELLOW

BLUE

LIGHT BLUE

RED

RED

RED

RED

RED

RED

RED

RED

PINK

PINK

PINK

PINK
N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

BLACK

BLACK

BLACK

BLACK

N/A

N/A

BLACK

BLACK
43A

65

19B

SPLICE

43B

43B

43B

43B

43B

43B

43B

43B

CZ1

SPLICE

SPLICE

SPLICE

CZ1

SPLICE

SPLICE

SPLICE

CZ5

SPLICE

CZ5

SPLICE
N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A
AQUAHOT POWER FROM THE ELECTRICAL COMP.

AQUAHOT GROUND

AQUAHOT GROUND

AQUAHOT GROUND

AQUAHOT SWITCH WIRING TOWER TO AQUAHOT

AQUAHOT SWITCH WIRING TOWER TO AQUAHOT

AQUAHOT SWITCH WIRING TOWER TO AQUAHOT

AQUAHOT SWITCH WIRING TOWER TO AQUAHOT

AQUAHOT SWITCH WIRING TOWER TO AQUAHOT

AQUAHOT SWITCH WIRING TOWER TO AQUAHOT

AQUAHOT SWITCH WIRING TOWER TO AQUAHOT

AQUAHOT SWITCH WIRING TOWER TO AQUAHOT

AQUAHOT ZONE 1 EXCHANGER FAN + (ZONE 1 COZY POWER)

AQUAHOT ZONE 1 EXCHANGER FAN + (ZONE 1 COZY POWER)

AQUAHOT ZONE 1 EXCHANGER FAN + (ZONE 1 COZY POWER)

AQUAHOT ZONE 1 EXCHANGER FAN + (ZONE 1 COZY POWER)

AQUAHOT ZONE 1 EXCHANGER FAN - (ZONE 1 COZY GROUND)

AQUAHOT ZONE 1 EXCHANGER FAN - (ZONE 1 COZY GROUND)

AQUAHOT ZONE 1 EXCHANGER FAN - (ZONE 1 COZY GROUND)

AQUAHOT ZONE 1 EXCHANGER FAN - (ZONE 1 COZY GROUND)

AQUAHOT ZONE 2 EXCHANGER FAN + (ZONE 2 COZY POWER)

AQUAHOT ZONE 2 EXCHANGER FAN + (ZONE 2 COZY POWER)

AQUAHOT ZONE 2 EXCHANGER FAN - (ZONE 2 COZY GROUND)

AQUAHOT ZONE 2 EXCHANGER FAN - (ZONE 2 COZY GROUND)
TRAILER BRAKE CONTROLLER OUTPUT

TRAILER BRAKE CONTROLLER POWER

BRAKE PRESSURE SWITCH

BRAKE PRESSURE SWITCH

TRAILER BRAKE CONTROLLER GROUND
BCO

BCP

BCP
N/A

N/A

N/A

N/A

N/A
12

12

12

14

12
BLUE

ORANGE

ORANGE

RED

WHITE
N/A

BLUE

BLUE

WHT

N/A
59

21

SPLICE

25

19
2

1

N/A

N/A

N/A
BRAKE CONTROLLER OUTPUT DASH CONTROLLER TO 7 WAY

ELECTRICAL COMPARTMENT CHASSIS POWER DISTRIBUTION
G20
25

25

25B

25B

25
PARK BRAKE SIGNAL
BCR
46M
3
18
BLACK
N/A
27
9
PARK BRAKE INPUT TO CAB HARNESS TO BRAKE SWITCH IN AIR LINE
BED OH LIGHTS (BEDROOM SLIDEOUT)

GROUND BED OH LIGHTS (BEDROOM SLIDEOU
BOH

G16
46C

4
1

N/A
16

16
BROWN

WHITE
BLUE

N/A
4

19
N/A

N/A
BEDROOM OVERHEAD LIGHTS IN SLIDEOUT

GROUND BEDROOM OVERHEAD LIGHTS IN SLIDEOUT
FRONT CEILING LIGHTS (PWM 1)

GROUND FRONT CEILING LIGHTS (PWM 1)
FOL

GFOL
46A

46A
1

5
16

16
GREEN

WHITE
BLACK

GREEN
66A

66A
9

10
TO ROOF HARNESS FRONT CONNECTION

TO ROOF HARNESS FRONT CONNECTION
LIVING ROOM CEILING LIGHTS (PWM 2)

GROUND LIVING ROOM CEILING LIGHTS (PWM
LVR

GLVR
46A

46A
2

6
16

16
YELLOW

WHITE
BROWN

YELLOW
66A

66A
1

2
TO ROOF HARNESS REAR CONNECTION

TO ROOF HARNESS REAR CONNECTION
KITCHEN CEILING LIGHTS (PWM 3)

GROUND KITCHEN CEILING LIGHTS (PWM 3)
KCS

GKCS
46A

46A
3

7
16

16
PINK

WHITE
BLACK

PINK
66A

66A
11

12
TO ROOF HARNESS FRONT CONNECTION

TO ROOF HARNESS FRONT CONNECTION
BEDROOM CEILING LIGHTS (PWM 4)

GROUND BEDROOM CEILING LIGHTS (PWM 4)
BRL

GBRL
46A

46A
4

8
16

16
GRAY

WHITE
BLACK

GRAY
66A

66A
3

4
TO ROOF HARNESS REAR CONNECTION

TO ROOF HARNESS REAR CONNECTION
REAR CEILIING LIGHTS (PWM 5)

GROUND REAR CEILING LIGHTS (PWM 5)
HLS

GHLS
46B

46B
1

3
16

16
RED

WHITE
BLACK

RED
66A

66A
5

6
TO ROOF HARNESS FRONT CONNECTION

TO ROOF HARNESS FRONT CONNECTION
RLS
46B
2
16
YELLOW
BLACK
66A
7
TO ROOF HARNESS FRONT CONNECTION
CI RCUI T DESCRI P TI ON (P RI N T)
USB

USB

USB

USB
CHARGING

CHARGING

CHARGING

CHARGING
AQUAHOT

AQUAHOT

AQUAHOT

AQUAHOT

AQUAHOT

AQUAHOT

AQUAHOT

AQUAHOT

AQUAHOT

AQUAHOT

AQUAHOT

AQUAHOT

AQUAHOT

123 4 5...18

Bestseller No. 1

ANCEL AD310 Classic Enhanced Universal OBD II Scanner Car Engine Fault Code Reader CAN Diagnostic Scan Tool, Read and Clear Error Codes for 1996 or Newer OBD2 Protocol Vehicle (Black)

CEL Doctor: The ANCEL AD310 is one of the best-selling OBD II scanners on the market and is recommended by Scotty Kilmer, a YouTuber and auto mechanic. It can easily determine the cause of the check engine light coming on. After repairing the vehicle's problems, it can quickly read and clear diagnostic trouble codes of emission system, read live data & hard memory data, view freeze frame, I/M monitor readiness and collect vehicle information.
Sturdy and Compact: Equipped with a 2.5 foot cable made of very thick, flexible insulation. It is important to have a sturdy scanner as it can easily fall to the ground when working in a car. The AD310 OBD2 scanner is a well-constructed mechanic tool with a sleek design. It weighs 12 ounces and measures 8.9 x 6.9 x 1.4 inches. Thanks to its compact design and light weight, transporting the device is not a problem. The buttons are clearly labelled and the screen is large and displays results clearly.
Accurate Fast and Easy to Use: The AD310 scanner can help you or your mechanic understand if your car is in good condition, provides exceptionally accurate and fast results, reads and clears engine trouble emission codes in seconds after you fixed the problem. This device will let you know immediately and fix the problem right away without any car knowledge. No need for batteries or a charger, get power directly from the OBDII Data Link Connector in your vehicle.
OBDII Protocols and Car Compatibility: Many cheap scan tools do not really support all OBD2 protocols. AD310 scanner as it can support all OBDII protocols such as KWP2000, J1850 VPW, ISO9141, J1850 PWM and CAN. This device also has extensive vehicle compatibility with 1996 US-based, 2000 EU-based and Asian cars, light trucks, SUVs, as well as newer OBD2 and CAN vehicles both domestic and foreign. Pls confirm with our customer service whether it is compatible with your vehicle before purchasing.
Home Necessity and Worthy to Own: This is an excellent code reader to travel or home with as it weighs less and it is compact in design. You can easily slide it in your backpack as you head to the garage, or put it on the dashboard, this will be a great fit for you. The AD310 is not only portable, but also accurate and fast in performance. Moreover, it covers various car brands and is suitable for people who just need a code reader to check their car.

Bestseller No. 2

MOTOPOWER MP69033 Car OBD2 Scanner Code Reader Engine Fault Scanner CAN Diagnostic Scan Tool for All OBD II Protocol Cars Since 1996, Yellow

Multi-Functions - Practical Multi-Functions OBD2 code reader features built-in OBD2 DTC lookup library, which help you to determine the cause of the engine light, read code, erase code, view freeze frame, I/M ready, vehicle information, data flow, real-time curve, get vehicle speed information, calculate load value, engine coolant temperature, get engine speed.
Wide Capability - Supports 9 protocols compatible with most 1996 US-Based, 2000 EU-Based and Asian cars, and newer OBD II & CAN domestic or import vehicles. Supports 6 languages - English,German, Dutch, Spanish, French, Italian.
2.8" LCD Display - Designed with a clear display 2.8" Large LCD screen - white backlight and contrast adjustment. No need any battery or charger, OBD reader gets the power directly from your vehicle through the OBDII Data Link Connector.
Compact Design - Car diagnostic scanner is equipped with a 2.5 feet long cable and made of a very thick flexible insulator.There are 6 buttons on OBD2 Scanner:scroll up/down,enter/exit and buttons that quick query VIN vehicle number& the DTC fault code.
ABS / Airbag codes NOT Supported - It is able to read and clear check engine information which is part of OBDII system, but it cannot work with non-OBDII systems, including ABS / Airbag / Oil Service Light, etc.

Bestseller No. 3

FOXWELL NT301 OBD2 Scanner Live Data Professional Mechanic OBDII Diagnostic Code Reader Tool for Check Engine Light

【Your Personal CEL Doctor – Read & Clear Engine Codes】The NT301 OBD2 scanner lets you read diagnostic trouble codes (DTCs), check em-issions readiness, turn off your Check Engine Light (CEL) or MIL, reset monitors, and view live data streams. It retrieves your vehicle's VIN instantly. Like all standard OBD2 scanners, it clears codes only after repairs are completed—if the issue persists, the code will return. Designed for DIYers who want to understand what’s really going on under the hood.
【Easy Code Reading – Just Plug & Play】Simply plug into the OBD2 port, turn the ignition to “ON” (engine off), and select the correct menu: Select OBDII-> Wait for seconds-> Select Read codes. For accurate results, ensure your vehicle is compatible and the OBD2 port is free from damage or wiring issues. No batteries needed— powered directly by your car.
【Live Data Graphing & Accuracy for Most OBD2 Vehicles】View and log live sensor data in graph form—monitor oxygen sensors, fuel trims, coolant temp, RPM, and more. Spot trends and suspicious values in real time. Compatible with most 1996+ gasoline cars, light trucks, and SUVs sold in the U.S., as well as many 2000+ European and Asian models. Also works on 12V diesel vehicles equipped with OBD2.
【S-mog Check Helper – Know Your Readiness Status at a Glance】With dedicated I/M readiness hotkeys and a simple Red-Yellow-Green LED indicator, you’ll instantly know if your vehicle is ready for em-issions testing. Built-in speaker provides audio feedback. No guesswork—just confidence before you head to the test center.
【A Must-Have Tool for Every Home Mechanic】Compact, rugged, and ready to use right out of the box. The 2.8” color screen is easy to read, even in daylight. No charging or setup required—just plug into the 16-pin DLC and start diagnosing. Recommended by professional mechanics on YouTube and trusted by DIYers worldwide.

Last update on 2026-03-20 / Affiliate links / Images from Amazon Product Advertising API

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