Component Location Component
Connector Location Schematic Machine Connector Number Location Location CONN 1 J-18 9 CONN 2 J-17 9 CONN 3 L-17 A CONN 4 L-17 9 CONN 5 I-15 A CONN 6 Code L-15 4 CONN 7 B-14 A CONN 8 B-14,L-10 A CONN 9 C-14 A CONN 10 C-14 A CONN 11 C-14 A CONN 12 I-15 G CONN 13 K-14 25 CONN 14 K-14 25 CONN 15 Data Link L-15 4 CONN 16 C-13 C CONN 17 D-13,K-2 C CONN 18 J-13 3 CONN 19 J-13 3 CONN 20 D-11 3 CONN 21 D-11 3 CONN 22 B-10,K-2 C CONN 23 D-10 3 CONN 24 D-10 3 CONN 25 H-8 A CONN 29 F-7 B CONN 30 F-7 B CONN 31 F-7 B CONN 32 I-7 1 CONN 33 J-7 3 CONN 34 K-7 7 CONN 35 K-7 3 CONN 36 K-7 3 CONN 37 D-5,H-6 6 CONN 38 D-5,I-6 6 CONN 39 C-5,I-6 6 CONN 40 B-5 3 CONN 41 B-5 6 CONN 42 K-5 3 CONN 43 K-5 3 CONN 44 B-3 6 CONN 45 G-1 8 CONN 46 G-1 8 CONN 47 J-13 25 CONN 48 I-14 A CONN 49 H-14 A CONN 50 D-12 C The connectors shown in this chart are harness to harness and special use connectors. Connectors which join a harness to a component are generally located at or near the component. See the component location chart.
13 25
7
9
18 15 23 17 22 C 24 21 12 D B 3 11 5 27 2 8 6 G 19 14
16
10 E F 1
20 A
4
26
9
C
10 E B
D
19 18
A
26 F 1
7
21
27 3
G
25 20 16
13
11
6 24 4
5 12 14 8 17 22 2 15 23
E84058
Machine Harness Connector And Component Locations Component Identifiers (CID¹) For Shift Lever Control CID No. CID 168
Machine Location
Schematic Location
Alarm - Backup B-18 1 Alarm - Lightbar Action D-16, F-5 A Alarm - Stabilizer Leg I-14 B Alternator E-3 2 Battery 1 C-3 4 Battery 2 D-3 4 Breaker - Running Lamp F-10 A Coil - Thermostart E-3 5 Control - Powershift L-12 4 Control - Shuttle K-12 D Fuses E,F-10 D Fuses E,F-11 C Fuses E,F-14 C Gauge - AWS Position K-5 B Gauge - Converter Temperature A-15 A Gauge - Coolant Temperature A-16 A Gauge - Fuel Level B-17 A Gauge - Tachometer B-17 A Ground - Cab, Frame, Engine C-2 4 Ground - Engine G-3 6 Ground - Headliner C-11 C Ground - Plateform A-13 7 Ground - Steering Col D-10 3 Heater - Engine Block G-5 2 Horn - Forward B-3 8 Horn - Rear H-6 1 Lamp - Indicator L-5 B LED - Service L-14 A Meter - Service D-14 A Motor - Blower K-18 9 Motor - Fan Assembly F-17 3 Motor - Front Washer C-3 21 Motor - Front Wiper G-5 C Motor - Heater Blower E-17 A Motor - Rear Washer C-3 21 Motor - Rear Wiper E-17 10 Power Port D-14 A Relay - Accessory F-9 D Relay - Air Conditioner F-9 B Relay - Cab E-9 D Relay - Left Steer K-4 B Relay - Loader Lock J-9 A Relay - Main F-9 D Relay - Parking Brake K-15 A Relay - Power Seat D-17 F Relay - Ride Control G-12, B-6 E Relay - Right Steer K-4 B Relay - Shutoff K-4 B Relay - Stabilizer Leg I-14 E Relay - Start E-9 D Resistor I-9 3 Resistor - Air Conditioning K-18 A Resistor - Heater E-16 A Sender - Converter Temperature I-5 6 Sender - Coolant E-3 12 Sender - Fuel Level H-5, G-4 13 Sensor - Rear Steer Position J-9 7 Sensor - Return to Dig L-17 14 Sensor - Speed J-12 G Solenoid - Air Conditioner Clutch J-16 15 Solenoid - Aux. Detent A-5 16 Solenoid - Bucket Position A-4 16 Solenoid - Circle Steer L-9 7 Machine locations are repeated for components located close together A = Operator Compartment - Right Console B = Operator Compartment - Front Console C = Operator Compartment - Overhead Console D = Operator Compartment - Steering Column Top Panel E = Operator Compartment F = Inside Seat Assembly G = Under Cab Floorplate
Component
Schematic Location
Machine Location
H-5 F-3 J-12 I-5, F-4 F-3 J-12 J-12 A-18 I-7 L-9 L-9 J-12 H-9, E-5 I-7 L-9 L-9 B-18 D-3 K-16 E-6 C-6 L-5 K-8 H-15 E-12 J-12 I-12 C-4 H-4 H-4, F-3 D-6 B-15 H-5 E-12 F-6 A-16 C-6 D-14 J-7 E-5 D-5 K-1 L-1 L-1 K-1 J-11 B-8 F-12 H-8 K-8 D-12 J-16 L-16 H-12 B-7 I-15 D-15 J-18 E-5 C-12 D-4 D-6
12 17 G G G G G 1 18 7 7 G G 19 7 7 1 11 A B B B 20 A C E E 21 12 12 B A 22 C B B B D B B E C C C C C A C A B E 23 13 E E 26 A 9 B C E B
Solenoid - Cold Start Advance Solenoid - Engine Shutdown Solenoid - First and Second Gear Solenoid - Front Drive Solenoid - FWD-REV Valve Group Solenoid - Group A Solenoid - Group B Solenoid - Hydraulic Shutoff Solenoid - Left Loader Lock Solenoid - Left Steer Solenoid - Lock Solenoid - Reverse Solenoid - Ride Control Solenoid - Right Loader Lock Solenoid - Right Steer Solenoid - Shutoff Solenoid - Side Shift Lock Starter Switch - Air Conditioner Blower Switch - All Wheel Drive Switch - Aux. Coupler Switch - AWS Mode Select Switch - AWS Pressure Switch - Backhoe Shutoff Switch - Beacon Switch - Brake A Switch - Brake B Switch - Brake Fluid Level Switch - Cold Start Temperature Switch - Coolant Switch - Coupler Switch - Coupler Detent Switch - Engine Oil Pressure Switch - Front Wiper Switch - Hazard Switch - Heater Switch - Horn Switch - Key Start Switch - Loader Float Switch - Loader Rod End Pressure Switch - Loader Xmsn Neutralizer Switch - OROPS Beacon Switch - OROPS Front Floods Aux Switch - OROPS Front Flood Switch - OROPS Rear Floods Switch - Overdrive Disable Switch - Parking Brake Switch - Rear Floods Switch - Rear Horn Switch - Rear Steer Switch - Rear Wiper Switch - Refrigerant Switch - Return To Dig Switch - Ride Control Switch - Ride Control Switch - Stabilizer Leg Switch - Start Aid Switch - Thermostat Switch - Turn Signal Switch - Washers Switch - Xmsn Neutralizer Switch - Xmsn Neutralizer Lock
RENR2855-01 March 1999
416C, 426C, and 436C Backhoe Loader Electrical System 416C: 4ZN16044-UP 1WR8117-UP
426C: 6XN3616-UP 1CR864-UP 1MR956-UP 1YR1517-UP
436C: 8TN925-UP 2AR1604-UP 1FR1416-UP 1PR1599-UP
Description Electrical System
CID 668 Transmission Shift Lever ¹ The CID is a diagnostic code that indicates which component is faulty.
Failure Mode Identifiers (FMI) FMI No. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Failure Description Data valid but above normal operational range. Data valid but below normal operational range. Data erratic, intermittent, or incorrect. Voltage above normal or shorted high. Voltage below normal or shorted low. Current below normal or open circuit. Current above normal or grounded circuit. Mechanical system not responding properly. Abnormal frequency, pulse width, or period. Abnormal update. Abnormal rate of change. Failure mode not identifiable. Bad device or component. Out of calibration. Parameter failures. Parameter failures. Parameter not available. Module not responding. Sensor supply fault. Condition not met. Parameter failures.
The FMI is a diagnostic code that indicates what type of failure has occurred.
Diagnostic Code Conversion Flashed CID-FMI 11 No Active Faults No Inactive Faults 12 13 -14 -15 -16 -17 -18 -31 641-05 32 642-05 33 643-05 34 644-05 35 645-05 36 646-05 37 683-05 41 641-06 42 642-06 43 643-06 44 644-06 45 645-06 46 646-06 47 683-06 51 641-03 52 642-03 53 643-03 54 644-03 55 645-03 56 646-03 57 683-03 69 668-02 71 168-00 72 168-01 73 650-02
Description Not Applicable Not Applicable 416C 426C 428C 436C 438C BHL Solenoid 1 Open Circuit Solenoid 2 Open Circuit Solenoid 3 Open Circuit Solenoid 4 Open Circuit Solenoid 5 Open Circuit Solenoid 6 Open Circuit Parking Brake Alarm Relay Open Circuit Solenoid 1 Short to Ground Solenoid 2 Short to Ground Solenoid 3 Short to Ground Solenoid 4 Short to Ground Solenoid 5 Short to Ground Solenoid 6 Short to Ground Parking Brake Alarm Relay Short to Ground Solenoid 1 Short to + Battery Solenoid 2 Short to + Battery Solenoid 3 Short to + Battery Solenoid 4 Short to + Battery Solenoid 5 Short to + Battery Solenoid 6 Short to + Battery Parking Brake Alarm Relay Short to Battery Invalid Shift Lever Input System Voltage Above Normal System Voltage Below Normal Invalid Harness Code
101 102 104 105 110 111 112 113 115 116 117 118 119 121 122 123 124 128 130 136 140 143 144 157 161 170 194 197 198 200 201 202 217 218 265 270 276 277 278 279 280 281 303 304 306 307 308 309 310 321 322 334 367 405 406 419 429 441 443 447 450 483 500 501 502 503 504 505 506 507 508 509 511 512 513 515 516 517 520 521
Wire Color
Description
Power Distribution Circuits RD Bat (+) RD Running Lamp Pwr YL Acc Rly Output RD Key Sw Pwr RD Horn Pwr YL Acc Bat Pwr PU Main Power Rly Output OR Opr Mon Panel Pwr RD Acc Socket Pwr BR Std Rear Flood Pwr YL Aux Rear Flood Pwr GY Front Wiper Pwr PK Rear Wiper Pwr YL Back Alarm Pwr BU Heater Pwr WH XMSN Ctrl Pwr GN A/C Pwr PK Bucket Position Pwr GN Radio Pwr GN Suppl Steer Pwr BU Blower Pwr BR AWD Pwr GN Beacon Pwr YL Aux Front Flood Pwr RD Flasher Pwr RD Radio Memory Pwr GN Cab Bat Pwr GN Cab Relay Output PK A/C Relay Output Ground Circuits BK Main Chassis BK Operator Monitor return BK XMSN Ctrl Gnd BK Start relay return BK Drop valve relay return BK Loader Lock Gnd BK Loader Lock Gnd BK Pshift Ctrl Harn Code 0 BK Pshift Ctrl Harn Code 1 BK Pshift Ctrl Harn Code 2 BK Pshift Ctrl Harn Code 3 BK Pshift Ctrl Harn Code 4 BK Pshift Ctrl Harn Code 5 Basic Machine Circuits BR Key SW ACC Position WH Start Relay Output GN Starter Relay Coil OR Key Sw Start Position YL Key Sw Run Position GY Alternator Regulator Term. PU Start Aid Sol BR Backup Alarm GY Forward Horn BU Cold Start Adv Sol BU Rear Horn Monitoring Circuits GY Opr Mon Oil Press. (Low Setting) PU Opr Mon Coolant Temp YL Opr Mon Parking Brake YL AWS Position Gage OR Eng Coolant Temp Gage YL Converter Temp Gage PK Fuel Level Gage YL Tach Sender (+) BR Opr Mon Brake Fluid Level Accessory Circuits BR Wiper - Front (Park) GN Wiper - Front (Low) OR Wiper - Front (HI) BR Wiper - Rear (Park) YL Wiper - Rear (Low) BU Wiper - Rear (HI) PU Washer - Front WH Washer - Rear PU Radio Speaker - Left WH Radio Speaker - Left (Common) BR Radio Speaker - Right GN Radio Speaker - Right (Common) OR A/C Compressor/Refrigerant Pressure SW GY Blower Motor (HI) GN Blower Motor (Medium) BU Blower Motor (Low) WH Opr A/C SW To Thermostat/Fuse YL A/C SW To Refrigerant SW
Wire Number 522 536 537 552 568 571 578 619 C558 C559 C593 C594 C595 602 603 604 605 606 607 608 610 611 614 617 618 620 627 630 634 710 752 754 755 762 766 779 C720 E701 E702 E764 F738 F748 F765 G726 G742 G743 G789 G795 G796 G797 G798 H767 H768 H769 H770 H771 H772 F871 F872 F873 F874 F877 922 923 944 945 975 976 991 C920 C993 L998 L999 M913 M968 N904 N905 N907 P909 R977 R978
Wire Color
Description
Accessory Circuits (cont'd) WH A/C Clutch To Thermostat SW WH Hazard SW To Turn SW GN Turn Signal SW To Flasher WH Four Wheel Drive Sol GN Park Brake Alarm Sig OR Powershift - Ride Control Relay BU Washer - Aux GN Headlamp low YL Front Wiper Switch Jumper YL Rear Wiper Switch Jumper OR Power Seat Relay Control YL Power Seat Motor GN Power Seat Heater Lighting Circuits RD Dome Lamp Pwr PK Rotary Beacon OR Stop Lamp YL Turn Lamp - Left GY Turn Lamp - Right PK Flood Lamp - Front GN Flood Lamp - Rear OR Head Lamp Basic PU Head Lamp Hi PU Park/Tail/Dash/Lamp BR Tail/Position Lamp - Left YL Tail/Position Lamp - Right WH Flood Lamp - Front (Attach) YL Fog Lamp GY Flood Lamp Rear (Attach) WH Head Lamp SW To Work/Head Lamp Jumper Control Circuits GN XMSN Speed Pickup Signal YL XMSN Shift Sol 1st and 2nd Gear BU XMSN Shift Sol 3rd Gear OR XMSN Shift Sol 4th Gear YL Bucket Positioner Sol GN XMSN Disconnect SW WH Coupler Engage Sol BU XMSN Neutral Lock Sig PK Ride Control OR Ride Control SW OR AWS Circle Steer/Lock Sol WH Loader Rod End Pressure SW WH Powershift - Ride Control Manual BR Park Brake SW To Relay GY AWS Shut Off Sol GN AWS Relay Coil to Diode OR AWS Relay Coil to Diode BR AWS Mode SW To Press SW OR AWS Mode SW To Rear Steer SW Pwr YL AWS Mode SW To Rear Steer SW Gnd BU AWS Left Steer Relay Gnd PU AWS Right Steer Relay Gnd BR AWS Circle Steer/Lock Sol Gnd BR AWS Left Steer Sol Gnd BR AWS Right Steer Sol Gnd BR AWS Shut Off Sol Gnd BR Side Shift Lock Sol YL Backhoe Shutoff Sol PU AWS Left Steer Sol BU AWS Right Steer Sol YL Relay Contact To Diode As PK AWS Left Steer Relay Ctrl WH AWS Right Steer Relay Ctrl BR FWD Solenoid Rtn GY REV Sol Rtn OR Data Link + (CAT) BR Data Link - (CAT) WH Powershift - Sol Return OR Ride Control Relay WH XMSN Neut SW GY Diagnostic Indicator - Powershift WH Shuttle Ctrl Pwr OR Aux Hyd Sol B GN Aux Hyd Sol C PU Diode to AWS Indicator Lamp BU Coupler Switch Interconnect PU Forward High Solenoid OR Forward Low Solenoid GN Reverse Low Solenoid PK Autoshift Disable BU Stabilizer leg sw YL Shuttle control jumper
Harness And Wire Electrical Schematic Symbols Resistor, Sender, and Solenoid Specifications Part No. 3E-1908 3E-6184 3E-8620
3E-8622 4W-9972
Component Solenoid - A/C Clutch Resistor Solenoid - Aux Dent Bucket Pos Solenoid - Sideshift Lock Shutoff Valve Group A Sender - Converter Temp
17.6 ± 0.6 100 ± 5% 32.1
8C-5541
Solenoid - LH/RH Loader Lock
113-5320 121-4036 126-3707 128-2875
Solenoid - Right/Left Steer Solenoid - Front Drive Solenoid - Ride Control Sender - Fuel Level Full: Empty: Resistor - A/C Heater Solenoid - Hydraulic
54°C (130°F) - 560 to 716 110°C (230°F) - 72 to 82 54°C (130°F) - 560 to 716 110°C (230°F) - 72 to 82 54°C (130°F) - 560 to 716 110°C (230°F) - 72 to 82 8.5 10.5 2.8 ± 0.3 240-260 27.5 - 39.5 Overall 1.0 ± 0.1 Tap 0.5 ± 0.05
Pressure Symbol
Temperature Symbol
Level Symbol
Flow Symbol
Normally open switch that will close with an increase of a specific condition (temp-press-etc.).
2
Normally open switch that is closed due to an applied condition, and will open again with a specific decrease in that condition.
Function
Actuate
Deactuate
Contact Position
107.2 ± 2.8ºC 93ºC MIN Normally (225 ± 5ºF) (196ºF MIN) Open .25Nm to .43Nm -Normally 9X-5446 Thermostat (.19 lb ft to .32 lb ft) -Open 275 to 1750 kpa¹ -Normally ² 114-5333 Refrigerant Pressure (40 to 255 psi) -Open 551 kPa 344 kPa ± 20 kPa A-C Normally Closed 128-5091 AWS Pressure (36.3 psi) (49.9 psi ± 2.9 psi) A-B Normally Open ¹ A hysteresis band exists: with increasing pressure the closed condition can be maintained up to 2800 kpa (405 psi), with decreasing pressure the closed condition can be maintained down to 170 kpa (25 psi). Engine Coolant Temperature
² Contact position at the contacts of the harness connector.
Normally closed switch that is open due to an applied condition, and will close again with a specific decrease in that condition.
Title
Form Number SENR1274
Starter: 143-0539
SENR3828
9X-1123
1
Harness identification code This example indicates wire 32 in harness "L'.
2
200-L32 BK-14
Socket
Single Wire Connector * Harness identification letter(s) and a serializing code. The "C" stands for connector and the number indicates which connector in the harness.
Circuit Number Identification
Wire Color
Wire Gauge
Electrical Schematic Symbols And Definitions FUSE - A component in an electrical circuit that will open the circuit if too much current flows through it. REED SWITCH - A switch whose contacts are controlled by a magnet. A magnet closes the contacts of a normally open reed switch; it opens the contacts of a normally closed reed switch.
No circle indicates that the wire cannot be disconnected from the component.
This indicates that the component does not have a wire connected to ground. It is grounded by being fastened to the machine.
Power Shift Transmission Control
Pin
L-C12* 3E-5179
AG-C4* 111-7898 325-A135 PK-14
The circle indicates that the component has screw terminals and a wire can be disconnected from it.
This indicates that the component has a wire connected to it that is connected to ground.
Related Electrical Service Manuals
Wire, Cable, or Harness Assembly Identification
* C-C4* AG-C3 130-6795 130-6795
8.15 ± 0.6
Off Machine Switch Specification 6T-2665
Component Part Number
Pin or Socket Number
Normally closed switch that will open with an increase of a specific condition.
Part No.
Receptacle
Plug
T
Typical representation of a Sure-Seal connector. The plug and receptacle contain both pins and sockets.
Typical representation of a Deutsch connector. The plug contains all sockets and the receptacle contains all pins.
L-C12 * 3E-5179
AG-C4 * 111-7898 1
Sender - Coolant Temp
138-1976 ¹ At room temperature.
Electrical Schematic Symbols And Definitions
1 2
1 2
Part Numbers For Connector Assembly
10.5
7N-8532
134-2885
Resistance (Ohms)¹
325-L25 PK-14
Wire Number
Printed in U.S.A.
© 1999 Caterpillar All Rights Reserved
Wire Description
T
SENDER - A component that is used with a temperature or pressure gauge. The sender measures the temperature or pressure. Its resistance changes to give an indication to the gauge of the temperature or pressure. RELAY (Magnetic Switch) - A relay is an electrical component that is activated by electricity. It has a coil that makes an electromagnet when current flows through it. The electromagnet can open or close the switch part of the relay. CIRCUIT BREAKER (C/B) - A component in an electrical circuit that will open the circuit if too much current flows through it. This does not destroy the circuit breaker and it can be reset to become part of the circuit again. SOLENOID - A solenoid is an electrical component that is activated by electricity. It has a coil that makes an electromagnet when current flows through it. The electromagnet can open or close a valve or move a piece of metal that can do work.