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RED ICON

YELLOW ICON

RED ICON

YELLOW ICON

YELLOW ICON

RED ICON

YELLOW ICON

RED ICON

LCD

8

10

1

1

CONNECTOR J2

CONNECTOR J1

5.5

53.7

46.7

50.0

100.0

L1

L2

L3

L4

L5

L6

L7

L8

PUSHBUTTONS

(IF SO EQUIPPED)

PUSHBUTTONS

(IF SO EQUIPPED)

L1

L2

L3

L4

L5

L6

L7

L8

NOTES:
   1) CASE MATERIAL: ABS/PC BLEND, BLACK
   2) LENS MATERIAL: POLYCARBONATE
   3) PANEL CUTOUT SIZE: 45 +.6/-.0  X 92 +.8/-.0
   4) ALL SENDER CHARACTERISTICS TO BE DETERMINED

MOLEX MATING CONNECTORS

J1

J2

CONNECTOR
PIN

MOLEX #39-01-2105

MOLEX #39-00-0039

MOLEX #39-01-2085

AMP #1-794772-0

AMP #794758-1

AMP #784772-8

WIRE SEAL

GASKET

AMP MATING CONNECTORS

J1

J2

AMP #794821-1

AMP #770904-1

AMP #794781-1

L1

L2

L3

L4

L5

L6

L7

L8

2.2 Typical Wiring Diagrams

Information is for standard design units only.
Customers should review specific diagrams for custom units.

2.3 Mounting/Dimension Drawing

AUTO-RANGE SWITCH

OPEN = 24V OR 48V

CLOSED = 12V OR 36V

AUTO-RANGE SWITCH

OPEN = 24V OR 48V

CLOSED = 12V OR 36V

WIRING DIAGRAM

10

5

2 3 4

1

9

8

7

6

5 6 7 8

1

4

3

2

-

+

J2

J1

TYPICAL WIRING DIAGRAM FOR BATTERY DISCHARGE 

INDICATOR

LOAD

*

LOAD

*

J1

J2

+

-

2 3 4

1

8

7

6

5

6 7 8 9

1

4

3

2

5

10

WIRING DIAGRAM

MOLEX CONNECTOR

AMP CONNECTOR

AMP CONNECTOR

MOLEX CONNECTOR

WIRING DIAGRAM

10

5

2 3 4

1

9

8

7

6

5 6 7 8

1

4

3

2

-

+

J2

J1

TYPICAL WIRING DIAGRAM FOR RESISTANCE BASED 

SENDERS

LOAD

*

LOAD

*

ICON 5

SENDER 2

J1

J2

DC PWR

SUPPLY

+

-

2 3 4

1

8

7

6

5

6 7 8 9

1

4

3

2

5

10

V+

V-

WIRING DIAGRAM

ICON 7

ICON 8

ICON 6

SENDER 1

SETUP

ENABLE

ICON 5

DC PWR

SUPPLY

V+

V-

ICON 7

ICON 8

ICON 6

KEYSWITCH

HOUR METER

ENABLE

SETUP

ENABLE

KEYSWITCH

HOUR METER

ENABLE

SETUP

ENABLE

KEYSWITCH

HOUR METER

ENABLE

ICON 5

DC PWR

SUPPLY

V+

V-

ICON 7

ICON 8

ICON 6

WIRING DIAGRAM

10

5

2 3 4

1

9

8

7

6

5 6 7 8

1

4

3

2

-

+

J2

J1

TYPICAL WIRING DIAGRAM FOR VOLTMETER

LOAD

*

LOAD

*

J1

J2

+

-

2 3 4

1

8

7

6

5

6 7 8 9

1

4

3

2

5

10

WIRING DIAGRAM

MOLEX CONNECTOR

AMP CONNECTOR

ICON 5

DC PWR

SUPPLY

V+

V-

ICON 7

ICON 8

ICON 6

ICON 5

DC PWR

SUPPLY

V+

V-

ICON 7

ICON 8

ICON 6

ICON 5

SENDER 2

DC PWR

SUPPLY

V+

V-

ICON 7

ICON 8

ICON 6

SENDER 1

SETUP

ENABLE

KEYSWITCH

HOUR METER

ENABLE

SETUP

ENABLE

KEYSWITCH

HOUR METER

ENABLE

SETUP

ENABLE

KEYSWITCH

HOUR METER

ENABLE

PIN 2= 0.5A FET

PIN 6= 0.5A FET

PIN 2= 0.5A FET

PIN 6= 0.5A FET

PIN 2= 0.5A FET

PIN 6= 0.5A FET

Resistive based sender input (i.e. temp, fuel and pressure).

BDI (with auto-range switch)

Voltmeter

Molex

AMP

5.0 Maintenance

The enGage

® 

III 3000 Series is not serviceable. 

Safety Instructions

• This instrument was manufactured and tested according to the applicable technical standards. It complies with all the safety 

regulations as shipped from the factory.

• Installation and startup must be performed by skilled personnel.

• Failure to install and operate the unit in accordance with these instructions may result in damage or injury.

• If safe operation of the instrument can no longer be ensured, stop and secure it against accidental operation.

• If instrument failure or malfunction may cause personal injury or material damage, use additional safety measures such as limit 

switches, guards, etc.

• Read the Operating Instructions carefully before startup.

• Note the safety instructions marked with this warning symbol        in this manual.

Warranty

Curtis Instruments’ products and/or components are guaranteed against defects in workmanship and material for a period of two 
years, or as defined in the individual product literature, from date of shipment from our factory, when applied in a proper application 
within specified ratings. This guarantee is limited to repair or replacement F.O.B. our factory. There is no further warranty or implied 
representation, guarantee, promise or agreement as to any Curtis Instruments product and/or component. Curtis Instruments, Inc., 
cannot assume responsibility or accept invoices for unauthorized repairs to its products and/or components, even though defective. 
In no case will Curtis Instruments’ responsibility extend to products, components or equipment not of its manufacture. Under no 
circumstances shall Curtis Instruments, Inc., be liable for any special or consequential damages or loss of profits or other damages. 
Returned goods will not be accepted unless identified by a Curtis Return Material Authorization (RMA).

All specifications are subject to change without notice.

AUTO-RANGE SWITCH

OPEN = 24V OR 48V

CLOSED = 12V OR 36V

AUTO-RANGE SWITCH

OPEN = 24V OR 48V

CLOSED = 12V OR 36V

WIRING DIAGRAM

10

5

2 3 4

1

9

8

7

6

5 6 7 8

1

4

3

2

-

+

J2

J1

TYPICAL WIRING DIAGRAM FOR BATTERY DISCHARGE 

INDICATOR

LOAD

*

LOAD

*

J1

J2

+

-

2 3 4

1

8

7

6

5

6 7 8 9

1

4

3

2

5

10

WIRING DIAGRAM

MOLEX CONNECTOR

AMP CONNECTOR

AMP CONNECTOR

MOLEX CONNECTOR

WIRING DIAGRAM

10

5

2 3 4

1

9

8

7

6

5 6 7 8

1

4

3

2

-

+

J2

J1

TYPICAL WIRING DIAGRAM FOR RESISTANCE BASED 

SENDERS

LOAD

*

LOAD

*

ICON 5

SENDER 2

J1

J2

DC PWR

SUPPLY

+

-

2 3 4

1

8

7

6

5

6 7 8 9

1

4

3

2

5

10

V+

V-

WIRING DIAGRAM

ICON 7

ICON 8

ICON 6

SENDER 1

SETUP

ENABLE

ICON 5

DC PWR

SUPPLY

V+

V-

ICON 7

ICON 8

ICON 6

KEYSWITCH

HOUR METER

ENABLE

SETUP

ENABLE

KEYSWITCH

HOUR METER

ENABLE

SETUP

ENABLE

KEYSWITCH

HOUR METER

ENABLE

ICON 5

DC PWR

SUPPLY

V+

V-

ICON 7

ICON 8

ICON 6

WIRING DIAGRAM

10

5

2 3 4

1

9

8

7

6

5 6 7 8

1

4

3

2

-

+

J2

J1

TYPICAL WIRING DIAGRAM FOR VOLTMETER

LOAD

*

LOAD

*

J1

J2

+

-

2 3 4

1

8

7

6

5

6 7 8 9

1

4

3

2

5

10

WIRING DIAGRAM

MOLEX CONNECTOR

AMP CONNECTOR

ICON 5

DC PWR

SUPPLY

V+

V-

ICON 7

ICON 8

ICON 6

ICON 5

DC PWR

SUPPLY

V+

V-

ICON 7

ICON 8

ICON 6

ICON 5

SENDER 2

DC PWR

SUPPLY

V+

V-

ICON 7

ICON 8

ICON 6

SENDER 1

SETUP

ENABLE

KEYSWITCH

HOUR METER

ENABLE

SETUP

ENABLE

KEYSWITCH

HOUR METER

ENABLE

SETUP

ENABLE

KEYSWITCH

HOUR METER

ENABLE

PIN 2= 0.5A FET

PIN 6= 0.5A FET

PIN 2= 0.5A FET

PIN 6= 0.5A FET

PIN 2= 0.5A FET

PIN 6= 0.5A FET

AUTO-RANGE SWITCH

OPEN = 24V OR 48V

CLOSED = 12V OR 36V

AUTO-RANGE SWITCH

OPEN = 24V OR 48V

CLOSED = 12V OR 36V

WIRING DIAGRAM

10

5

2 3 4

1

9

8

7

6

5 6 7 8

1

4

3

2

-

+

J2

J1

TYPICAL WIRING DIAGRAM FOR BATTERY DISCHARGE 

INDICATOR

LOAD

*

LOAD

*

J1

J2

+

-

2 3 4

1

8

7

6

5

6 7 8 9

1

4

3

2

5

10

WIRING DIAGRAM

MOLEX CONNECTOR

AMP CONNECTOR

AMP CONNECTOR

MOLEX CONNECTOR

WIRING DIAGRAM

10

5

2 3 4

1

9

8

7

6

5 6 7 8

1

4

3

2

-

+

J2

J1

TYPICAL WIRING DIAGRAM FOR RESISTANCE BASED 

SENDERS

LOAD

*

LOAD

*

ICON 5

SENDER 2

J1

J2

DC PWR

SUPPLY

+

-

2 3 4

1

8

7

6

5

6 7 8 9

1

4

3

2

5

10

V+

V-

WIRING DIAGRAM

ICON 7

ICON 8

ICON 6

SENDER 1

SETUP

ENABLE

ICON 5

DC PWR

SUPPLY

V+

V-

ICON 7

ICON 8

ICON 6

KEYSWITCH

HOUR METER

ENABLE

SETUP

ENABLE

KEYSWITCH

HOUR METER

ENABLE

SETUP

ENABLE

KEYSWITCH

HOUR METER

ENABLE

ICON 5

DC PWR

SUPPLY

V+

V-

ICON 7

ICON 8

ICON 6

WIRING DIAGRAM

10

5

2 3 4

1

9

8

7

6

5 6 7 8

1

4

3

2

-

+

J2

J1

TYPICAL WIRING DIAGRAM FOR VOLTMETER

LOAD

*

LOAD

*

J1

J2

+

-

2 3 4

1

8

7

6

5

6 7 8 9

1

4

3

2

5

10

WIRING DIAGRAM

MOLEX CONNECTOR

AMP CONNECTOR

ICON 5

DC PWR

SUPPLY

V+

V-

ICON 7

ICON 8

ICON 6

ICON 5

DC PWR

SUPPLY

V+

V-

ICON 7

ICON 8

ICON 6

ICON 5

SENDER 2

DC PWR

SUPPLY

V+

V-

ICON 7

ICON 8

ICON 6

SENDER 1

SETUP

ENABLE

KEYSWITCH

HOUR METER

ENABLE

SETUP

ENABLE

KEYSWITCH

HOUR METER

ENABLE

SETUP

ENABLE

KEYSWITCH

HOUR METER

ENABLE

PIN 2= 0.5A FET

PIN 6= 0.5A FET

PIN 2= 0.5A FET

PIN 6= 0.5A FET

PIN 2= 0.5A FET

PIN 6= 0.5A FET

*

Use of output FET driver requires installation of suppression diodes across all inductive loads.

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