TE20 Generator and Alternator wiring diagrams

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F D

TEA 20 WIRING DIAGRAM - ORIGINALLY POSITIVE EARTH

AMMETER

GENERATOR

GENERATOR WARNING LAMP

D

E

A

F

GENERATOR

CONTROL BOX

(REGULATOR)

Spark Plugs firing order

1-3-4-2

#1 cylinder is at the front

1 2 3 4

DISTRIBUTER

-

+

LIGHT

SWITCH

Fuse

15A

IGNITION SWITCH

- +

STARTER

STARTER

SOLENOID

- BATTERY +

HEAD LIGHTS

COIL

Positive Earth

TAIL LIGHTS

To polarizer the Generator to suite the polarity, remove the F & D leads from the Generator and with a lead connected to the Negative

terminal of the battery, flash the Field “F” terminal on the generator til you see a small spark, then replace the leads in the same position.

NOTE! The Generator must be attached to the chassis and Battery connected to maintain the polarity.

Any break in the system will require the process to be repeated.


TEA 20 WIRING DIAGRAM - for TRACTORS CONVERTED TO NEGATIVE EARTH

F D

GENERATOR

GENERATOR WARNING LAMP

D

E

A

F

GENERATOR

CONTROL BOX

(REGULATOR)

Spark Plugs firing order

1-3-4-2

#1 cylinder is at the front

1 2 3 4

AMMETER

DISTRIBUTER

+ -

LIGHT

SWITCH

Fuse

15A

IGNITION SWITCH

- +

STARTER

STARTER

SOLENOID

BATTERY

+ -

HEAD LIGHTS

COIL

Negative Earth

TAIL LIGHTS

To polarizer the Generator to suite the polarity, remove the F & D leads from the Generator and with a lead connected to the Positive

terminal of the battery, flash the Field “F” terminal on the generator til you see a small spark, then replace the leads in the same position.

NOTE! The Generator must be attached to the chassis and Battery connected to maintain the polarity.

Any break in the system will require the process to be repeated.


When and How to Polarize a Generator

Polarization is a procedure which matches the polarity for the generator and the voltage regulator by permitting a surge of current to flow

through the generator, correctly polarizing it. Damage to electrical components can occur if polarities do not match.

Ferguson tractors have utilized both positive and negative ground systems.

Delco 6V systems have positive ( + ) ground.

Delco 12 V systems have negative ( - ) ground.

Lucas systems for both 6V and 12V models have positive ( + ) ground.

Lucas systems converted to electronic distributer with a 12V system have negative ( - ) ground.

Polarization of the generator should take place whenever any of the following events occur:

1. The battery is replaced or disconnected from the tractor

2. The generator is replaced or serviced

3. The regulator is replaced or serviced

If any of these events occurred, do not start the engine until polarization is done.

The polarity of the generator must be set to match that of the voltage regulator.

For positive ground systems: To polarizer the Generator to suite the polarity, remove the F & D leads from the Generator and with a

lead connected to the Negative terminal of the battery, flash the Field “F” terminal on the generator til you see a small blue spark, then

replace the leads in the same position as they were before.

For negative ground systems: To polarizer the Generator to suite the polarity, remove the F & D leads from the Generator and with a

lead connected to the Positive terminal of the battery, flash the Field “F” terminal on the generator til you see a small blue spark, then

replace the leads in the same position as they were before.

NOTE! The Generator and Battery Earth must be attached to the chassis to maintain the polarity.

Any break in the system (i.e. battery or generator removed or regulator wiring disconnected) will require the process

to be repeated.


Ind Bat

TEA 20 WIRING DIAGRAM - NEGATIVE EARTH

ALTERNATOR

ALTERNATOR WARNING LAMP

Spark Plugs firing order

1-3-4-2

#1 cylinder is at the front

1 2 3 4

GENERATOR

CONTROL BOX

(REGULATOR)

REGULATOR

NOT

REQUIRED

AMMETER

DISTRIBUTER

+ -

LIGHT

SWITCH

Fuse

15A

IGNITION SWITCH

- +

STARTER

STARTER

SOLENOID

BATTERY

+ -

HEAD LIGHTS

COIL

Negative Earth

TAIL LIGHTS

The Alternator requires no Polarization process


D

F

Ferguson TEA20 Tractor with a Generator

12V Positive earth system plus Ammeter wiring explained

Yellow

May also be grounded

at starter switch

Green

Note! If no Ammeter,

wire directly from

A on Regulator to

the starter switch

as shown

Yellow

Green Strip

-

Black

Ammeter

D

E

A

F

GENERATOR

CONTROL BOX

(REGULATOR)

Yellow

White

Yellow

Green Strip

Charge Indicator

White

Keyed Ignition Switch

ON/OFF

Fuse 15A

Circuit for accessories

if required

Ground return from

accessories, if required.

Terminate on the “-” battery

terminal or any where on

the chassis i.e. the ground

bolt on the starter switch

1 2

+

3 4

DISTRIBUTOR

Firing seq. 1-3-4-2

(Cilinder #1 at front of moter

Red

Black

+ -

LUCAS

COIL

12V

STARTER MOTOR

LUCAS 25079J

Yellow

Green Strip

-

+

12V

Battery

Firing order 1-3-4-2 #1 cylinder is at the front

Negative Earth

Can be grounded to the chassis at

the Oil Filler Casting or the mounting

bolts on the starter motor or one of

the steering housing bolts.

Anywhere will do so long as there is

a good earth connection.

To polarizer the Generator to suite the polarity, remove the F & D leads from the Generator and with a lead connected to the Negative

terminal of the battery, flash the Field “F” terminal on the generator til you see a small spark, then replace the leads in the same position as before.

NOTE! The Generator must be attached to the chassis and Battery connected to maintain the polarity.

Any break in the system will require the process to be repeated.


Ferguson TEA20 Tractor with a Generator

12V Negative earth system

Yellow

D

F

Yellow

May also be grounded

at starter switch

Green

Note! If no Ammeter,

wire directly from

A on Regulator to

the starter switch

as shown

Yellow

Green Strip

+

Black

Ammeter

D

E

A

F

GENERATOR

CONTROL BOX

(REGULATOR)

White

Yellow

Green Strip

Charge Indicator

White

Keyed Ignition Switch

ON/OFF

Fuse 15A

Circuit for accessories

if required

Ground return from

accessories, if required.

Terminate on the “-” battery

terminal or any where on

the chassis i.e. the ground

bolt on the starter switch

1 2

-

3 4

DISTRIBUTOR

Firing seq. 1-3-4-2

(Cilinder #1 at front of moter

Red

Black

-

+

LUCAS

COIL

12V

STARTER MOTOR

LUCAS 25079J

Yellow

Green Strip

+

-

12V

Battery

Firing order 1-3-4-2 #1 cylinder is at the front

Negative Earth

Can be grounded to the chassis at

the Oil Filler Casting or the mounting

bolts on the starter motor or one of

the steering housing bolts.

Anywhere will do so long as there is

a good earth connection.

To polarizer the Generator to suite the polarity, remove the F & D leads from the Generator and with a lead connected to the Positive

terminal of the battery, flash the Field “F” terminal on the generator til you see a small spark, then replace the leads in the same position as before.

NOTE! The Generator must be attached to the chassis and Battery connected to maintain the polarity.

Any break in the system will require the process to be repeated.


This is the colour coding of the harness that I purchased

all going well, this maybe a standard colour coding used in Australia.

NOTE! The harness did not have the wires in the appropriate place for the ammeter, hence the comment at the Ammeter**

Generator

Charge light

Regulator

Ignition Switch

Coil

Ammeter

Distributer

“F” small lug green to “F” on regulator

“D” large lug yellow to “D” to charge light then extended to “D” on regulator

white to ignition switch

yellow from “D” on generator then extended to “D” on regulator

“F” green from generator

“A” yellow with green stripe to positive side of starter switch

“E” black to earth

“D” yellow from generator via charge light

white from charge light then to + on coil for negative earth or - on coil for positive earth

yellow with green stripe to positive side of starter switch

white to ignition switch

cut the yellow with a green stripe wire in an appropriate place, connect the end of the cut wire from the

regulator to the + side of the ammeter and the other end to the - side of the ammeter (i.e. “A” on regulator

to “+” on ammeter then “-” on ammeter to battery side of starter switch

Note!** you will need to add wire to extend to the ammeter

some distributers have 2 wires 1 red and 1 black.

connect the black to “-” on coil and red to “+” on coil.

Alternator

Regulator

Charge light

Alternator conversion kit B8810 from Bare-Co

Note! Tractor must be Converted to Negative earth system

disconnect (cut back & tape up) all wires from the generator..........................

}

disconnect (cut back & tape up) all wires from the regulator........................... these wires are now NOT required

disconnect (cut back & tape up) original yellow wire(s) on the charge light.

New Harness connect red wire with large spade terminal to “B+ on alternator, other end to battery “+” or if fitted, ammeter “+”

((another red wire is then required (not supplied) to run from ammeter - to battery +))

connect new yellow wire with small spade terminal to “D+” on alternator and terminate on charge light in place of

the original yellow wire(s) Job Done.

Disclaimer: While I have done my best to ensure acsuracy on these eight pages, no responsibility is accepted for errors or omissions of information


Ferguson TEA20 Tractor with an Alternator

12V Negative earth system

1 2

3 4

Alternator

DISTRIBUTOR

Firing seq. 1-3-4-2

(Cilinder #1 at front of moter

Bat

New Yellow as provided in Alternator Harness

D+

Red

Black

-

+

LUCAS

COIL

12V

Red

+

Note! If no Ammeter,

wire directly from Ammeter

“B” on Alternator to

the Positive Battery

Terminal. Otherwise

add a new wire (red)

from the - on the ammeter to

the Positive Battery Terminal

STARTER MOTOR

LUCAS 25079J

D

E

A

F

Red continued

GENERATOR

CONTROL BOX

(REGULATOR)

No Ammeter

see note 1

White

Yellow

Green Stripe

+

-

Charge Indicator

White

12V

Battery

Fuse 15A

Circuit for accessories

if required

Ground return from

accessories, if required.

Terminate on the “-” battery

terminal or any where on

the chassis i.e. the ground

bolt on the starter switch

Keyed Ignition Switch

ON/OFF

Negative Earth

(Some tractors have the

Battery Grounded to the

chassis at the Oil Filler Casting

some to one of the mounting

bolts on the starter motor )

The Alternator requies no Polarization process.

Note 1: this wire can also be terminated at the battery “+” terminal

instead of the battery side of the starter switch

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