Transcription of COMPONENT ORIENTATION CORRECT WHEN …
1 DEAFR elayLUCASM odel RB108 LUCASCOIL12V1342 OPSUPPLYSTARTER MOTORLUCAS 25079 JGENERATORLUCAS 22703H 12 VIGNITION KEY SWITCHON / OFFBATTERY80Ah12 VPOSITIVE EARTHG rounded to chassisat oil filler castingCHARGE INDICATOR12 V INCANDESCENTSTART SWITCH(momentary)activated by gear-stickChassis ground to switch mount nutDISTRIBUTORF iring seq 1-3-4-2(Cylinder #1 at front of motor)Wiring diagram forFERGUSON TEA20 TRACTORS erial # TEA477296 (1955)Petrol 4 cylinder (Standard engine)12v Positive earth system 2004 Adrian Redmond / -Auxiliary equipment such as headlights, taillights, reversing/work-lamp, horn etc. are not shown, but would be wired as for negative earth, between chassis/battery +ve terminal (earth) and either starterswitch -ve input (independent of ignition key), or via a relay fed from starter switch -ve terminal but switched via output of ignition key switch (dependent on ignition switch).
2 COMPONENT ORIENTATION CORRECT when TRACTOR IS VIEWED FROM ABOVE FROM LEFT (DISTRIBUTOR) SIDE OF TRACTORFUSE 17 ASUPPLY TOLIGHTSSWITCHGROUND STRAPTO LIGHTSHORN PUSH SWITCH(Momentary)Wiring diagram for lights & hornFERGUSON TEA20 TRACTORS erial # TEA477296 (1955)Petrol 4 cylinder (Standard engine)12v Positive earth system 2004 Adrian Redmond / ORIENTATION CORRECT when TRACTOR IS VIEWED FROM ABOVE FROM LEFT (DISTRIBUTOR) SIDE OF TRACTORRIGHTHEADLIGHTHIGHDIPPARKINGHIGHC OMMONDIPCOMMONPARKINGLEFTHEADLIGHTHIGHDI PPARKINGHIGHCOMMONDIPCOMMONPARKINGTAIL RIGHTTAIL LEFTREAR RIGHTWORKLAMPOFF123 FERGUSONLIGHT SWITCH(rear view)LIGHTS COMMONGROUND7 WIRE CABLEON LEFT SIDE OF MOTORCABLE LOOM SPLITS AT INSIDETOP OF GRILLE(Common doubled)(white)(black)(green)(brown)(yel low)(blue)(green)(red)FUSE 17 AGROUND STRAP TOSTARTER SWITCHMOUNT BOLTSUPPLY 12V -veFROMIGNITION KEY7 WIRE CABLEON RIGHT SIDE OF GEARBOXJUNCTION BOXUNDER LIFTCONTROL ARM(Black - SPARE)(Black - SPARE)(Brown - SPARE)Black and White wiresspare but fed to each tailYellow and Red spareand unusedSWITCHDIP BEAMCOMMONHIGH BEAMH4 LAMP SEEN FROM REARHORNO riginal TEA horn button has one terminal which is shorted to switch chassis and ground when pressed, therefore to use this button the horn must be permanently fed with 12v and grounded via the switch.
3 Remember that the tractor is positive ground!For modern single pole button with isolated terminals feed live to one horn terminal via switch and ground the other horn Lucas lights selector allows for separate selection of front side/parking lights (pos 1), dipped headlights (pos 2) and main beam (pos 3) whilst powering rear side/parking lights in all 3 accomplish this, supply must be as indicated with rear side/parking lights fed from switch or replace switch spring to ensure good contact.
