Announcement

Collapse
No announcement yet.

Engine Bay Wiring - Colours and what to expect

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Engine Bay Wiring - Colours and what to expect

    Just a very quick reference to the wiring colours in your engine bay rather than look up the manual then colour codes

    Area Main Colour / Stripe Function Comment Gauge / Load
    ENGINE BAY LEFT / RIGHT / COVER RED / No Stripe Side/Tail lights and number plate Left / Right / Number Plate
    ENGINE BAY LEFT Green / Red Indicators Left Indicator 21W lamp
    ENGINE BAY RIGHT Green / White Indicators Right Indicator 21W lamp
    ENGINE BAY LEFT / RIGHT Green / Purple Stop Lights Left / Right Stop Lights 21W per lamp (x2 at rear)
    ENGINE BAY REAR Green / Purple Stop Light From Stop Lamp Switch behind radiator N/A
    ENGINE BAY REAR White Stop Light Ignition 12V Feed looped to coil feed To Stop Lamp Switch behind radiator N/A
    ENGINE BAY COIL White Coil 12V Ignition Feed looped to stop switch in
    ENGINE BAY ON ENGINE White / Black Distributor Points Connection From Distributor to -Ve side of coil
    ENGINE BAY ON ENGINE White / Blue Oil Pressure Switch (All models) To Lamp In Dash
    ENGINE BAY ON ENGINE White / Blue Water Temp SWITCH looped to oil pressure switch For cars with no Temp Guage the lamp doubles as water temp warning (lamp of doom) via the water temp SWITCH. Note the SWITCH is often mistaken as a sender, it is not !
    ENGINE BAY ON ENGINE Green / Blue Water Temp GUAGE This is for the water temp guage in the dash itself.
    ENGINE BAY RIGHT White / Red Solenoid Engage From Ignition Switch for Solenoid, note the Imp used several types of solenoid
    ENGINE BAY GENERATOR Brown / Yellow Generator Output Voltage Terminates on pin D of the RB340 (Large Spade) Large Gauge matches D pin on Generator
    ENGINE BAY GENERATOR Brown / Green Generator Field Winding Terminates on pin F of the RB340 Smaller Gauge matches F pin on Generator
    ENGINE BAY RIGHT RB340 Black / NO Stripe RB340 Chassis Ground Terminates Pin E on RB340 to Chassis
    ENGINE BAY RIGHT RB340 Brown / Yellow Ignition Warning Lamp From Pin WL on RB340 to Ignition Lamp
    ENGINE BAY RIGHT RB340 Brown / No Stripe Connection To Battery From either Pin B on RB340 to Live Side of Starter Solenoid Large Gauge
    ENGINE BAY RIGHT RB340 Brown / No Stripe Connection To Ignition Switch From either Pin B on RB340 to Ignition Switch Up Front Large Gauge

    Any corrections or omissions will be corrected on discovery

    Note :

    This assumes a Lucas alternator, Densos and others may require an additional wire to excite the winding's.

    For alternator wiring modifications you can now see what is needed

    First sort out the RB340

    Most people get confused at the multiple brown wires on the RB340, they are actually connected together at the RB340.

    My own preferred option is to unwrap the loom and remove the small brown "loop" heavy wire between pin B on the RB340 and the starter solenoid. It is not needed and just another two connections that can fail. Then remove the remaining heavy brown wire coming out from the inner wing to the other large spade terminal B on the RB340 and connect it to the large spade on the starter solenoid you removed the loop from.

    The charge lamp wire is next

    Remove the wires from terminal F and terminal WL on the RB340 and join them together. The wire that used to be connected to the F terminal on the generator can now be used for the ignition warning light terminal on the alternator (smaller of the 3)

    Now we need to ideally REMOVE the wire connected to D terminal on the generator and the D terminal on the RB340, to do this the loom needs unwrapped then bound up again.

    That again is a personal preference as I hate looking at patched wiring with wires that go nowhere, just wastes time PLUS removing the wire removes the temptation to use it as the chargeing supply as the alternator will be capable of supplying WAY more current than the wire can handle!

    Most alternators can supply 45-55A so you will need a new piece of wiring between the alternator output (big spades) and the battery terminal on the solenoid.

    Ideally you will be wanting at least 8mm CSA cable, (10mm better) with a large lug one end for the starter solenoid and one for the large spade on the alternator.

    I have a car to convert shortly so will post some pictures then cut/paste this portion into another thread.
    / John

    If it can be fixed with a hammer, I am your man
Working...
X