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