Garth Posted April 7, 2014 Share Posted April 7, 2014 Trying to understand the symbols on the Caterham electrical layout for the 'Engine Harness'? Not clear - to me! - what all the symbols are and they do not all seem to terminate in obvious places? Edited by - Garth on 9 Apr 2014 11:37:10 Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted April 7, 2014 Member Share Posted April 7, 2014 Can you post a link to the document? There are lots of different diagrams around. Then give an example of a symbol on that specific diagram. Do you know the colour code for wiring already? Jonathan Link to comment Share on other sites More sharing options...
Garth Posted April 8, 2014 Author Share Posted April 8, 2014 Hi Jonathan - have sent you mail as have not learnt how to post photos etc on blatchat! Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted April 8, 2014 Member Share Posted April 8, 2014 Got them. Abbreviations for colour of wiring (may contain references to Land Rovers) Commonly used wire colours for British cars and more of the same. ... we're looking at the Sigma engine harness and the Sigma main harness, standard instrumentation. Jonathan Link to comment Share on other sites More sharing options...
Garth Posted April 9, 2014 Author Share Posted April 9, 2014 Thanks Jonathan - now understand the colours. I can trace most of the numbers from one connector to another, but there are some which seem to terminate in-between 'junctions' on the loom diagram. What happens to these? They are also 'grouped' i.e. WK 26/27/28/50 - cannot all be to earth as some numbers appear on another connector and the coolant temp sensor wires both go to one of these loom midpoints! Hope someone can shed some light? Link to comment Share on other sites More sharing options...
Rattie Posted April 9, 2014 Share Posted April 9, 2014 Hi Garth Yes, those are commoning points. Some will be earth, some 12v, some switched live,etc. Martyn Link to comment Share on other sites More sharing options...
Garth Posted April 9, 2014 Author Share Posted April 9, 2014 Hi Martyn - staring to make sense now - thanks Link to comment Share on other sites More sharing options...
oldbutnotslow Posted May 17, 2014 Share Posted May 17, 2014 British Standards Colour Codes for Cars Black All ground connections Black/ Purple Temperature switch to warning light Black/ Green Relay to radiator fan motor Black/ Light green Brake light switch Black/Orange Radiator fan motor to thermal (fan)switch Black/red From 3 terminal flasher unit to flasher light Black/white Flasher unit light to ground Blue Headlamp feed Blue Headlamp switch to dip switch Blue White Headlight high beams Blue/ White High beam dip switch to high beam indicator lamp Blue/ White Dip switch to Driving light switch Blue/ Red Headlight low beams Blue/ Yellow Driving lamp switch to lamp Brown Main feed from the battery. No switches or fuses Brown/ Blue Power feed to headlamp switch Brown/ White Ammeter to main alternator terminal Brown/ Yellow Alternator to 'no charge' warning light Brown/ Green Fuse to horn (No relay) Brown/ Lt. Green Windscreen wiper motor to switch Brown/ Black Horn to horn button (no relay) Green Ignition switch controlled wiring for auxiliary devices, switched 12V to individual wiper motors, to brake light switch, flashers, etc Green/ Black Fuel gauge to fuel tank unit Green/ Blue Water temperature gauge to temperature sender unit Green/ Brown Switch to reverse lamp Green/ Red Direction indicator switch to left-hand flasher lamps Green/ Purple Stop lamp switch to stop lamps Green/ White Direction indicator switch to right hand flasher lamps Green/ Yellow Heater switch to slow speed on heater motor or for single speed motor Green/ Yellow Oil pressure light to oil pressure switch Green/ Gray Heater switch to high speed on heater motor Light green Voltage stabilizer to instruments on LRs fitted with voltage stabilizer Light green/ Black Windscreen washer switch to motor Light green/ Blue Flasher switch to left-hand flasher warning light Light green/ Brown Flasher switch to flasher unit Light green/ Purple Flasher unit to flasher warning light Light green/ Orange Rear window washer switch to motor Orange Wiper circuit (single motor wiper system) Orange/ Black Wiper switch to to motor parking Orange/ Blue wiper switch to low speed on motor Orange/ Green Wiper switch to high speed on motor Orange/ Yellow Rear wiper switch to rear wiper motor Orange/ Light green Switch to rear window motor parking Purple Accessories fed direct from battery via fuse (Always live) Purple/ Brown Horn fuse to horn relay when horn is fused separately Purple/ Red Switches to map light, under bonnet light, glove box light and boot lamp when fed direct from battery Red Tail lights, instrument lights, parking lights and side markers Red/ Yellow Fog light switch to fog light or front fog light fuse to fog lights Red/ Blue Front fog light fuse to fog light switch Red/ Brown Rear fog guard switch to lamps Red Orange Power to rear fog guard lamp fuse Red/ White Fuse to instrument lamp switch, Instrument panel lamps White Ignition circuit, no additional switches, not fused White Power to coil, fuse to cold running light White Power to electric fuel pump White/ Black Ignition coil to distributor White/ Black Distributor side of coil to tach impulse sensor White/ Brown Oil pressure switch to warning light or gauge White/ Pink Ignition switch to radio fuse White/ Red Ignition switch or starter switch to starter solenoid Link to comment Share on other sites More sharing options...
ChrisC Posted May 17, 2014 Share Posted May 17, 2014 Hi Garth Do you have a specific problem, or is it just curiosity? Link to comment Share on other sites More sharing options...
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