Lotus Elan

mystery switch

PostPost by: Apx » Sat Sep 22, 2012 11:23 am

IMG_0543.jpg and
Can anyone tell me what this switch is for, it doesn't seem to do anything but appears original and the same type as the "security switch" in the glove box. It is located on the bracket of the bonnet pull as shown in the photo's. my car is an early series 4 from 1968, uk spec.
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IMG_0541.JPG and
IF EVERYTHING SEEMS TO BE GOING WELL, YOU HAVE OBVIOUSLY OVERLOOKED
SOMETHING.
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PostPost by: garyeanderson » Sat Sep 22, 2012 11:35 am

hazard switch
hazzard switch.JPG and
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PostPost by: Apx » Sat Sep 22, 2012 12:09 pm

Cheers, i think your right although the wiring is wrong colour in loom, but it appears to be going to the right area. i would never have found the switch with the lower shroud in place, what more surprises lay in wait as i take bits apart!!
IF EVERYTHING SEEMS TO BE GOING WELL, YOU HAVE OBVIOUSLY OVERLOOKED
SOMETHING.
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PostPost by: Alasdair » Sat Sep 22, 2012 12:27 pm

If the car is a coupe and has a rear screen demister option, this is where the switch was placed.
Alasdair.

1953 David Brown Cropmaster
1954 S1 Land Rover
1962 Elite S2
1966 Lotus Cortina MK1
1968 Elan S3 SS Coupe
1968 Austin J40
1969 Elan S4 SE DHC
1972 Elan Sprint
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PostPost by: garyeanderson » Sat Sep 22, 2012 12:44 pm

Here is a photo of my bonnet pull and switch from the 1970 RHD Coupe that has been converted to LHD.

Gary

under dash 70 Coupe.JPG and


Alasdair wrote:If the car is a coupe and has a rear screen demister option, this is where the switch was placed.


My 70 Coupe has the red switch in the A pillar below the eye-ball vent, there is no definite true statement when you talk about the Elan and its changes, the best price always won out over all else! :)
rear demist switch in place.JPG and
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PostPost by: Alasdair » Sun Sep 23, 2012 12:52 pm

The Green and Yellow wiring on the switch is consistent with the wires that go to the heated window.

We just searched this out as our Sprint Coupe had the heated window but we could not find the switch that had been removed, the Green and yellow wiring was in the vicinity, the switch location was confirmed speaking to Coupe owners at this years Silverstone Classic.
Alasdair.

1953 David Brown Cropmaster
1954 S1 Land Rover
1962 Elite S2
1966 Lotus Cortina MK1
1968 Elan S3 SS Coupe
1968 Austin J40
1969 Elan S4 SE DHC
1972 Elan Sprint
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PostPost by: Apx » Sun Sep 23, 2012 3:44 pm

My car is an original dhc, with all matching numbers. At present i can't find the relay for the hazards so if its for heated rear window this leaves me further puzzled. More digging for wires and testing to come i feel!
IF EVERYTHING SEEMS TO BE GOING WELL, YOU HAVE OBVIOUSLY OVERLOOKED
SOMETHING.
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PostPost by: garyeanderson » Sun Sep 23, 2012 4:33 pm

Alasdair wrote:The Green and Yellow wiring on the switch is consistent with the wires that go to the heated window.

We just searched this out as our Sprint Coupe had the heated window but we could not find the switch that had been removed, the Green and yellow wiring was in the vicinity, the switch location was confirmed speaking to Coupe owners at this years Silverstone Classic.



The wire from the hazard switch to the hazard flasher are light green and light green yellow to the hazard warning lamp.

Wiring to the rear screen heater switch is green, and to the rear screen heater is black with white tracer. well at least that is what the diagram in the manual reads.
hazards and heated rear screen.JPG and


Lotus did use mostly standard Lucas colors, the rear screen may not be one but the wire is a black with white tracer to the rear screen.

the hazards are a standard Lucas color code.

http://www.bmcautos.com/projects-blogs/60


Lucas Wiring Color Codes

Many British designed vehicles use colour coded cables to assist in identifying the various circuits in use. This is an extract from BS-AU7a 1983 Colour Code for Vehicle Wiring, from the British Standards Institution, 2 Park St., London W1A 2BS.

(Note that these colour codes may not apply directly to older cars. For example, the wipers on cars up to 1980 (at least) are not on a separate fuse circuit, so they are not orange, but green. Check the schematic for your car to be certain. - cak)
MAIN TRACER PURPOSE
Black All earth connections
Black Brown Tachometer generator to tachometer
Black Blue Tachometer generator to tachometer
Black Red Electric or electronic speedometer to sensor
Black Purple Tempreature switch to warning light
Black Green Relay to radiator fan motor
Black Light green Vacuum brake switch or brake differential pressure valve to warning light and/or buzzer
Black White Brake fluid level warning light to switch and handbrake swith, or radio to speakers
Black yellow Electric speedometer
Black Orange Radiator fan motor to thermal switch




MAIN TRACER PURPOSE
Blue Lighting switch (head) to dip switch
Blue Brown Headlamp relay to headlamp fuse
Blue Red Dip switch to headlamp dip beam fuse
Fuse to right-hand dip headlamp
Blue Light green Headlamp wiper motor to headlamp wash pump motor
Blue White a) Dip switch to headlamp main beam fuse
b)Headlamp flasher to main beam fuse
c)Dip switch main beam warning light
d)Dip switch to long-range driving light switch
Blue Yellow Long-range driving light switch to lamp
Blue Black Fuse to right-hand main headlamp
Blue Pink Fuse to left-hand dip headlamp
Blue Slate Headlamp main beam fuse to left-hand headlamp or inboard headlamps when independently fused
Blue Orange Fushe to right-hand dip headlamp




MAIN TRACER PURPOSE
Brown Main battery lead
Brown Blue Control box (compensated voltage control only) to ignition switch and lighting switch (feed)
Brown Red Compression ignition starting aid to switch
Main battery feed to double pole ignition switch
Brown Purple Alternator regulator feed
Brown Green Dynamo 'F' to controlboxl 'F'
Alternator field 'F' to control box 'F'
Brown White Ammeter to control box
Ammeter to main alternator terminal
Brown Yellow Alternator to 'no charge' warning light
Brown Black Alternator battery sensing lead
Brown Slate Starter relay contact to starter solenoid
Brown Orange Fuel shut-off (diesel stop)




MAIN TRACER PURPOSE
Green Accessories fuesed via ignition switch
Green Brown Switch to reverse lamp
Gree Blue Water temperature gauge to temperature unit
Green Red Direction indicator switch to left-hand flasher lamps
Green Purple Stop lamp switch to stop lamps, or stop lamp switch to lamp failure unit
Green Light green Hazard flasher unit to hazard pilot lamp or lamp failure unit to stop lamp bulbs
Green White Direction indicator switch to right hand flasher lamps
Green Yellow Heater motor to switch single speed (or to 'slow' on tow- or three-speed motor)
Green Black Fuel gauge to fuel tank unit or changeover switch or voltage stabilizer to tank units
Green Pink Fuse to flasher unit
Green Slate a)Heater motor to switch ('fast' on two- or three-speed motor)
b)Coolant level unit to warning light
Green Orange Low fuel level switch to warning light




MAIN TRACER PURPOSE
Light green Instrument voltage stabilizer to instruments
Light green Brown Flasher switch to flasher unit
Light green Blue a)Flasher switch to left-hand flasher warning light
b)Coolant level sensor to control unit
c)Test switch to coolan level control unit
Light green Red Fuel tank changeover switch to right-hand tank unit or entry and exit door closed switch to door actuator
Light green Purple Flasher unit to flasher warning light
Light green Green Start inhibitor relay to change speed switch; or switch to heater blower motor second speed on three-speed unit
Light green White Low air pressure switch to buzzer and warning light
Light green Yellow Flasher switch to right-hand warning light; or differential lock switch to differential lock warning light
Light green Black Front screen jet switch to screen jet motor
Light green Slate Fuel tank changeover switch to left-hand tank unit; or entry and exit door open switch to door actuator
Light green Orange Rear window wash switch to wash pump; or cab lock-down switch to warning light




MAIN TRACER PURPOSE
Orange Wiper circuits fused via ignition switch
Orange Blue Switch to front screen wiper motor first speed timer or intermittend unit
Orange Green Switch to front screen wiper motor second speed
Orange Black Switch to front screen wiper motor parking cicuit, timer or intermittent unit
Orange Purple Timer or intermittent unit to motor parking circuit
Orange White Timer or intermittent unit to motor parking circuit
Orange Yellow Switch to headlamp or rear window wiper motor feed, timer or relay coil
Orange Light green Switch to headlamp or rear window wiper motor parking circuit timer or relay coil
Orange Pink Timer or relay to headlamp or rear window wiper motor feed
Orange Slate Timer or relay to headlamp or rear window wiper motor parking circuit
Pink white Ballast terminal to ignition distributor




MAIN TRACER PURPOSE
Purple Accessories fed direct from battery via fuse
Purple Brown Horn fuse to horn relay when horn is fused separately
Purple Blue Fuse to heated rear window relay or switch and warning light
Purple Red Switches to map light, under bonnet light, glove box light and boot lamp when fed direct from battery fuse
Purple Green Fuse to hazard flasher
Purple Light green Fuse to relay for screen demist
Purple White Interior lights to switch (subsidiary circuit door safety lights to switch)
Purple Yellow Horn to horn relay
Purple Black Horn to horn relay to horn push
Purple Pink Rear heated window to switch or relay
Purple Slate Aerial lift motor to switch up
Purple Orange Aerial lift motor to switch down




MAIN TRACER PURPOSE
Red Main feed to all circuits mastered by sidelamp switch
Red Brown Rear fog guard switch to lamps
Red Blue Front fog lamp fuse to fog lamp switch
Red Purple Switches to map light, under bonnet light, glove box light and boot lamp when sidelamp circuit fed
Red Green Bulb failure unit to right-hand-side and rear lamps
Red White a)Sidelamp fuse to right-hand side and rear lamps
b)Sidelamp fuse to panel light rheostat
c)Fuse to panel light switch or rheostat
d)Fuse to fibre optic source
Red Yellow Fog lamp switch to fog lamp or front fog fuse to fog lamps
Red Blakc Left-hand,sidelamp fuse to side and tail lamps and number plate illumination
Red Pink Sidelamp fuse to lighting relay
Red Slate Lamp failure unit to lef-hand side and tail lamps
Red Orange Fusebox to rear fog guard switch
Slate Window lift main lead




MAIN TRACER PURPOSE
White Ignition switch or starter solenoid to ballast resistor
White Brown Oil pressure switch to warning light or gauge, or starter relay to oil pressure switch
White Blue Choke switch to choke solenoid (unfused) and/or choke to switch to warning light, or electronic ignition distributor to drive resistor
White Red Starter switch to starter solenoid or inhibitor switch or starter relay or ignition (start position) to bulb failure unit
White Purple Fuel pump no 1 or right-hand to changeover switch
White Green Fuel pump no 2 or left-hand to changeover switch
White Light green Start switch to starter interlock or oil pressure switch to fuel pump or start inhibitor switch to starter relay or solenoid
White Yellow Ballast resistor to coil or starter solenoid to coil
White Black Ignition coil contact breaker to distributor contact breaker, or distributor side of coil to voltage impulse tachometer
White Pink Ignition switch to radio fuse
White Slate Current tachometer to ignition coil
White Orange Hazard warning lead to switch
Yellow a)Overdrive
b)Petrol injection
c)Door locks
d)Gear selector switch to start
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PostPost by: Apx » Sun Sep 23, 2012 4:57 pm

There's no hazard warning lamp on the dashboard
IF EVERYTHING SEEMS TO BE GOING WELL, YOU HAVE OBVIOUSLY OVERLOOKED
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PostPost by: jmp » Sun Sep 23, 2012 6:22 pm

Can I hi-jack part of this post APX and request a full picture of the hazard switch relay circuit as it is the next job on my list?

Thanks,

John
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PostPost by: garyeanderson » Sun Sep 23, 2012 8:25 pm

jmp wrote:Can I hi-jack part of this post APX and request a full picture of the hazard switch relay circuit as it is the next job on my list?

Thanks,

John


from Elan.net electrical section
http://www.lotuselan.net/publish/electrical.shtml

a slightly modified diagram with some additional relays

modified S4 wiring diagram text.jpg and

http://www.lotuselan.net/uploads/elan_modified_wiring.pdf

Hazard circuit is on page 3 just above the heater motor

Gary
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PostPost by: elansprint71 » Sun Sep 23, 2012 9:11 pm

There were no hazards fitted in 68.
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PostPost by: StressCraxx » Sun Sep 23, 2012 9:19 pm

elansprint71 wrote:There were no hazards fitted in 68.


Umm, I have a late '67 Elan (45/7279) built in July/Aug '67, titled in March '68. It has a pull type hazard flasher switch under the far left side of the dash. I believe hazard lights were required for the US in '68.

Regards,
Dan Wise
There is no cure for Lotus, only treatment.
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PostPost by: jmp » Mon Sep 24, 2012 9:17 am

Thanks for the diagrams for the hazard circuit duly noted and to be actioned over the next few days. I'll feel safer with one (despite being a '68 S4) as where I broke down when I collected the S4 one would have been very useful.

John
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