Lotus Elan

colors cablage wiring

PostPost by: geni » Wed Jul 08, 2020 4:07 pm

On my Sprint I want to add a switch with indicator light for the forcing function of the fan fixed to the radiator, but no diagram to my knowledge? and on the choice of the wiring color to adopt!
In auto electricity which wiring colors to use?

Thank you for your help
geni
Second Gear
Second Gear
 
Posts: 107
Joined: 30 Dec 2014
Location: FRANCE

PostPost by: wotsisname » Wed Jul 08, 2020 10:47 pm

I dont think that an overide switch for an automated fan would be fitted as standard by any manufacturer. so there is probably not a standard for it. Does it operate by supplying +12v to the fan motor or is it used as a return to earth ? This might determine the base colour for the wire you choose.
1968 Elan plus 2 - project
2007 Elise S2 [modified with a Hethel 70th sticker (yellow)]
2000 Elise S1 - Sold
wotsisname
Third Gear
Third Gear
 
Posts: 450
Joined: 24 Jun 2015
Location: Hertfordshire, UK

PostPost by: geni » Thu Jul 09, 2020 6:46 am

I do not understand your explanation (I am not competent) so I asked to know the colors used to recognize which harness it is by observing the colors and if necessary to probe!
(such as; purple = klacson or black = grounded)
So I hope to make myself understood as well. Thank you
geni
Second Gear
Second Gear
 
Posts: 107
Joined: 30 Dec 2014
Location: FRANCE

PostPost by: oldelanman » Thu Jul 09, 2020 7:40 am

geni wrote:On my Sprint I want to add a switch with indicator light for the forcing function of the fan fixed to the radiator, but no diagram to my knowledge? and on the choice of the wiring color to adopt!
In auto electricity which wiring colors to use?

Thank you for your help


Geni,
You have asked the same question before and Phil Harrison provided a circuit diagram with wiring colours. Have a look here......

viewtopic.php?f=38&t=45760&start=0
Roger
S4 DHC
oldelanman
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 1676
Joined: 02 Jan 2008
Location: Dorset UK

PostPost by: wotsisname » Thu Jul 09, 2020 8:01 am

The previous post (linked) is very useful, but depends on how much you know already.

if you google lucas wiring colours you may find useful help.


There is a book by John Dickens ("Automotive electrics, a practical guide"), £15 and is fairly new. I do not have a copy, so cannot say if it is good.. but it may help.
the lucas standard (Lotus may have followed it, maybe not always) would be for a black wire with green stripe (tracer) to supply power from the otter switch (usually in the radiator, with two wires from it) to the fan itself. My understanding is that the black tells you that the cable is heading to earth and the green stripe that it is a 12v supply to an accessory (the fan) which is then earthed. The green I believe also tells you that the supply is only live with the ignition on.


from google translate...
Il y a un livre de John Dickens ("Electricité automobile, un guide pratique"). Je n'ai pas de copie, je ne peux donc pas dire si elle est bonne .. mais cela peut aider - nous ne savons pas déjà combien vous en savez.
la norme lucas (Lotus peut l'avoir suivie, peut-être pas toujours) serait qu'un fil noir avec une bande verte (traceur) alimente le commutateur de loutre (généralement dans le radiateur, avec deux fils) vers le ventilateur lui-même. Ma compréhension est que le noir vous indique que le câble se dirige vers la terre et la bande verte qu'il s'agit d'une alimentation 12v à un accessoire (le ventilateur) qui est ensuite mis à la terre. Le vert, je crois, vous indique également que l'alimentation n'est active qu'avec le contact.
1968 Elan plus 2 - project
2007 Elise S2 [modified with a Hethel 70th sticker (yellow)]
2000 Elise S1 - Sold
wotsisname
Third Gear
Third Gear
 
Posts: 450
Joined: 24 Jun 2015
Location: Hertfordshire, UK

PostPost by: nmauduit » Thu Jul 09, 2020 9:50 am

geni wrote:I do not understand your explanation (I am not competent) so I asked to know the colors used to recognize which harness it is by observing the colors and if necessary to probe!
(such as; purple = klacson or black = grounded)
So I hope to make myself understood as well. Thank you


There is no certainty that a 50 years old car has not been modified a bit along the way.

First thing I would try to do is to identify the radiator fan relay (there probably is one so as not to overload the temperature switch), then check how it is driven by the temperature switch (most likely the temperature switch conveys a ground when active, that is hot) : this may be done by checking the switch with a voltmeter (or possibly a light on a wire...). If indeed the rad fan relay is activated by a ground return, which you can then check by touching that wire with a grounded wire and hear the relay clicking (and the fan starting if all is still connected), then the override switch will only be a matter of bringing an extra ground on that same terminal but controlled by your override switch.

Photos of the parts would be useful if you want practical help, starting with the temperature switch (and other relevant parts you deem appropriate).
S4SE 36/8198
User avatar
nmauduit
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 1481
Joined: 02 Sep 2013
Location: France

Total Online:

Users browsing this forum: No registered users and 12 guests