Bird on a wire - the rewire begins

[magpies]

looking good there

couple of questions

I presume the earth from the starter button goes to the +ve side of the alternator warning light (will obviously illuminate when cranking) ?

I wish to have a warning light showing when the rad fan is working - activated by either the Otter switch or the dash override switch - Connected to the relay power to fan connection.

[Penelope Stopit]

magpies said:

looking good there

couple of questions

I presume the earth from the starter button goes to the +ve side of the alternator warning light (will obviously illuminate when cranking) ?

I wish to have a warning light showing when the rad fan is working - activated by either the Otter switch or the dash override switch - Connected to the relay power to fan connection.

Starter button switches positive to the relay coil and the other end of the relay coil gets its earth from the alternator warning light wire which can be found at the instrument cluster rather than having to run a wire to the alternator

It's best to use a heavy duty relay for the starter circuit

See Topic - Starter Interlock Relay, Kill 3 birds With 1 Stone https://www.pistonheads.com/gassing/topic.asp?h=0&...



I am emailing you a fan circuit
Are my emails reaching you?

[magpies]

yes emails are good

[Penelope Stopit]

magpies said:

yes emails are good

OK now sent, I will be going out in a couple of hours, will visit back here in the morning

[Penelope Stopit]

I never did explain how the above circuit works....

There is a negative at the alternator warning light terminal when the engine is not running, once the engine is running the alternator warning light terminal becomes positive and prevents the starter relay from being operated

[Alan Whitaker]

Nice read Mick, Hope it's all coming together


PS Do you need another scoop making

Edited by Alan Whitaker on Thursday 6th December 10:31

[magpies]

Alan Whitaker said:

Nice read Mick, Hope it's all coming together


PS Do you need another scoop making

Edited by Alan Whitaker on Thursday 6th December 10:31

I'll see how the bonnet fits first. Probably about Easter

[magpies]

Hi Peny
Would it be normal to fuse the relay coil activation? Horn push / rad fan / starter button

[Penelope Stopit]

magpies said:

Hi Peny
Would it be normal to fuse the relay coil activation? Horn push / rad fan / starter button

Good question
If the car was owned by someone who was absolutely clueless I would consider wiring the horn push positive to a safety fuse in the same way as the heated screen switch is wired in the diagram
With you being the owner of the car I don't think you need a fuse because if the horn doesn't work when you hit the button you won't be keeping on the button and possibly burning a cable out if there was a short
The thing is that it is easy to use the same fuse that protects the heated screen switch cable to protect the horn push supply if you don't mind the horn being on ignition

As for the rad fan, you may find the thermo switch switches negative in which case a fuse isn't needed, if the thermo switch switches positive there should already be a fused supply to it*****Unless You Are Rewiring The Whole Car*****

About the starter button - Are you using a ignition switch? If the answer is yes then you could fit and wire 1 maxi fuse to protect the supply that comes from the fusebox area and runs across the dashboard to the ignition switch, it does need to be a maxi fuse because they are robust and if fitted it will also be protecting the ignition switched supply to everything else in the engine bay including the ignition coil/coils
The thing is, the same as the horn information above.....you won't be keeping the starter button pressed if it doesn't work straight away, in which case you won't be burning out a cable that has a possible short

Me................I have never ever fused a starter solenoid or ignition coil supply, I do the same as what you will be doing which is to run cables across the dashboard and to the coil/coils in the engine bay in a tidy fashion, positioned, sleeved and clipped so that they can't possibly rub or fall off and short out

Paranoia can set in with these loom jobs and we can easily start over-fusing if it does

Let me know if you are rewiring the whole car as I have drawn a diagram for a fusebox and relay job with some small dashboard wiring changes
I haven't got a clue what's under your bonnet

[GreenV8S]

Penelope Stopit said:

you won't be keeping the starter button pressed if it doesn't work straight away

You might well be if the starter fails to engage, which is a common problem with these cars.

[Penelope Stopit]

GreenV8S said:

Penelope Stopit said:

you won't be keeping the starter button pressed if it doesn't work straight away

You might well be if the starter fails to engage, which is a common problem with these cars.

I used the word "you" meaning magpies

Yes, I agree that the average punter could easily keep on the button for far too long and burn something out