NCT wire from battery/fuse fail???

Damokc

Took the car for NCT today without doing anything for it beforehand as I just wanted to know the major things that needed to be done because I was thinking the worst. Turned out not to be too bad.

One of the things which I was thinking that would show up (as I was told) did. An aux wire running from the battery for spot lights I fitted myself.
The failure was dew to not having a fuse on it. Thing is I have a fuse on it. An inline fuse behind the dash before it goes to the relay.
Could I just show them this the next time OR does the fuse have to be in the engine bay? I actually bought an inline mini blade fuse holder today just in case.

langdang

But the power for the spots doesn't go through the switch? Only the signal for the relay. You need an inline fuse between the battery and the spots. I'd put it as close as is practical to the battery.

Damokc

This is the way I have it. so your just saying to move it as close to the battery as possible? I thought the way I had would be better as it would stay dry and stuff.


The more I think about it, its only common sense that the "safety device" should be out of the cabin.

johnayo

Damokc wrote: »

This is the way I have it. so your just saying to move it as close to the battery as possible? I thought the way I had would be better as it would stay dry and stuff.


The more I think about it, its only common sense that the "safety device" should be out of the cabin.

You should have a fuse close to the battery. This will prevent Wire burning in the event of short circuit between battery and relay.

Sorry, Langdang got in ahead of me.

CiniO

johnayo wrote: »

You should have a fuse close to the battery. This will prevent Wire burning in the event of short circuit between battery and relay.

Won't the fuse located like on the picture not prevent is as well the same good?

johnayo

CiniO wrote: »

Won't the fuse located like on the picture not prevent is as well the same good?

Not if the wire shorted between the battery and the fuse.

Damokc

CiniO wrote: »

Won't the fuse located like on the picture not prevent is as well the same good?

I suppose the "firewall" is called that for a reason? I should have the fuse outside that to prevent the cabin going on fire. I now see the light!

Is it OK to have the relay inside the car though? it should be right? Once the fuse is in the engine bay?

Avns1s

johnayo wrote: »

Not if the wire shorted between the battery and the fuse.

Precisely.

Bring that inline fuse as close to the battery as is possible. You should be fine and then it will be relatively safe. It's a fire waiting to happen as it is.

langdang

Thought you had a switch when you mentioned bringing things inside the firewall. I'd move the relay and the power cable into engine bay. Maybe you have other wires coming in for the relay which could be used for putting a switch in the circuit - you don't always need fulls AND spots!

Damokc

langdang wrote: »

Thought you had a switch when you mentioned bringing things inside the firewall. I'd move the relay and the power cable into engine bay. Maybe you have other wires coming in for the relay which could be used for putting a switch in the circuit - you don't always need fulls AND spots!

I actually never use them really. They are on their own stand alone switch. They just look good even when off!LOL:o

CiniO

Damokc wrote: »

I actually never use them really. They are on their own stand alone switch. They just look good even when off!LOL:o

Just for curiousity what are the spot-lights?
I've heard that expression many times here, but I never seen anything like that.
What are they and what are they supposed to be used for?

As when I hear spot-light I'm thinking about something like that:

langdang

What's going through the switch - power from the battery or a small signal wire tapped off the full beams? ( if it's actual spots, some people call fogs spots too. Or call fogs parking lights if they have a BMW)

Damokc

langdang wrote: »

What's going through the switch - power from the battery or a small signal wire tapped off the full beams? ( if it's actual spots, some people call fogs spots too. Or call fogs parking lights if they have a BMW)

Theres power (fused) from the battery going to a relay then a signal going from the relay to the switch. Thats the way its supposed to be as far as is I know.

langdang

Signal goes TO the relay, I suppose you could latch it off itself, but really the control signal should come from full beams or parking lights depending what you are wiring.

Cinio, spots are for real men, fogs are for posers ;-) Spots shine a long narrow beam and should only come on with full headlights, fogs should have a low wide shorter beam, but many seem to cause a lot of glare, especially on wet (but not foggy) nights

Damokc

by right it should be, that way they would go off when the high beam goes off.