6v pos ground relay connections ??

[rcl700]

A little help please..

So I'm trying to wrap my mind around using relays for headlights and fog lights on my positive ground 6v car. 

Do I supply the relays with 6v neg. To the positive side of the relay and ground (+) to the ground side of the relay. 

 

I'm building a box to setup infrastructure of the battery. 

 

??

[Sniper]

There can be a snubber diode inside the relay box, that would make it polarity sensitive.  Since the picture relay doesn't specify any polarity sensitive connections I wouldn't worry about how it got wired.  Generally, if it has a diode it shows it like on this pic between 85 and 86

 

 

 

 

 

Edited September 22, 2023 by Sniper

[rcl700]

38 minutes ago, rcl700 said:

A little help please..

So I'm trying to wrap my mind around using relays for headlights and fog lights on my positive ground 6v car. 

Do I supply the relays with 6v neg. To the positive side of the relay and ground (+) to the ground side of the relay. 

 

I'm building a box to setup infrastructure of the battery. 

 

??

So....

85=trigger (-6v)switch (white)

86= ground  (+) (black)

30= input voltage (-6v) battery (blue)

87= output voltage (-6v)lights (yellow)

87a= not used

[Sniper]

You can wire it that way.

[rcl700]

Well this is what I ended up with. Thank you for your helpful input Sniper.

 

 

Edited September 22, 2023 by rcl700

[Sniper]

I was going to comment on lack of fusing.  Each blue wire should have it's own fuse to protect the circuit.  As it appears, you have all the battery - feeds to the relays going to the same bus and no circuit protection.  Or you could replace the blue wire with fusible links. 

Edited September 22, 2023 by Sniper

[rcl700]

My plan was to fuse the incoming 10gage wire from the battery supplying the upper bus bar (30A). Are you thinking each relay should be fused individually?

 

I'm learning, hang in there with me. 

[Sniper]

If you fuse the battery supply then any failure will render all the circuits dead.  If you fuse the individual relays then only the failed circuit is affected.

 

I assume these are for the headlights?  If so the high beams are usually on a self resetting circuit breaker rather than a fuse.

[lostviking]

Depends. Aren't you talking about the coils of the relays? The circuits they control would have their own fuse/circuit breaker.

[Sniper]

3 hours ago, lostviking said:

Depends. Aren't you talking about the coils of the relays? The circuits they control would have their own fuse/circuit breaker.

 

I think you need to reread what was posted and look very closely at how it was wired. 

[rcl700]

I have since added inline fuses to each of the blue wires tied to the negative bar. 

None of this has been installed. Im just getting wiring together and planning.  

Edited October 11, 2023 by rcl700