A Brazilian tries to build an 80! (1 Viewer)

[250below10]

I believe you also want to power the relay with an key on source (ACC/On).

Yeah, your idea would work if I had explained the problem correctly


What is actually happening is that the high beams see 12v+ when the low beams are on and then see ground when the either the high beams are on or when low beams are off (if that makes sense)
So basically if you use the ground side of the relay as a switch, the relay clicks ON when everything is off, then clicks OFF when low beams are on, then ON again when high beams are on.

I thought I could just power the relay from the positive on the low beams side of the circuit, since they are positive switched. But could not make it work either.

The more I type the more confused I get, probably gonna leave this one alone for a couple days.

 

[NeverFinis]

I just did this on my LX450, which is what I think you are trying to do: Builds - LX450 "Rex" Build - https://forum.ih8mud.com/threads/lx450-rex-build.1254004/post-15868347

I have aux bumper lights that can only come on with high beams. There is also a dash switch to turn them off, even with high beams are on.

Also, your aux lights might be grounded to the chassis, grounding the entire circuit if you are running a ground wire from the relay to your aux lights.

Rereading my post..not sure I explained how I did it very well.. I can check all the connections tomorrow...

 

[250below10]

I just did this on my LX450, which is what I think you are trying to do: Builds - LX450 "Rex" Build - https://forum.ih8mud.com/threads/lx450-rex-build.1254004/post-15868347

I have aux bumper lights that can only come on with high beams. There is also a dash switch to turn them off, even with high beams are on.

Also, your aux lights might be grounded to the chassis, grounding the entire circuit if you are running a ground wire from the relay to your aux lights.

Rereading my post..not sure I explained how I did it very well.. I can check all the connections tomorrow...

I think my set up might be weirder than the rest.
All I want to accomplish with this is to get a 12v+ signal out when the high beams are on. This will not power or trigger the actual aux lights.
I just need the signal to tell my switch control when the high beams are on.

 

[NeverFinis]

Are you using a 4 pin relay? or a 5 pin relay? It is it normally open or normally closed?

I think you should be using a 4 pin relay, normally open.

You want the coil GND, Relay pin 86, to be from the high beam GND
You want the coil +12V, Relay pin 85, to be from the high beam +12V, after the headlight relay.

You can also use the high beam +12V for the signal wire, Relay pin 30.

Then pin 87 should carry +12V to your switch control when the high beams are on.

 

[250below10]

Are you using a 4 pin relay? or a 5 pin relay? It is it normally open or normally closed?

I think you should be using a 4 pin relay, normally open.

You want the coil GND, Relay pin 86, to be from the high beam GND
You want the coil +12V, Relay pin 85, to be from the high beam +12V, after the headlight relay.

You can also use the high beam +12V for the signal wire, Relay pin 30.

Then pin 87 should carry +12V to your switch control when the high beams are on.

Yeah, 4 pin relay, normally open.

Ill give this a go and see if it works!

 

[250below10]

Went to HF last night and got my new lighs

Got started on the harness. A bit overkill but all I had in the proper colors was 12awg. Hopefully I can finish and test it out tonight

Maybe tomorrow Ill go back to the high beam signal battle

 

[250below10]

Crappy pic but got the wiring done last night.

Those are just with the running lights.
I never had or seen in person any high end aux lights but I cant imagine needing more than what those HF put out, those things are BRIGHT!

 

[250below10]

Are you using a 4 pin relay? or a 5 pin relay? It is it normally open or normally closed?

I think you should be using a 4 pin relay, normally open.

You want the coil GND, Relay pin 86, to be from the high beam GND
You want the coil +12V, Relay pin 85, to be from the high beam +12V, after the headlight relay.

You can also use the high beam +12V for the signal wire, Relay pin 30.

Then pin 87 should carry +12V to your switch control when the high beams are on.

I was rereading this and thinking about it
Couple things
Do you mean pin 85 for ground and 86 for +12V? And would it work either way? As long as it is closing the circuit?

Second thing
So, high beams has a red/yellow wire and a red/white wire, and when I probe them with the high beams on, they are both just grounds. I tried tapping red/yellow to pin 85 and red/white to pin 86 and it did not work

Im starting to think this might be above my pay grade

 

[NeverFinis]

I was rereading this and thinking about it
Couple things
Do you mean pin 85 for ground and 86 for +12V? And would it work either way? As long as it is closing the circuit?

It doesn't matter. Either can be used for ground and the other for power.

Second thing
So, high beams has a red/yellow wire and a red/white wire, and when I probe them with the high beams on, they are both just grounds. I tried tapping red/yellow to pin 85 and red/white to pin 86 and it did not work

Im starting to think this might be above my pay grade

According to my EWD, R-Y is after the high beam lights, and should have continuity (near or at 0 Ohms) to ground with the high beam lights on.

R-Y is what you should be using for ground for your relay coil.

R-W is before the high beam lights, should read a higher than 0 Ohm resistance with the high beams on. The resistance to ground should be the resistance of the light filament.

R-W is what you should be using for power for your relay coil.

 

[NeverFinis]

Also, depends on which side you are working on.

R-W for Right high beam headlight
R-L for Left high beam headlight

I am actually using R-L for power for the coil as my relay is on that side.

 

[250below10]

Huh, weird
I was using red/yellow to my 85, and doing a jumper from red/white to 86 and 30. Maybe that is my problem.
Later today Ill try to do r/y to 85, r/w to 86 and do a fused connection to 30 from a constant 12v source and see if that works

 

[250below10]

Well,
Im not sure who is keeping tabs, but once again, I was just being dumb.
We were all right from the beginning!
R/Y for ground and R/W(blue in my case with an LX) on 86 and 30 works.
I ended up having bad t-taps
Changed them up and mot it works

 

[NeverFinis]

Great.

The L in R-L is Light Blue. R-L is the +12V for the Left Hand Lights.

 

[250below10]

Great.

The L in R-L is Light Blue. R-L is the +12V for the Left Hand Lights.

The more you know!!!
Thanks for all the help!

 

[250below10]

Had some free time today and got to clean some more old wiring.

I installed this split fuse box a few years ago to have a better access to ACC ON power. It is connected via a 120amp relay.


I printed a mounting plate and got it rewired

I also ran some 6awg to the secondary battery. Before it was getting power from the starter battery.

 

[250below10]

Went to Tahuya again to crash a FJ run with a couple other 80s!