Having high beam switch control

[dewalt]

Lots of diodes in an old delco alternator. As well with a relay you can put a switch on the ground

 

[bwmiller74]

One clarification on your sketch...make sure the diodes are oriented to allow current flow from the combined (relay pin 87) side toward the individual lights, not vice-versa.

Just about any diode around 10-15a range with about 45V or more blocking voltage and a low resistance would work. These ones appear adequate.

https://www.amazon.com/gp/product/B00LQPMJAW/?tag=fordraptorforum-20


Caveat to all this: I’m not an electrical engineer or automotive expert!

---------- Post added at 02:36 PM ---------- Previous post was at 02:30 PM ----------

Whoops. No, I wouldn’t try powering that much off Aux2. I’d add the second relay powered/fused from the battery.

Thanks for the info NDO! If you have time can you give me another visual aid - lol. I work best of that.

 

[NDO]

Thanks for the info NDO! If you have time can you give me another visual aid - lol. I work best of that.

Here’s what I did on mine, almost identical to what you’re trying to do. Sorry they keep showing up sideways!

 

[bwmiller74]

Here’s what I did on mine, almost identical to what you’re trying to do. Sorry they keep showing up sideways!

I appreciate any and all the help! I made another sketch of my application and wondering if the wiring looks right? I purchased 30amp relays with built in fuses. Will those work or do I need an inline fuse before the the relay? Below is what I purchased.

Relays: https://www.amazon.com/gp/product/B071NNCF8Z/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

Diodes: https://www.ebay.com/itm/322928472771

 

[SpeedJunkie]

I appreciate any and all the help! I made another sketch of my application and wondering if the wiring looks right? I purchased 30amp relays with built in fuses. Will those work or do I need an inline fuse before the the relay? Below is what I purchased.

Relays: https://www.amazon.com/gp/product/B071NNCF8Z/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

Diodes: https://www.ebay.com/itm/322928472771

I'm not an expert on this stuff, so maybe I am wrong, but it looks to me like if you have AUX1 switched on and then hit your high beams that all of your lights will come on. I'm not sure that the diodes or other AUX switches really serve a purpose the way you have it set up.

This is the way I am looking at it:

AUX1 gets switched on, but relay is blocking power until relay is triggered.
High beams go on, trigger relay, which allows power to flow from AUX1.
Diodes look setup to allow power to flow to all lights from AUX1.

The other AUX switches really aren't doing anything. I think you are going to need more relays to make it work the way you want it to.

I have the same lights as you, but am going to make it a little simpler and just have the KC lights be simple on/off with the AUX switch. The other 2 sets of BD lights will have to have the AUX switch on and then high beams on to come on. I'm just going to tap the high beam wire and split it to each set of lights I want to control and go through a separate relay for each AUX switch.

The only thing I need is to know what wire on the 2018's. I have a message in to my Ford dealer to try and get the info from them. Will post when I find out as it seems nobody else knows.

 

[bwmiller74]

I'm not an expert on this stuff, so maybe I am wrong, but it looks to me like if you have AUX1 switched on and then hit your high beams that all of your lights will come on. I'm not sure that the diodes or other AUX switches really serve a purpose the way you have it set up.

This is the way I am looking at it:

AUX1 gets switched on, but relay is blocking power until relay is triggered.
High beams go on, trigger relay, which allows power to flow from AUX1.
Diodes look setup to allow power to flow to all lights from AUX1.

The other AUX switches really aren't doing anything. I think you are going to need more relays to make it work the way you want it to.

I have the same lights as you, but am going to make it a little simpler and just have the KC lights be simple on/off with the AUX switch. The other 2 sets of BD lights will have to have the AUX switch on and then high beams on to come on. I'm just going to tap the high beam wire and split it to each set of lights I want to control and go through a separate relay for each AUX switch.

The only thing I need is to know what wire on the 2018's. I have a message in to my Ford dealer to try and get the info from them. Will post when I find out as it seems nobody else knows.

Thanks for the input.
What I'm trying to accomplish is if AUX 1 is on and I hit highbeams all lights come on. I also want individual control of each light AUX 2-AUX4. So basically I can turn on each one whenever I want. For instance if I have AUX 1 on but not using my highbeams the lights are off, but I could also turn on AUX 2,3 or 4 and have those individual lights come on no matter the position of AUX1 (on/off).

 

[SpeedJunkie]

Thanks for the input.
What I'm trying to accomplish is if AUX 1 is on and I hit highbeams all lights come on. I also want individual control of each light AUX 2-AUX4. So basically I can turn on each one whenever I want. For instance if I have AUX 1 on but not using my highbeams the lights are off, but I could also turn on AUX 2,3 or 4 and have those individual lights come on no matter the position of AUX1 (on/off).

Ok, that makes more sense. It looks to me like that would work, except I don't think your diodes would protect your AUX switches the way you currently have them set up.

I think they should be between the AUX switch and where the power from AUX1 splices in, and they should be allowing power flow towards the light. In other words, the diode should be on the red lines you drew, not the blue, and pointing towards the lights.

The way I see it now AUX1 could still send power to your other AUX switches.

 

[bwmiller74]

Ok, that makes more sense. It looks to me like that would work, except I don't think your diodes would protect your AUX switches the way you currently have them set up.

I think they should be between the AUX switch and where the power from AUX1 splices in, and they should be allowing power flow towards the light. In other words, the diode should be on the red lines you drew, not the blue, and pointing towards the lights.

The way I see it now AUX1 could still send power to your other AUX switches.

I was wondering about that after your comments. Wouldn't I have to leave the original diodes as well, in case I power the lights from AUX2-4? Here is another sketch with the added AUX2-4 diodes. So I think I would need a total of 6 diodes for this setup. Hopefully I'm along the right path here.

Any thoughts on the fused relay or do I need to have an inline fuse before the relays?

Thanks for all your guys help!

 

[SpeedJunkie]

I was wondering about that after your comments. Wouldn't I have to leave the original diodes as well, in case I power the lights from AUX2-4? Here is another sketch with the added AUX2-4 diodes. So I think I would need a total of 6 diodes for this setup. Hopefully I'm along the right path here.

Any thoughts on the fused relay or do I need to have an inline fuse before the relays?

Thanks for all your guys help!

Good call. Yes you are right about leaving in the original diodes as well.

Sorry, I don't know much about fused relays. I assume that you wouldn't need an inline fuse and that you could just do either or. My relays don't have fuses built in so I just bought one of these: https://www.amazon.com/dp/B01E5MM63C/?tag=fordraptorforum-20

 

[bwmiller74]

Do guys you think I could use these kind of diodes?

https://www.amazon.com/AKOAK-Schottky-Blocking-Diodes-15SQ045/dp/B01CXOQMJ8/ref=sr_1_3?ie=UTF8&qid=1516220114&sr=8-3&keywords=dc+diode