Relay Chatter When Wiring to Dome Light

Looking for some professional help here. I wired up some rock lights under the body of my truck. At first wired to just a switch. Now I'd like to wire it up to the domelight and have succeeded. The dome light uses a switched ground. So I wired up a relay with some help from searching this forum. However I am getting some relay chatter still that is very annoying.

Below is the first configuration with the switch only.



Next is the configuration that is giving me the chatter but WORKS.



Here is my current configuration where i wired in a capacitor and a diode to try and eliminate the chatter. The chatter seems to be less now and sometimes it doesnt even do it... Not sure where I went wrong.



Any ideas from the experts?

What is the point of the relay if you aren't using its contacts to feed the "rock lights"?

Why does 87 not go to the "rock lights"?

I am using the relay to handle the negatively switched domelight.

I want the setup to work two ways.
1)Switch Operated (On-Demand)
2)Whenever the domelight is on they turn on.

I used information from this link to get this far.

https://www.the12volt.com/relays/page1.asp

After 2nd coffee, it looks logical. The relay drop-out voltage is quite a bit lower than the pull-in voltage so either there is a lot of drop due to current draw of your lights or something amiss with the output of the 4x4 switch. What is the model number of that switch?

Try putting a suppression diode across the relay coil.

I have gone back over everything and confirmed wiring per the above diagram. As mentioned above the setup does have significantly less chatter (like a half second) than it did at the beginning. I have no idea what to do at this point....

Switch - Rated at 3A 12V - https://www.ch4x4.com/product/ch4x4-toyota-push-switch-rock-lights-symbol-4/
Rock Lights - 9W - https://www.amazon.com/gp/product/B01ABPGAUC/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
Diodes - 1N4006 Rectifier Diode 1A 800V - https://www.amazon.com/gp/product/B00DYFH3M6/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
Capacitor - 1000uf 25v - https://www.amazon.com/gp/product/B06WGPNM19/ref=oh_aui_detailpage_o05_s00?ie=UTF8&psc=1

Have not tried suppression diode? Should I be trying that? Was not sure how to wire that up properly in the current configuration, and honestly never heard of one.

Thanks in advance guys, I'd really like to get this nailed down.

In conjunction with what I have said above.

I would also like to point out that I have tried disconnecting the switch it self (pulled the harness off the back) and still get the buzz.

Capacitor across 85 and 86.

Additional capacitor across 85/86?

Or change it from 85/87 to 85/86

Lose the capacitors. They shouldn't be necessary. Measure the voltage across the relay coil.

EDIT: Does your dome light gradually dim before it goes off entirely?

Yes it does. Probably sends a pulsed ground signal which is the cause of the relay chatter to begin with...

The capacitor was supposed to counter this, and does... Just not fully.

Before chatter was about a second and a half, now its roughly a half second. I'd like to eliminate this entirely.

You are sending a pulsed ground to a coil and magnetic switch. Capacitor should be on the 85 and 86 to smooth out the dome light circuit ground dimming pulse. A diode may also be needed to keep the capacitor from back feeding the dome light circuit ground. Band towards the vehicle side. If the lights stay on to long after the dome circuit goes off use a smaller value capacitor.

i am an idiot wrote:

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Capacitor across 85 and 86.

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Agree.
Changing the capacitor to be across the coil (85-86) should improve ir.