Headlight relay buzzing
JK Freak
Joined: Dec 2007
Posts: 714
Likes: 0
From: Daytona, FL.
It was here now it's gone 
maybe someone had a liability issue
dsy had posted it on page 2
Last edited by renegadelt1; Sep 23, 2008 at 07:53 AM.
JK Newbie
Joined: Oct 2008
Posts: 10
Likes: 0
From: Vancouver, BC
Just wanted to add my $.02 to this thread;
I just installed a set of HID headlamps and Foglights from XenonWorx in my '08 Rubi Unlimited. Their kit is the bulb-replacement type that use the factory reflectors, and the Hi-beams actually cause the bulbs to move in their socket to change the reflection angle.
They came with a harness that seemed to include a "Can-Bus fix" circuit, as the harness has its own power & ground leads, as well as a "little black box" in the middle of the harness. Sure enough, when Iplugged it all in, the ECU was happy, but the little black box buzzed when hi-beams were activated while the motor was running.
I was able to fix the buzz by simply putting a 25v 100uF Capacitor across the hi-beam & neutral leads of the OEM light connector - in Parallel with the rest of the HID harness. If I used any higher a value capacitor, the buzz still stopped, but there was a perceptible delay (>2s) between turning off the highbeam switch, and the beams actually turning off. I didn't go any lower than 100uF. There's still a 'delay', but it's in the order of 300ms.
Just thought that this might help anyone else who reads this thread. (Because I didn't have an obvious automotive relay in my HID harness, nor did I want to throw it away.)
I just installed a set of HID headlamps and Foglights from XenonWorx in my '08 Rubi Unlimited. Their kit is the bulb-replacement type that use the factory reflectors, and the Hi-beams actually cause the bulbs to move in their socket to change the reflection angle.
They came with a harness that seemed to include a "Can-Bus fix" circuit, as the harness has its own power & ground leads, as well as a "little black box" in the middle of the harness. Sure enough, when Iplugged it all in, the ECU was happy, but the little black box buzzed when hi-beams were activated while the motor was running.
I was able to fix the buzz by simply putting a 25v 100uF Capacitor across the hi-beam & neutral leads of the OEM light connector - in Parallel with the rest of the HID harness. If I used any higher a value capacitor, the buzz still stopped, but there was a perceptible delay (>2s) between turning off the highbeam switch, and the beams actually turning off. I didn't go any lower than 100uF. There's still a 'delay', but it's in the order of 300ms.
Just thought that this might help anyone else who reads this thread. (Because I didn't have an obvious automotive relay in my HID harness, nor did I want to throw it away.)
JK Junkie
Joined: Feb 2008
Posts: 2,071
Likes: 2
From: Nampa, Idaho
Just wanted to add my $.02 to this thread;
I just installed a set of HID headlamps and Foglights from XenonWorx in my '08 Rubi Unlimited. Their kit is the bulb-replacement type that use the factory reflectors, and the Hi-beams actually cause the bulbs to move in their socket to change the reflection angle.
They came with a harness that seemed to include a "Can-Bus fix" circuit, as the harness has its own power & ground leads, as well as a "little black box" in the middle of the harness. Sure enough, when Iplugged it all in, the ECU was happy, but the little black box buzzed when hi-beams were activated while the motor was running.
I was able to fix the buzz by simply putting a 25v 100uF Capacitor across the hi-beam & neutral leads of the OEM light connector - in Parallel with the rest of the HID harness. If I used any higher a value capacitor, the buzz still stopped, but there was a perceptible delay (>2s) between turning off the highbeam switch, and the beams actually turning off. I didn't go any lower than 100uF. There's still a 'delay', but it's in the order of 300ms.
Just thought that this might help anyone else who reads this thread. (Because I didn't have an obvious automotive relay in my HID harness, nor did I want to throw it away.)
I just installed a set of HID headlamps and Foglights from XenonWorx in my '08 Rubi Unlimited. Their kit is the bulb-replacement type that use the factory reflectors, and the Hi-beams actually cause the bulbs to move in their socket to change the reflection angle.
They came with a harness that seemed to include a "Can-Bus fix" circuit, as the harness has its own power & ground leads, as well as a "little black box" in the middle of the harness. Sure enough, when Iplugged it all in, the ECU was happy, but the little black box buzzed when hi-beams were activated while the motor was running.
I was able to fix the buzz by simply putting a 25v 100uF Capacitor across the hi-beam & neutral leads of the OEM light connector - in Parallel with the rest of the HID harness. If I used any higher a value capacitor, the buzz still stopped, but there was a perceptible delay (>2s) between turning off the highbeam switch, and the beams actually turning off. I didn't go any lower than 100uF. There's still a 'delay', but it's in the order of 300ms.
Just thought that this might help anyone else who reads this thread. (Because I didn't have an obvious automotive relay in my HID harness, nor did I want to throw it away.)
JK Freak
Joined: Mar 2008
Posts: 783
Likes: 3
From: Southeast
Not having anything around to build a harness for the Cibies and 80/85 watt bulbs I just ordered the Susquehanna Motorsports harness specifically designed for this conversion, and it works perfectly.
JK Newbie
Joined: Feb 2009
Posts: 10
Likes: 0
From: Sherwood Park, AB
Just as a quick note:
The diagram specifies a 220pF Capacitor and that is likely a misprint. It should be 220uF. 220 picoFarads are not polarized and are much to small for this application, the 220 microFarad seems more in-line with reality and they are polarized.
BTW: Nice write up !
The diagram specifies a 220pF Capacitor and that is likely a misprint. It should be 220uF. 220 picoFarads are not polarized and are much to small for this application, the 220 microFarad seems more in-line with reality and they are polarized.
BTW: Nice write up !
JK Enthusiast
Joined: Mar 2009
Posts: 104
Likes: 0
From: abingdon, va
Thanks for the write up I've got to do this I have kc daylighters doing the same thing, I connected onto the high beam wire at the light and went to the relay mounted on the firewall beside the battery.
JK Enthusiast
Joined: Apr 2009
Posts: 148
Likes: 0
From: Miami, FL
does anyone know if the capacitor trick is needed with the factory foglights as well? . . . I need to switch my recently purchased ballasts with digital ones (which I am told by galmax will work with the canbus system) and need to know if I need to switch boith sets or just one.
JK Newbie
Joined: Aug 2008
Posts: 2
Likes: 0
From: LPPR
Relay with diode
Would a micro relay with diode protection avoid the need to solder one on the cable coming from the high beams?
I have 4 hellas FF75 to install on my roof rack, I'm trying to keep it as simple as possible...
I have 4 hellas FF75 to install on my roof rack, I'm trying to keep it as simple as possible...
JK Enthusiast
Joined: Apr 2009
Posts: 148
Likes: 0
From: Miami, FL
In theory yes . . . if they have one rated for enough amperage. I wouldnt go less than 30 or 40 amps . . which is why the standard 5 pin Bosh Relays are so popular I think.