Another Switchback problem has me stumped
Thread Starter
Instructor
Joined: Apr 2013
Posts: 114
Likes: 4
From: Lititz Pa
Another Switchback problem has me stumped
I have LEDs installed through out the car. Interior, tail lights and switchbacks in front. Had all the typical woes like hyperflash and dashlights acting weird. Installed resistors on all lights and installed diodes on signal leads. Thought I had solved everything and then I happened to see the driving lights in a shiney window. The problem I have hasn't shown up as far as I know so here goes. During daylight driving if I manually turn on DRLs they are fine....white, but if I have lights on auto with the ebrake OFF the lights are amber. If I pull the ebrake on they are off. Does any wiring guru have any suggestion how to have DRLs on white in auto?? I can't figure out what the ebrake has to do with driving lights. Since they are white when in manual DRL position that tells me they are operating right in that case. But I want to be in auto so I don't have to worry about lights. I know there is a harness being sold with a timer circuit but am not sure if that would work in my case. I have already isolated the lights from the BCM using the diodes. Any help would be greatly appreciated.
Rick
Rick
Thread Starter
Instructor
Joined: Apr 2013
Posts: 114
Likes: 4
From: Lititz Pa
This is a first for me
The forum has been the absolute best info source I have ever used. The guys here know their stuff so if this is a non starter it's not the forums fault. Funny I have seen so many weird problems from messing with the BCM that I'm sure eventually someone else will have this. Have ya heard the one from a guy that lost his cruise control when he added resistors? Nuts huh!?!
When I get it I will post the fix.... Thanks guys
When I get it I will post the fix.... Thanks guys
Pro
Joined: Mar 2008
Posts: 633
Likes: 13
From: Hurley New York
It's the way the bulb socket is wired. 2 wires/circuits.
Parking Brake on = DRL's off.
Brake off = DRL's Amber. There's a switch with the parking brake handle.
Headlights off = DRL's Bright Amber
Headlights on = DRL's Dim Amber or White with Switchback LED.
On your standard OEM 2 filament bulb. Circuit 1 sends power to DRL Amber Bright filament. Turn Signals send power to Circuit 1 Bright Amber filament too. When headlights are turned on the power is sent instead to Circuit 2 Amber Dim filament.
The Switchback LED bulb is a dual filament also just that the bright/dim sides are replaced with different colors. Bright Circuit 1 is the Amber side. The Dim Circuit 2 is the white.
Brake off = DRL's Amber. There's a switch with the parking brake handle.
Headlights off = DRL's Bright Amber
Headlights on = DRL's Dim Amber or White with Switchback LED.
On your standard OEM 2 filament bulb. Circuit 1 sends power to DRL Amber Bright filament. Turn Signals send power to Circuit 1 Bright Amber filament too. When headlights are turned on the power is sent instead to Circuit 2 Amber Dim filament.
The Switchback LED bulb is a dual filament also just that the bright/dim sides are replaced with different colors. Bright Circuit 1 is the Amber side. The Dim Circuit 2 is the white.
Last edited by ALS 08; Jun 27, 2015 at 02:25 PM.
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