Brake lights not brighter
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Mountain Pass
Joined: Feb 2010
Posts: 101
Likes: 14
From: Diboll, Texas
Brake lights not brighter
I rewired a 7-wire turn signal switch on a 51 as per 'Julie". It is not a Signal Stat, but is not a repop. Everything works, except when I have headlights on and brakes there is no difference in intensity. I have brake lights alone. I have running lights alone. They are activating separate elements in the bulbs. When running lights, turn signal signal, and brakes are applied, you can't tell the brakes are on, unless you take off the lens. Both elements are on. The brakes alone are dim, until the signal switch is turned either way and then they are bright along with either turn signal. I'm baffled.
Last edited by wulleebullee; Oct 23, 2011 at 08:52 AM. Reason: additional info
Laughing Gas
Joined: Jan 2008
Posts: 758
Likes: 0
From: Alabama
I had a similar problem putting some turn signals on the wifes muddin Jeep. I finally figured it out and I had the wires crossed that went to the brake lights and the turn signals. Swapped the wires around and everything worked like it was suppose to. Not sure thats your problem but something to look at.
Laughing Gas
Joined: Apr 2009
Posts: 751
Likes: 1
From: orange county, ca.
are the running lights alone as bright as the turn signals alone. you might be turning on the bright filament with the running lights and then the dim filament with the brake lights. the brake lights and turn signals should be on the same wire to the taillights, check it with a test light at the socket.
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Logistics Pro
Joined: Oct 2002
Posts: 4,489
Likes: 5
From: Valley Center, CA
I have to say that it's either the ground or the voltage. Please keep in mind that it's easy to check either. While the brakes are applied, just connect an extra ground wire to the back of the light on some bare metal. Then run a temp fused line strainght from the battery and connect to the bulb wire.
My gut tells me that you have too small of wire to allow the 6 volts to get all the way back there.
Good luck and let us know what you fiond for a fix so that we have closure on the post.
Jag
My gut tells me that you have too small of wire to allow the 6 volts to get all the way back there.
Good luck and let us know what you fiond for a fix so that we have closure on the post.
Jag
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Elder User
Joined: May 2006
Posts: 907
Likes: 1
From: Kansas City, Mo
You said 6vdc neg ground? It was always suggested to me that you can't have to many grounds. Like batt to engine. Batt or engine to frame, cab to frame, bed to frame. You can always check grounds, one at a time with a good set of large wire jumper cables. chuck
Last edited by 49fordpickumup; Oct 24, 2011 at 10:28 PM. Reason: correction
Senior User
Joined: Feb 2007
Posts: 467
Likes: 0
From: White Hall , Illinois
I'm having problems with my tail lights also 12 Volt hooking up to a Ron Francis Express kit.They are a small rectangle with red lenses and a billet face , recessed into my roll pan. Came from Dan Carpenters as a kit,said he couldn't help me. Anyone ever wire these up? Turn signal, running light, and brakes. There are three bulbs in each one.There is a short brown wire coming out of the casing,with three long wires, black with green stripe,black with a yellow stripe and an all black wire. Where's a Julie,when ya need one! I'm not much on wires yet.If anyone could direct me I would be
Elder User
Joined: May 2006
Posts: 907
Likes: 1
From: Kansas City, Mo
Help. You previously said 6VDC neg ground and alternator. Then you said you were using 1154 6VDC bulbs. Now were are talking rear harness 6 0r 12vdc another harness? Please straighten us what you have. I know it's confusing. APPLES/oranges to start.( For 12vdc battery, neg ground) With the tail light harness, (if you can't visually see the case ground wire) use a ohm meter, remove the bulbs and check each wire to the case to find ground wire. Next install the bulbs. Apply proper voltage 12vdc to each power wire and batt ground to the case wire. The wire that provides the brightest light is the brake light. The other is the tail light. I hope this is what you need to start. chuck
Elder User
Joined: May 2006
Posts: 907
Likes: 1
From: Kansas City, Mo
Thanks, your right,I 'm not. First time I had seen a 6VDC neg gnd with a alternator and then I was side tracked. A case of CRS, can't remenber --it . chuck
Last edited by 49fordpickumup; Oct 26, 2011 at 09:28 PM. Reason: addition
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