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.

 

have you checked the ground circuit ? a poor ground make the lite have all kinds of problems..

 

Sounds like a voltage problem. 12 volt or 6 volt? If it's still a 6 volt system, is there any chance you're running 12 volt bulbs (like an 1157 instead of an 1154)?

 

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.

 

The truck is 6-volt negative ground. I have an alternator that starts charging at 300 rpm. Without a ground, there would be no lights. I am using 1154 bulbs. Thanks.

 

Are they the correct bulbs for that socket?

 

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.

 

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

 

How bright are your turn signals? The wires on my truck were crossed and it made my brake lights dim and my turn signals bright.

 

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

 

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

 

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

 

Chuck, WulleeBullee has the 6V neg. ground. Looks like 53pickemuptruck has the 12V problem with the Ron Francis Express Kit.

 

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