Right rear brake light / turn signal.

[Rocky646260]

I was wondering if anyone could help me solve this issue with my 1986 Bronco.

ALL NEW BULBS.

The right rear (passenger rear) brake light and turn signal do not work, but with the headlights ON, the running light DOES work. At first every light on the passenger side of the vehicle was goofy, the headlight was way dim, but I read somewhere online to hardwire the ground to the battery (which did work) and all the light on the front side now work just fine.

A little more detail, with the hazard lights on the lights all do still work, except the right rear.

The bulb is new, and to be sure it wasnt a faulty bulb, I got another new one and it was a no go.

Any help / suggestions would be greatly appreciated and thanks in advance.

 

[fyreduck1921]

I believe that the Brake / Turn signal is on a different wire than the running / tail-light. Sounds like a bad or loose wire. An option to test it is take out the bulb and use a multimeter to test for power coming to the socket.

 

[Rocky646260]

I believe that the Brake / Turn signal is on a different wire than the running / tail-light. Sounds like a bad or loose wire. An option to test it is take out the bulb and use a multimeter to test for power coming to the socket.

Do you know which of the 3 wires coming out of the tail light is the ground? And am I able to ground to the truck body? I really should get a test light.

I really think it may be a ground because the truck had a battery fall over and it took out a few ground wires.

 

[love_my_bronco]

i have an 83 bronco. my problem is all the lights work but when i apply the brakes the lights dont get brighter like they should and my turn siganals dont blink.. any help on this one guys?

 

[BroncoJoe19]

i have an 83 bronco. my problem is all the lights work but when i apply the brakes the lights dont get brighter like they should and my turn siganals dont blink.. any help on this one guys?

Do your front turn signals work?

Did you check your bulbs?

 

[shift1313]

i had a problem on my 85 where i would get turnsignals that didnt work sometimes. i traced it down to my ignition switch. the remote switch thats mounted farther down on the steering colum was not getting fully returned to the "run" position because of the spring in the actually key switch. to get my signals to work i would have to turn the key back slightly.

Just to help things out, when your bulbs go out your TS will flash faster. so say your right rear goes out, your right front should flash double time and you will notice this on the in dash indicator. atleast thats what mine have always done.

 

[Justshootme84]

Do you know which of the 3 wires coming out of the tail light is the ground? And am I able to ground to the truck body? I really should get a test light.
I really think it may be a ground because the truck had a battery fall over and it took out a few ground wires.

The black wire is usually the ground, and double-checked that in the wiring diagram.

 

[love_my_bronco]

Do your front turn signals work?Did you check your bulbs?

yea bulbs are just fine like i said all the lights work all my bulbs are fine but the brake lights dont get brighter when iput on the brake and my turn siganals dont blink.

 

[BroncoJoe19]

yea bulbs are just fine like i said all the lights work all my bulbs are fine but the brake lights dont get brighter when iput on the brake and my turn siganals dont blink.

I'm sorry, I don't know what your level of mechanical abilities are, or what tools you have.

I also do not know exactly what the light set up is for brakes and directionals for an 83. I have a '90, and frankly didn't go outside and pull anything apart to look. SO here you go.. me shooting from the hip.

It is quite possible that the tail light has a two filament bulb, which is like two lights in one. If so it is an 1157 bulb. The one filament would be for your running lights, and the other for brakes and directionals. WHen you depress the brakes, or put on your turn signals the second filament glows making the one bulb twice as bright.

IT is possible for only one filament to burn out while the other works. IT is quite possible a bilateral problem (a bad bulb on both sides).

OTOH, poor connections within the bulb socket could also be the problem. To examine either, you should pull the lens covers off.

Sometimes the directional light is a completely separate bulb. It is possible that there are bad connections at the socket, or the bulbs are burnt out.

Another possible locaation of a problem (and again, I don't know if broncos have this) there is often a brake light switch mounted under the dash so that it touches the brake pedal lever when your foot is not on the pedal, but when you depress the pedal away from the switch, the switch makes contact and turns on the brake lights.

Other than examining the bulbs for breaks in the filaments, or looking at the contacts, you will need a continuity / volt meter to check the circuits further.

If your directionals to the front works, that kinda rules out a directional switch problem, (but not necessarily)

 

[love_my_bronco]

ok i just looked it is a dual filament bulb the connections are fine im sure and running lights work fine what i was just told not to long ago is that the flasher fuse suposedly a big silver round fuse could control both my turn siganals and brake light so when i turn on the turn siganal they flash and it brighten my tail lights when brakes are applied. does that soud like a possiblity to you or is someonepulling my leg?

 

[BroncoJoe19]

ok i just looked it is a dual filament bulb the connections are fine im sure and running lights work fine what i was just told not to long ago is that the flasher fuse suposedly a big silver round fuse could control both my turn siganals and brake light so when i turn on the turn siganal they flash and it brighten my tail lights when brakes are applied. does that soud like a possiblity to you or is someonepulling my leg?

On my truck, under the dash, there is a decal labeling the locations of the fuses in the fuse panel. I guess it is possible that the front and rear directionals are on different fuses. There may well be a round thing in the fuse panel, or near it that makes the clicking sound when your blinkers are on. That is called the flasher. Hmmm I seem to recall that they could sometimes be rather squarish also, but at any rate about an inch by and inch. I *think* those things are either good or bad. And if your front blinkers are working, I think it is good.

Now.. you're sure that both filaments in the bulbs are good. Hold it to the light, and flick it with your finger, to see if one of the wires is broken, or take it to a parts store and ask them to check it for you.

 

[love_my_bronco]

i work on in a electronics shop so yea im sure the lights are fine. no non of the lights blink and my tail light wont brighten when brakes are compressed im gonna change that fuse and see what happens thanks again if i still have problems ill post it!

 

[BroncoJoe19]

i work on in a electronics shop so yea im sure the lights are fine. no non of the lights blink and my tail light wont brighten when brakes are compressed im gonna change that fuse and see what happens thanks again if i still have problems ill post it!

Hey,

I just noted that in another thread you stated that your blinker lights come on but don't blink.

I realize that you did not start THIS thread, but the title refers to the rear, not all of the blinkers, and that threw me off.

You are most likely looking to replace Your FLASHER (it is not a fuse)

It should look something like this...

http://www.autozone.com/R,APP1218504/vehic...oductDetail.htm

Now... If you replace your flasher, and your blinkers still come on but do not blink take note of exactly which ones come on, and which ones do not. And let us know.

Good luck

joe

 

[shift1313]

maybe i misread this earlier. i thought you had trouble with the flashers not the brake lights. the flasher relay is the green round relay, 83 will be the same relay as the 90, just different location. all the signals are/should be fused together with the hazzards but i think the hazzards on the 86 have a seperate fuse as well.

do your flashers still work when you press the brake pedal or do they stop flasshing?? do your hazzards work?

the only thing that controls your high filament on the bulb is the brake light switch mounted on the brake pedal bracket just below the pivot and the turn signal/hazzard switch. its is possible to adjust the brake light switch. if for some reason it is out of adjustment you can bend the bracket. if the switch doesnt trigger the brake lights you will probably have to replace it. to test you can unplug the switch and jumper the two wires together and this should make your brake lights come on.

as far as the wiring goes. ltgrn-orange will be your ts and your brake light(high filament). brown will be the running light/ power to your tag light. and blk/brn will be the ground. i think the turn/hazzard fuse(#1) is the same as the brake light.

when they dont work next time try jiggling the key around a bit and see if maybe your key return spring is worn out. the remote switch block mounted to your steering column could come loose.

i hope this gives you something to look for.

 

[love_my_bronco]

Hey,I just noted that in another thread you stated that your blinker lights come on but don't blink.

I realize that you did not start THIS thread, but the title refers to the rear, not all of the blinkers, and that threw me off.

You are most likely looking to replace Your FLASHER (it is not a fuse)

It should look something like this...

http://www.autozone.com/R,APP1218504/vehic...oductDetail.htm

Now... If you replace your flasher, and your blinkers still come on but do not blink take note of exactly which ones come on, and which ones do not. And let us know.

Good luck

joe

this thread is labled brake lights and turn siganals and thats what the problem is. my turn siganals dont flash and my brake lights dont get brighter when brakes are applied. all the lights come on so every light works but when i apply brakes the tail lights dont get brighter and when i use my turn siganal it doesnt flash it just stays solid. i changed the hazard and flasher. the battery is out right now but ill put it in today and see what happens.

 

[BroncoJoe19]

this thread is labled brake lights and turn siganals and thats what the problem is. my turn siganals dont flash and my brake lights dont get brighter when brakes are applied. all the lights come on so every light works but when i apply brakes the tail lights dont get brighter and when i use my turn siganal it doesnt flash it just stays solid. i changed the hazard and flasher. the battery is out right now but ill put it in today and see what happens.

Hey... I'm just trying to help.

"Right rear brake light / turn signal., Running lights work, the rest.. don't."

This title had me thinking that the problem was only in the rear.

Not a big deal, what we are all trying to do is to get your lights working properly.

IF when you replace the battery later today, and IF it still doesn't work, then please put your left directional on, and see if the left front blinker gets brighter, and if the left rear blicker gets brighter, and note it and let us know.

THEN... do the same thing on the right side.

TTYL

joe

 

[love_my_bronco]

thanks everybody yea im gonna put the battery in soon. umm i reread what ive been typeing and i relize i knida came off as in ass im sorry about that didnt mean any hard feelins at all not mad or fusterated. and i respect and greatly accept the help you guys are offering sorry to come off mad i never was. on another note someone told me that the brake light switch located on the brake pedal could be out so my question is how offten do these go out?

thank you and again im sorry.

 

[BroncoJoe19]

<snip> someone told me that the brake light switch located on the brake pedal could be out so my question is how offten do these go out?

In posts #9 and #14 of this tread mention was made of the break light switch, #14 even mentioned that it may be adjusted.

With that said. All of the contacts and switches in this truck are 15 years old, and by then switches and contacts often start to get a little or a lot oxidized, and they start loosing connections.

The break light switch is a simple two prong switch. Just disconnect it, and run your continuity tester across the poles, with the button in and out. One (the button in) should give you an open circuit, the other (the button out) should give you a closed circuit. Then while you are at it, make sure that when the brake pedal is depressed that the switch button moves enough to make a closed circuit. Also while you are there, check to see that you have 12 volts there.

 

[shift1313]

bronco joe, shouldnt it be a closed circuite when you press the button in and open when its out? i cant remember how the one in the bronco is but on all the other cars ive messed with as you press the pedal it preses the button and closes the circuit to light the lights.

this may or may not be two issues you are looking at here. more times than i like to count ive had two electrical problems pop up at the same time which makes tracking them down fun. But you know your brake lights dont work and the bulbs are good, first thing is the switch. if the switch is fine and you have power there like joe said then you have other problems. The lighting system on older vehicles is very simple. It could be as simple as you having a trailer connector tied into the line that has a short or problem somewhere.

good luck with it and update your findings here.