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Corner lights come on when hitting brakes

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Old 03-28-16 | 08:25 PM
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Corner lights come on when hitting brakes

Pulling into the garage, I noticed the corner lights come on when I hit the brakes by seeing their reflection on my refrigerator in my garage. I checked all of my lights and they are the correct bulbs in their correct locations. I don't know if I have a bad switch on my pedal or what. Has anyone else had the problem and if so what was your fix?
Old 03-29-16 | 12:57 AM
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By "corner lights" do you mean side marker lights or what?
The marker lights are part of the running light circuit and should have no point of contact with the brake lights at all.
If your brake lights work, it ain't the switch.
If the brake lights work and also flash the marker lights, it still ain't the switch...you have a glitch in the harness or sockets.

I am assuming- for no good reason- that the front marker lights are not acting weird.
Old 03-29-16 | 09:20 AM
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With all my lights off and my car not even running, if you hit the brakes all the marker lights come on even the flashers but they are solid
Old 03-29-16 | 09:28 AM
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Old 03-29-16 | 09:29 AM
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I was having a problem with my dash lights coming on when i hit the brakes. This was due to an incorrect bulb that was installed in the tail/brake lamp. Worth a shot.

Single filament vs dual filament i believe.
Old 03-29-16 | 09:30 AM
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My rear markers come on too, you don't see that in the video
Old 03-29-16 | 09:33 AM
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Just check the gd bulbs. How hard is it?
Old 03-29-16 | 09:54 AM
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My rear bulbs are the all good. I checked them and I'm still have this issue
Old 03-29-16 | 09:58 AM
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Are the tail lights all 1157's?
Old 03-29-16 | 10:23 AM
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Yes, they are the 1157's
Old 03-29-16 | 10:55 AM
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If its not the bulbs, then you have a short somewhere. I'd check the wiring at the tail lights as well as the harness at the from of the car responsible for the tail lights.

Heres some wiring diagrams.

Foxed.ca - Mazda RX-7 Manuals

Dont get offended, but for some reason, i dont believe you when you say you checked the bulbs.

Check all bulbs too.

Originally Posted by Icemark
What type of bulb is used in my USA spec MAZDA RX-7 in the..

High & low beam headlamp
H6054
H6054ST Silverstar High Performance Lighting: the whitest and brightest Halogen

Parking light
1157

Front turn signal
1157

Rear turn signal
1156

Tail light
1157

Stop light
1157

High mount stop light/Third Brake light
1156

Fog/Driving light
H3C-55W

License plate
168
89

Back up light
1156

Front sidemarker
194

Rear sidemarker
194

Ash tray
158

Map light
168

Dome light
DE3175
168 (spot lights on models equipped with factory sunroof)

Trunk/Cargo area
DE3022

Instrument-general
158
74

Hi-beam indicator
158

Automatic transmission indicator
158

Directional signal indicator in dash
158

Last edited by FührerTüner; 03-29-16 at 11:03 AM.
Old 03-29-16 | 11:03 AM
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Thanks for the diagram, I run through the wiring tonight, and I'll double the grounds some of them look sketchy to me.

Last edited by rx7b13; 03-29-16 at 11:10 AM.
Old 03-29-16 | 11:11 AM
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Some important info is missing. Has this problem always occurred or did it just start occurring recently.
Old 03-29-16 | 11:43 AM
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I bought the car from a guy and didnt notice this happening, to be completely honest. I just pulled into the garage one day and noticed the markers and turn signal lights on through a reflection when I was on the brakes. I've only had the car for 3 weeks and driven it maybe 3 times. I wouldnt try to BS you guys cause I want this problem fixed, and I wouldn't get anywhere if I was lying about my issues/experience with this car. so to answer your question honestly, I don't know if this was a pre existing problem when I got the car or not, my best guess would be yes this is a preexisting problem because, I have touched nothing elecrtical on the car. All I have done is fix a leaky brake caliper.

Last edited by rx7b13; 03-29-16 at 11:48 AM.
Old 03-29-16 | 11:46 AM
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Originally Posted by Fuhnortoner
If its not the bulbs, then you have a short somewhere. I'd check the wiring at the tail lights as well as the harness at the from of the car responsible for the tail lights.

Heres some wiring diagrams.

Foxed.ca - Mazda RX-7 Manuals

Dont get offended, but for some reason, i dont believe you when you say you checked the bulbs.

Check all bulbs too.
I have checked all of the exterior lights, my bad for not being clear. I'll tear throught the interior lights as well.
Old 03-29-16 | 01:20 PM
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Do the lights which turn on by depressing the brake pedal work normally when the pedal is not depressed?

And if you remove the stop light fuse and press on the pedal do the lights in question still turn on?
Old 03-29-16 | 01:43 PM
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Well I went through and checked all the exterior lights again, I felt like I was forgetting something. I must have gotten distracted and missed a set of brake lights. I found 2 of those autozone special led replacement lights. I swapped them out real quick and problem solved.
Old 03-29-16 | 01:44 PM
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Im sorry I caused some aggravation guys. But thank you for the help. Now it's time to find the cause of the drain on my battery.

Last edited by rx7b13; 03-29-16 at 01:48 PM.
Old 03-29-16 | 08:17 PM
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Bwaahhhh! I knew you didn't check em!
Old 03-29-16 | 08:23 PM
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Oh I did, I just missed 2 lights, wife wanted me to run to the gas station to get drinks yesterday, I checked the inner brake lights and I spaced the outer brake lights when I got back. I wouldn't have asked if I thought I exhausted all the logical options, but my short term memory got the best of me making me look like a fool. I hate those LEDs, I had them in my truck and they let popping fuses, they're junk.

Last edited by rx7b13; 03-29-16 at 08:31 PM.
Old 03-29-16 | 08:43 PM
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Ha! Smoke another bowl! Glad you got it goin.
Old 03-29-16 | 08:46 PM
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Man my short term is really bad, there's times after I go to the bathroom I forget if I flushed or not when I walk out of the bathroom, so I just pee in the shower now, it's a bigger target and it goes down the drain. No different than the green waterless urinals.
Old 03-29-16 | 09:08 PM
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I've heard if you pee on your feet, it protects them from infection.
Old 03-29-16 | 10:14 PM
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Haven't heard that one, but good to know lol, but I do know it helps with some infections.
Old 03-30-16 | 08:04 AM
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Originally Posted by rx7b13
Im sorry I caused some aggravation guys. But thank you for the help. Now it's time to find the cause of the drain on my battery.
Perform a amperage drain test. You can start by disconnecting the alternator from the equation by unplugging it and see if that's the culprit (the alternator itself could be the problem or the way it's wired). If that isn't the source then unplug the BTU fuse in the engine bay. If that's not it then unplug one of the other engine bay fuses until you narrow down which fuse/circuit is causing the drain and go from there.


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