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Old 07-20-2014, 07:17 PM   #1 (permalink)
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Default Brake light switch? Wiring problems? Please help

I have 2007 Forenza. There was a head light out (low beam) and driver's side tail light. I bought two bulbs and replaced the head light. No problem. I moved to the tail light/brake light and it was quite corroded and very hard to get out. My dad put something on it to loosen it up and got it out after awhile and we finally got the new light in. I went to start my car to see if everything worked. It didn't not only was the light not coming on but the car was stuck in drive and the brake and tail lights on the passenger side stopped working as well. OK, now I think I need a brake light switch. So I called around and find a brake light switch for $15 but it will take a few days to get in stock.

We decide to take some of my dad's equipment to test what lights were getting power and whether or not we think its a wiring problem or a brake light switch problem for sure. After testing some thing out for awhile we bypass the brake light switch. Everything is working except the tail light we initially were going to replace the bulb on. Ok, progress. We need a tail light switch and possibly a socket for the tail light that was eatin up with corrosion. Maybe we damaged it when we were trying to get the light out.

So, confident that we had figured out the problem and a few replacement parts will fix it, I start my car by bypassing the brake light switch to unlock the shifter and then I realize that my gauge cluster is not working. It has worked fine before and even going through the testing at least part way because I would glance at it occasionally to check my gas/temperature. It isn't working now though.

Does anyone have any idea what could be causing this chain of problems. I don't think my gauges are direction related to the brake light switch or wiring to it in any way but I could be wrong. I don't know a lot about this car so I'm confused but I also can't afford to take it to a shop at the moment and pay for a ton of repairs if it isn't something simple. Any help would be appreciated.
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Old 07-31-2014, 05:33 PM   #2 (permalink)
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The brake switch has 4 wires. There are actually 2 separate switches in the brake switch housing.
One of the orange wires has constant +12V directly from EF13 (engine compartment fuse box). This wire lights the stop lamps via the Sb (Sky blue) wire when the switch is pressed.
The other orange wire (why they didn't use another color is beyond me...) has +12V only if the ignition is on. This wire is connected via fuse F4 (left side of the dash, 10A). This wire activates the solenoid that releases the shifter via the remaining green wire on the brake switch harness.

I suspect the F4 fuse is blown, as it also feeds the instrument cluster.
Inspect/replace the fuse and brake switch and you should be set.

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Old 07-10-2016, 11:30 AM   #3 (permalink)
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Quote:
Originally Posted by P1NkY View Post
The brake switch has 4 wires. There are actually 2 separate switches in the brake switch housing.
One of the orange wires has constant +12V directly from EF13 (engine compartment fuse box). This wire lights the stop lamps via the Sb (Sky blue) wire when the switch is pressed.
The other orange wire (why they didn't use another color is beyond me...) has +12V only if the ignition is on. This wire is connected via fuse F4 (left side of the dash, 10A). This wire activates the solenoid that releases the shifter via the remaining green wire on the brake switch harness.

I suspect the F4 fuse is blown, as it also feeds the instrument cluster.
Inspect/replace the fuse and brake switch and you should be set.

P1NkY, I have a 2006 Suzuki Forenza, and my 3 brake lights stopped working (including the rear window brake light). After seeing your diagram, I noticed the Reverse Lampss are included. It just happens that I have been having Reverse Lights issues too, as they sometimes work but most of the times these don't work (on and off). I checked the fuse box under the hood (10A) under brake lights and it's fine. I checked the brake pedal and it has wiring attached to the pedal, but don't see any switch. Can you please give me some idea of what can be wrong. I have no experience with electrical parts in car so please provide any details I may need to know. Thanks in advance!!!
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Old 08-16-2016, 11:11 AM   #4 (permalink)
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Check Suzuki North America website to see if your car is included in a wiring harness recall, assuming you're in N. America. Get it fixed for free!
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