Brake Lights Illuminate When Clutch Depressed

[TalonJohn94]

Just as the title says. I finally got my starter relay and cruise control pedal plug worked out and now I have this problem.

They don't turn off when I "pull the brake pedal back" or if I wait 5 seconds. (as was mentioned in a Mustang forum when I Googled)

Any ideas why this would happen?

 

[19Eclipse90]

So, likely related to this: http://www.dsmtuners.com/forums/drivetrain-tech/442641-request-clutch-pedal-switch-pics.html.

Do you have the starter switch connected and does the car require that be depressed to start the car? The car obviously has cruise control, so the brake pedal switch should be a 4-pin connector. Is that how yours is?

 

[TalonJohn94]

Yes related to that. I thought I had everything good to go: Clutch depressed required to start engine, cruise operational and turns off when clutch depressed. But yeah now it cause the brake lights to light up.

I'll look at the brake pedal switch when I have a chance, but both pedals light up the brakes.

People behind me at night must be like WTF??

 

[jtmcinder]

Start with jokes and compliments. If that doesn't work, try chocolate or a can of Red Bull. There are no OTC anti-depressants in the US, so your next step would involve getting a script.

 

[TalonJohn94]

I kinda thought that was coming.

Technical terms are more concise, rather than something like "so the brake lights turn on when I push the clutch in even though the brake lights work when I push on the brake pedal and it lights up after a long time I don't know what to do what should I do ..."

Anyways, I never removed the brake switch plug so I don't think I have them mixed up.

 

[19Eclipse90]

On vehicles with cruise control, there is the 4-wire brake light switch and a 3-wire, 2-pin connector right next to it that is left open, in addition to the two 2-pin connectors for the clutch pedal switch. If for some reason you hooked that connector to the cruise switch on the clutch pedal, it would activate the brake lights when the pedal was pressed. That's about the only thing I can come up with, though. Check the wire colors running to each switch on the clutch pedal.

EDIT: Here's a nice picture illustrating this. The black box shows the 3-wire, 2-pin connector explained above. Note that the 4-wire connector, red box, is plugged into the brake pedal switch.

The yellow box is the cruise control deactivation switch. The blue box is the switch for the starting circuit.

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