Quote:
Originally Posted by LS short box
In a nut shell the brake light switch closes when the plunger is depressed sending 12 volts to the brake lights. The TCC needs just opposite, when the plunger is depressed the contact opens to disengage the lock up converter. So using a multi meter set to ohms when the plunger is depressed. the brake switch contacts should allow current flow when the plunger is depressed. The TCC contacts should not allow current flow when the plunger is depressed the meter showing an open contact.
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Technically this is completely backwards from the way it works. The plunger is released when the brake pedal is depressed and is pushed in when the brake pedal is released. The switch's resting position when NOT installed in a vehicle is to have the brake light circuit of the switch closed, or in other words brake lights "on".