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**pjmoreland** · 05-29-2021, 11:08 AM

Make sure the battery has a path to the chassis as well. This is usually through the negative battery cable to the engine, then from the back of the engine to the firewall, and then from the cab floor to the front right cab support on the chassis.

Also, did you check voltage along the circuit that BigBird05 described? These checks will need to be done with the brake pedal pressed down. Check for voltage at every connector in the brake light circuit.

05-29-2021, 11:08 AM	#10
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 5,295	Re: Getting brake lights to work Make sure the battery has a path to the chassis as well. This is usually through the negative battery cable to the engine, then from the back of the engine to the firewall, and then from the cab floor to the front right cab support on the chassis. Also, did you check voltage along the circuit that BigBird05 described? These checks will need to be done with the brake pedal pressed down. Check for voltage at every connector in the brake light circuit.