Trouble shooting the brake light switch is easy!

Just take your test light or meter and probe on of the two terminal on the switch. One of the terminals should have current. If it doesn't then you need to check the fuse box. If you have current to one of the terminals then when you apply the brakes you should have current coming out the other terminal. If their is no current going to the second terminal ...replace the brake switch. If their is power coming out the other terminal of the switch then take you tester over to the steering column connector and check for current going into the column. I have a 64 wiring diagram and the color of the brake switch wiring going into the column is a white wire. If their is no current going from the brake switch wire to the white wire going into the column then the wire is broke some where and needs to be repaired or a new wire run from the brake switch to the white wire going into the column.

Now when you apply the brake, current goes into the column and is split to the left and right brake wires which are Dark Green and Yellow for the 1964. Now with the brakes applied you should be able to test either of these wires at the column connector and have current coming out of them. If you don't have any current showing at either wire then their is either something wrong with the column signal switch or you have a bad connection at the column connector.

Trouble shooting is basically a step by step process just as I've indicated.

Joe

Joe