brake lights flicker while driving

What could be the cause of the brake lights flickering while driving? I have a dual reservoir conversion with Discs up front and 11 inch rear drums. All new brake lines. The brake light switch is new also. Could it be the pressure not being released in the lines? If so,how to check it? All the other lights work without any issues.
Paul

 

Do you have any free-play in your brake pedal? If not, that could be your problem...

 

Are you using an equalizer/proportioning valve and how many stop switchs do you have in the system?

 

there is 1 pressure switch in the system and a proportioning valve. Very little free play in the brake pedal. I will be posting a pic shortly...

 

Possible ground issue?

 

I went out and pushed the brake pedal in. It travels less than an inch before almost fully engaged (NO FREE PLAY). I let it go. Checked the brake lights and they were on. I pulled on the brake pedal back, then rechecked the lights. No brake lights.
1) from what I gather, there is a place to adjust the brake pedal. Does that just adjust where it sits at rest?
2) am I in left field, or could there be an issue with too much pressure left in the line after using the brakes? Is that thought even a reality?
3) doubt ground given the above symptoms.
4) if free play is the issue, how to adjust?
5) does a 57 CJ 5 with 32 tires not coast well or is it just me? I mean when you put it in neutral and coast the jeep tends to slow quickly. I was told this issue was expected with the larger tires. Just a thought since number 2 above may lead into this question.

I will upload pics of the system when I get the kids back from T-Bell.

Paul

 

Also grease the pedal pivots under the floor. The pedal could be binding on the shaft and not fully returning under spring pressure. If you press on the clutch pedal by hand, does the brake pedal move with it? It shouldn't move much, they should be free enough to pivot independently on the shaft. Vintage grease can get really hard and bind up. The 50s and 60s jeeps pedal shaft was under the floor, where it was subject to continual water splash from the right front wheel.

You should grease this every oil change at least.

 

got some pics. The proportioning valve is in the line to the rear brakes. The brake switch is in the front brake line.

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just posted another topic about my front disc brakes. Perhaps the rod can be the culprit to both..

 

Very well could be if holding pressure on the system. Could be just enough pressure held so the lights are off when sitting but when it bounces driving down the road it builds just enough to activate the switch.

 

From reading this, I would look at the adjustment and return spring first. My thinking is the pedal is not returning completely.