"57" Emergency brake flasher

[Edward C.]

Is there a step by step process of adjusting the emergency brake flasher? Is the arm supposed to end up on top of a pin in the off position? Thanks.

[Roy B.]

Re: "57" Emergency brake flasher

loosen emergency unit and push toward fire wall , take brake off (in) move emergency unit up till that little spring push's against the shaft (PIN) that push's the unit pin in . That's off light don't work , then when you pull the handle the spring will let the unit pin move out and the emergency light will come on if the flasher is OK . Gee did I tell the story right??

[James F.]

Re: "57" Emergency brake flasher

Is there a step by step process of adjusting the emergency brake flasher? Is the arm supposed to end up on top of a pin in the off position? Thanks.

Ed,
Yes to arm supposed to end up on top of pin in off position, Yes also to Roy's explanation. Regards, Jim

[Gary C.]

Re: "57" Emergency brake flasher

Ed, if I recall correctly the e-brake supposed to be firmly set at 7 clicks, not sure when light's supposed to activate. Maybe Jim or Roy will remember. Gary....

[Jack H.]

Re: "57" Emergency brake flasher

Almost immediately upon pulling the p-brake handle. It only takes something like 1/2" for the rod shaft's trigger pin to clear from beneath the switch sensor arm creating a 'make' circuit for the warning lamp.

But, it will take some TIME for the warning lamp to switch between constant ON and flashing mode as the bi-metal switch inside the flasher module has to warm up...

[Edward C.]

Re: "57" Emergency brake flasher

I think I may have the wrong switch assembly. My removable section is on the right side which has about 1/4" clearance for the EM brake rod pin. The way mine is set up, there is no clearance when you turn the handle left to release the brake, therefore causing a collision between the pin and the assembly and the switch assembly gets knocked out of position. It appears it would work if I turned the switch assembly 180* and installed it below the actuating pin. Looking at the picture on K222 of the assembly manual, it appears the removable part of the switch is on the left. I need a good picture of a correct switch assembly.

[Mark P.]

Re: "57" Emergency brake flasher

loosen emergency unit and push toward fire wall , take brake off (in) move emergency unit up till that little spring push's against the shaft (PIN) that push's the unit pin in . That's off light don't work , then when you pull the handle the spring will let the unit pin move out and the emergency light will come on if the flasher is OK . Gee did I tell the story right??

Roy,

Do you have any pictures of the correct ebrake light/switch/bracket components for a 56? I have a 56 that I bought in boxes and I have some miscellaneous ebrake light parts, some of which are compatible and some are not. Not sure of the configuration that I am supposed to have for my 56. If you can shed some light, I'd be grateful. I think the first picture shows a unit out of a passenger car, and the second I think is Corvette, but the switch/bracket/light are a one wire design and the jewel with wire and fuse are a two wire design. I'll post pictures and would appreciate yours and others opinions.

Thanks for the help,
Mark

[Edward C.]

Re: "57" Emergency brake flasher

OK, I think I have the switch assembly adjustment figured out. Now a question about the flasher: I have three flashers and on two of them I have the same voltage coming out as I do going in (11.75V), one the third one I only have 3.75V coming through and neither of the three will light the flasher bulb, but when I ground the wire coming from the flasher bulb it lights up fine?? Any thoughts on this. Ed

[Jack H.]

Re: "57" Emergency brake flasher

Hum, this is becoming an ordeal...

Per the AIM sheet, power comes from the fuse block on the tan wire to and through the warning lamp filament. It returns from the lamp to the p-brake switch flasher module.

The circuit completes to ground (through the brake handle shaft) when the brake is engaged and the switch lever falls off the shaft's hold-up pin. So, there's full time power to the lamp and the circuit 'makes' when the switch assy senses the brake handle is moved off its disengaged position toward an engaged position.

[Edward C.]

Re: "57" Emergency brake flasher

Jack,

That is exactly the way I understand it to work but why will the light work when I ground the wire coming from the light but not work when I ground the bottom of the flasher? Both points on the flasher measure 11.75 volts to ground. Seems the problem has to be in the flasher. Thanks. Ed

[Jack H.]

Re: "57" Emergency brake flasher

When you ground the wire from the warning lamp, you're bypassing: (1) the flasher module, (2) the switch, and (3) the p-brake to dash ground connection. I'd say your problem(s) lie there...

[Edward C.]

Re: "57" Emergency brake flasher

Thanks Jack, I'll check out the parking brake to dash ground connection first thing in the morning.