Parking brake indicator light - Chevelle Tech
Electrical & Wiring Troubleshooting electrical problems.

 
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post #1 of 13 (permalink) Old Jan 11th, 17, 3:12 PM Thread Starter
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Pat
 
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Parking brake indicator light

Probably a dumb question but, what activates the parking brake light on the dash? Mine does not work
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post #2 of 13 (permalink) Old Jan 11th, 17, 3:21 PM
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Re: Parking brake indicator light

A ground is connected by a switch on the emergency brake mechanism. When the pedal is all the way up, no ground is connected by the switch and then when it is pushed down some, the switch closes, and then connects the dash light wire to ground and the dash light should come on (providing the ignition switch is in the run position, the light is good, as well as the wiring, and other things).

The wire for the emergency brake switch it is also split to go to a switch on the proportioning valve. If there is a brake pressure failure, this switch connects to ground to turn on the dash light.

Hey, no such thing as a dumb question. If I started asking my dumb questions, I would be typing for weeks.

Jim
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post #3 of 13 (permalink) Old Jan 11th, 17, 4:57 PM
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Re: Parking brake indicator light

NOTE:
On the 70-72s look close at the switch, WHY? Sometimes the switch bracket ( bent, got bumped )will NOT make contact with " GROUND PIN " on the pedal. You may have to bend the switch bracket ( a WE bit) and re/adjust the switch.
Just something else to check out.
Bob

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post #4 of 13 (permalink) Old Jan 11th, 17, 5:05 PM Thread Starter
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Re: Parking brake indicator light

Quote:
Originally Posted by Jim Streib View Post
A ground is connected by a switch on the emergency brake mechanism. When the pedal is all the way up, no ground is connected by the switch and then when it is pushed down some, the switch closes, and then connects the dash light wire to ground and the dash light should come on (providing the ignition switch is in the run position, the light is good, as well as the wiring, and other things).

The wire for the emergency brake switch it is also split to go to a switch on the proportioning valve. If there is a brake pressure failure, this switch connects to ground to turn on the dash light.

Hey, no such thing as a dumb question. If I started asking my dumb questions, I would be typing for weeks.

Jim

Hmmm.. I see no wires coming off my emergency brake setup
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post #5 of 13 (permalink) Old Jan 11th, 17, 5:26 PM
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Re: Parking brake indicator light

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Originally Posted by Pats70ss View Post
Hmmm.. I see no wires coming off my emergency brake setup
The wire might be "stashed" somewhere by the mechanism. The wire is not that long and should be close to the fuse block. Who knows, it might have been cut off.

Here is the switch and wire on my 68 Chevy II:





Here is with the switch activated/grounded with the pedal partially down:



And then when the pedal is up and the switch is not connecting the tan wire to ground:



Jim
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post #6 of 13 (permalink) Old Jan 11th, 17, 5:50 PM
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Re: Parking brake indicator light

That tan wire comes off of the dash wiring harness.
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post #7 of 13 (permalink) Old Jan 11th, 17, 6:00 PM Thread Starter
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Re: Parking brake indicator light

ok..pretty sure I found the brown wire, it has a male connector on the end. Looks like in the pics there is a female connector that slips over end of the parking brake assembly switch. Any idea where I could snag one?

Last edited by Pats70ss; Jan 11th, 17 at 7:50 PM.
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post #8 of 13 (permalink) Old Jan 15th, 17, 2:35 PM Thread Starter
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Re: Parking brake indicator light

Are these available to purchase? I grounded out the brown wire and the light came on so it works, just need to be able to connect it to the switch and it seems I am missing the piece to do that.
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post #9 of 13 (permalink) Old Jan 15th, 17, 4:59 PM
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Re: Parking brake indicator light

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Originally Posted by Pats70ss View Post
Are these available to purchase? I grounded out the brown wire and the light came on so it works, just need to be able to connect it to the switch and it seems I am missing the piece to do that.
It looks like it is missing the bottom collar that the connector on the end of the wire pushes into.

Chances are they are available. I'm just attuned to the Nova models.

Here is one on a quick search on ebay that looks like yours:



Jim
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post #10 of 13 (permalink) Old Jan 15th, 17, 5:29 PM Thread Starter
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Re: Parking brake indicator light

Quote:
Originally Posted by Jim Streib View Post
It looks like it is missing the bottom collar that the connector on the end of the wire pushes into.

Chances are they are available. I'm just attuned to the Nova models.

Here is one on a quick search on ebay that looks like yours:



Jim

your correct Jim, that is what is missing. Can you send me the link to that auction? or what did you search?
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post #11 of 13 (permalink) Old Jan 15th, 17, 5:34 PM
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Re: Parking brake indicator light

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Originally Posted by Pats70ss View Post
your correct Jim, that is what is missing. Can you send me the link to that auction? or what did you search?
It seems to me I googled "1970 Emergency Brake Switch". The below is used but sometimes it might be cheaper than new and also last longer. Who knows sometimes.

1968-1972 Chevelle / Elcamino Parking Brake Switch | eBay

Jim
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post #12 of 13 (permalink) Old Jan 15th, 17, 5:43 PM Thread Starter
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Re: Parking brake indicator light

Thanks Jim...I scooped it up.




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post #13 of 13 (permalink) Old Jan 21st, 17, 6:58 AM Thread Starter
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Re: Parking brake indicator light

Fixed, put the new switch in I got off ebay and it lit right up.
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