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#1 |
Proprietor of Dale's Corner
![]() Join Date: Nov 2012
Location: Vacaville , CA
Posts: 16,103
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Parking Brake Lamp
OK guys, I've been wanting this truck for years and my girlfriend talked the ol' guy out of it and bought it for my birthday in late Oct. I've been lurking here a while but now I have another 72 I joined. I have repaired every thing in the cluster except the parking brake lamp. The bulb is new the printed circuit is good and I tested continuity. I figured it was the switch on the pedal and when I looked I could'nt find one. So where is it? Any help would be appreciated
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"Some Days Chickens And Some Days Feathers" Dale XNGH ECV Sam Brannan 1004 R.I.P. 67ChevyRedneck R.I.P. Grumpy Old Man |
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#2 |
Registered User
Join Date: Dec 2004
Location: Aztec, NM
Posts: 388
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Re: Parking Brake Lamp
Pretty sure the brake lamp you are talking about is triggered by a pressure switch near the master cylinder on the engine side of the firewall.
In short, it's not a "parking brake lamp", its a light to alert you that something is wrong in your hydraulic, main braking system.
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Super Blue - 1968 C-10 Short Stepside
Fastburn 385, 4-Speed Sag. on the Column, Coleman 9" Floater w/Detroit TrueTrac |
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#3 | |
Senior Member
![]() Join Date: Oct 2006
Location: Wichita, Kansas
Posts: 1,050
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Re: Parking Brake Lamp
Quote:
The switch located on the top of the brake pedal is to activate the rear tail lights. |
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#4 |
Proprietor of Dale's Corner
![]() Join Date: Nov 2012
Location: Vacaville , CA
Posts: 16,103
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Re: Parking Brake Lamp
I thought from memory on my k5 and k10 it also worked with the park brake. Maybe the old age is setting in. I'll try grounding the valve wire and see if it comes on, Thanks for the info
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"Some Days Chickens And Some Days Feathers" Dale XNGH ECV Sam Brannan 1004 R.I.P. 67ChevyRedneck R.I.P. Grumpy Old Man |
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#5 |
The Older Generation
![]() ![]() ![]() Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,491
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Re: Parking Brake Lamp
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The guys are right. It is only activated if you have trouble with your brake system. Look at your proportioning valve and you will see a brown wire hooked to it. That is the wire that supplies that light with a ground if there is a problem. LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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#6 |
Proprietor of Dale's Corner
![]() Join Date: Nov 2012
Location: Vacaville , CA
Posts: 16,103
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Re: Parking Brake Lamp
Ok guys I just went out and grounded the wire (don't tell the boss) but you're correct it lit up. So I will correct my first statement everything in my cluster is repaired and working. LOL
Thanks Guys
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"Some Days Chickens And Some Days Feathers" Dale XNGH ECV Sam Brannan 1004 R.I.P. 67ChevyRedneck R.I.P. Grumpy Old Man |
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#7 | |
Registered User
Join Date: Nov 2009
Location: Sherman, ME
Posts: 2,359
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Re: Parking Brake Lamp
Quote:
To make the change, they simply added a switch to the park brake pedal assembly and wired it into the same circuit, allowing either switch to ground the brown wire and turn on the "brake" light. So it'd be easy to wire up if you would like to have the "brake" light in your 72 serve as a dual purpose indicator like it does in the newer trucks. |
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#8 |
Proprietor of Dale's Corner
![]() Join Date: Nov 2012
Location: Vacaville , CA
Posts: 16,103
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Re: Parking Brake Lamp
they were both 72's. Don't tell the kids I remembered wrong they'll put me in a home LOL. But Ive been thinking about your idea about making it do dual purpose already and going to look at it later. Thanks
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"Some Days Chickens And Some Days Feathers" Dale XNGH ECV Sam Brannan 1004 R.I.P. 67ChevyRedneck R.I.P. Grumpy Old Man |
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#9 |
Senior Member
![]() Join Date: Oct 2009
Location: Godley, TX
Posts: 17,963
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Re: Parking Brake Lamp
however, it COULD be a parking brake lamp if....
http://67-72chevytrucks.com/vboard/s...d.php?t=419932 Did this on my 66. Original plan was to add a small LED in the dash area as my parking brake lamp indicator - but ended up using a stock unused (except on C40+) light tube. Worked out great. But the same could be applied to 67-72 with an inconspicuous LED or bulb mounted somewhere (cuould also use dual circuit to have the dash BRAKE light indicate both (i.e. parking brake on OR single MC circuit failure. The light would still come on at start (as it should) but if it remained on, you'd know why it took so much gas to go forward... ) Just a thought. |
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#10 |
Registered User
Join Date: Aug 2010
Location: Edwards, CA
Posts: 7,503
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Re: Parking Brake Lamp
Exactly, all you need to do is add a switch to th park brake. It would ground the brake warning lamp by tying into the wire going to the combination valve.
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#11 |
Proprietor of Dale's Corner
![]() Join Date: Nov 2012
Location: Vacaville , CA
Posts: 16,103
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Re: Parking Brake Lamp
When it quits raining here i was going to look and see what it would take to add a switch so it will be dual purpose
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"Some Days Chickens And Some Days Feathers" Dale XNGH ECV Sam Brannan 1004 R.I.P. 67ChevyRedneck R.I.P. Grumpy Old Man |
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