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08-17-2009, 09:30 PM
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#1 |
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Registered User
Join Date: May 2009
Location: Jessup, MD
Posts: 57
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Switches on brake pedal
I have a brake light switch that has the cruise control cancel in it. Next to that switch is another switch that has what looks to be a vaccuum line attached to it. This vaccuum line hooks into the cruise control module. What is it for, if there are wires for the module going to the brake switch too??
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Jamie Play truck / kid hauler - 1989 V2500 Burb 4x4, 350, 700R4, 4" lift, headers, elec fans, the normal mods. Getting ready for the LS1 swap!! |
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08-17-2009, 09:37 PM
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#2 |
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Next project: 1970 K10
Join Date: Feb 2004
Location: Fort Collins, Colo 80524
Posts: 6,684
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Re: Switches on brake pedal
Probably has something to do with disengaging the torque converter clutch (TCC).
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Bob 1970 Chevy K10 LWB "Goldie" 350/TH350 next project!! 1981 Chevy C10 LWB 355/TH350 - My son's truck LS SWAP FORUM! Tons of LS swap info here! PLEASE CLICK HERE TO SUPPORT THE GREATEST BOARD ON THE NET! CLICK HERE FOR THE FAQ INDEX by KRUE |
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08-17-2009, 09:41 PM
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#3 |
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Registered User
Join Date: May 2009
Location: Jessup, MD
Posts: 57
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Re: Switches on brake pedal
I guess i should have said that the truck originally came with a TH400, so there was no lockup to start with.
__________________
Jamie Play truck / kid hauler - 1989 V2500 Burb 4x4, 350, 700R4, 4" lift, headers, elec fans, the normal mods. Getting ready for the LS1 swap!! |
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08-19-2009, 11:57 AM
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#4 |
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Registered User
Join Date: Jul 2007
Location: Ontario Canada
Posts: 1,006
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Re: Switches on brake pedal
one of those switches are for the electric kickdown if you have a turbo 400
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08-19-2009, 12:02 PM
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#5 |
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I have car A.D.D.
Join Date: Feb 2009
Location: Greeley, Northern Colorado
Posts: 4,147
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Re: Switches on brake pedal
kickdown on the brake pedal?
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-Gerald Building vehicles in memory of the first "car guy" I ever knew, my Grandpa. Bob Dunham 1935-2009. Rest in peace. 61 GMC Suburban SOLD The 86 build thread SOLD Are you a Colorado member?Click here. |
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08-19-2009, 12:12 PM
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#6 |
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Registered User
Join Date: Jul 2007
Location: Ontario Canada
Posts: 1,006
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Re: Switches on brake pedal
LMAO!!!!!!!!...my god hope I dont get the gas and brake mixed up when I,m driving sorry guys a brain fart is the only explanation i got
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08-19-2009, 12:34 PM
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#7 |
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Kid's Mechanic
Join Date: Nov 2006
Location: Kansas City
Posts: 8,241
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Re: Switches on brake pedal
the vac switch is a Vacuum bleed for the cruise control to drop the cruise off,did have a cruise control go haywire and would not shut off but the vac switch on the pedal shut it down when i hit the brakes
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08-19-2009, 12:34 PM
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#8 |
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I have car A.D.D.
Join Date: Feb 2009
Location: Greeley, Northern Colorado
Posts: 4,147
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Re: Switches on brake pedal
Brain fart.
 Crazy cruise control is scary.
__________________
-Gerald Building vehicles in memory of the first "car guy" I ever knew, my Grandpa. Bob Dunham 1935-2009. Rest in peace. 61 GMC Suburban SOLD The 86 build thread SOLD Are you a Colorado member?Click here. Last edited by Driveway Dreams; 08-19-2009 at 12:36 PM. |
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08-19-2009, 09:08 PM
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#9 |
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Registered User
Join Date: May 2009
Location: Jessup, MD
Posts: 57
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Re: Switches on brake pedal
Ok, the vacuum line goes to the CC, so then what do the gray & gray/black wires go to on the top of the brake switch? I tested these leads, and they are normally closed, so do these got to the CC too? I would love to disconnect the gray wires and use the switch for the TCC lockup release.
__________________
Jamie Play truck / kid hauler - 1989 V2500 Burb 4x4, 350, 700R4, 4" lift, headers, elec fans, the normal mods. Getting ready for the LS1 swap!! |
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08-19-2009, 10:55 PM
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#10 |
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Kid's Mechanic
Join Date: Nov 2006
Location: Kansas City
Posts: 8,241
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Re: Switches on brake pedal
yeah wires are CC
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08-20-2009, 11:58 AM
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#11 |
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Next project: 1970 K10
Join Date: Feb 2004
Location: Fort Collins, Colo 80524
Posts: 6,684
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Re: Switches on brake pedal
Can't you just tap into them to use the same leads for the TCC?
__________________
Bob 1970 Chevy K10 LWB "Goldie" 350/TH350 next project!! 1981 Chevy C10 LWB 355/TH350 - My son's truck LS SWAP FORUM! Tons of LS swap info here! PLEASE CLICK HERE TO SUPPORT THE GREATEST BOARD ON THE NET! CLICK HERE FOR THE FAQ INDEX by KRUE |
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08-20-2009, 03:09 PM
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#12 |
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Registered User
Join Date: May 2009
Location: Jessup, MD
Posts: 57
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Re: Switches on brake pedal
That's what i wanted to do, but there isn't 12v going to the switch when the CC is off, so I'd have to get rid of the CC to use the switch which I think I am going to do. I only use CC on long trips, so oh well, bye CC.
__________________
Jamie Play truck / kid hauler - 1989 V2500 Burb 4x4, 350, 700R4, 4" lift, headers, elec fans, the normal mods. Getting ready for the LS1 swap!! |
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08-20-2009, 03:39 PM
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#13 |
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Next project: 1970 K10
Join Date: Feb 2004
Location: Fort Collins, Colo 80524
Posts: 6,684
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Re: Switches on brake pedal
My 85 has two switches, and came equipped from the OEM with a lock-up TH350C and cruise.
You need ACDelco part number D850A, or GM part number 25524845. This is the brake pedal switch for use with TCC. It has 4 terminals; 2 for the brake lights, and 2 for the TCC. IIRC, the 2 for the TCC are 12v+ until the brake is pressed.
__________________
Bob 1970 Chevy K10 LWB "Goldie" 350/TH350 next project!! 1981 Chevy C10 LWB 355/TH350 - My son's truck LS SWAP FORUM! Tons of LS swap info here! PLEASE CLICK HERE TO SUPPORT THE GREATEST BOARD ON THE NET! CLICK HERE FOR THE FAQ INDEX by KRUE Last edited by glock35ipsc; 08-20-2009 at 03:40 PM. |
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