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10-14-2005, 07:33 PM
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#1 |
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Registered User
 
Join Date: Jul 2004
Location: Lilburn, GA
Posts: 209
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Mystery wire under my hood
Anybody know where this wire should go? It's a tan wire coming out of the harness in the firewall gutter. It has a 90 degree plugin connector with a 12 inch pigtail pulled into it. The other end of the pigtail is broken off and it's just hanging loose.
Last edited by 71Shortbed; 10-14-2005 at 07:34 PM. |
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10-14-2005, 07:37 PM
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#2 |
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Registered User
Join Date: Apr 2002
Location: New Carlisle, Ohio,USA
Posts: 1,404
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Looks like it goes to the plug on the proportioning valve?
  
__________________
LIFE AIN'T EASY WHEN YER FAT AND GREASY! GMC= Got More Class!  1970 GMC LWB, Fleetside, 350/4spd, Flowmaster "40's", 2002 GMC 16" Rallies, cowl hood,and added a bunch of options that weren't there when I started. 
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10-14-2005, 07:42 PM
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#3 |
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Registered User
Join Date: Nov 2003
Location: Alexandria, VA
Posts: 1,534
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Ohio is right but I think your proportioning valve is a replacement and doesn't appear to have the brake warning switch.
__________________
'72 GMC SWB C1500 Custom, frame-off in progress. 383 SBC, 9:1CR, Comp Cams XE262H, Scat internal balanced crank, Eagle SIR 6" rods, Keith Black dish pistons, Dart Iron Eagle 72/180 heads, Weiand Stealth intake, Stewart stage I water pump, Holley 4bbl vac sec, TH350 with B&M Shift Improver Kit. 12 bolt positraction.   
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10-14-2005, 07:54 PM
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#4 |
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Registered User
Join Date: Jan 2002
Location: WATAUGA,TX
Posts: 675
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__________________
72 2wd 307/AT/AC/TILT WHEEL 78 JIMMY HIGH SIERRA |
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10-14-2005, 07:58 PM
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#5 |
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Registered User
Join Date: Jul 2004
Location: Lilburn, GA
Posts: 209
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Thanks guys. That explains why my warning light never comes on.
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10-14-2005, 08:04 PM
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#6 |
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Senior Member
Join Date: Aug 2003
Location: Conyers,Ga.
Posts: 7,288
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P Valve
Looks like a drum brake P valve to me.
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10-14-2005, 09:44 PM
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#7 |
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Registered User
Join Date: Jul 2004
Location: Lilburn, GA
Posts: 209
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I checked it and there is a rubber wire connecter on the bottom of the valve. You can see part of it in the picture. I guess I'll hook the sucker up.
Last edited by 71Shortbed; 10-14-2005 at 09:47 PM. |
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10-14-2005, 10:40 PM
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#8 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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I was going to recomend looking there for it...
How can one tell if it is a drum distrabution valve, or a disc/drum proportioning valve? |
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10-14-2005, 11:10 PM
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#9 |
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Senior Member
  
Join Date: Jan 2005
Location: CA
Posts: 5,796
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It looks like the drum/drum proportioning valve that was on my '67. My '72 has a disk/drum proportioning valve that is way bigger than that and has a little rubber cap in the front of it. Also the front brake line attaches to the bottom of the proportioning valve instead of the front.
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10-15-2005, 06:13 AM
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#10 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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well hot dam... I didn't know they looked so different. cool.
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10-15-2005, 07:11 AM
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#11 |
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Designated A-hole!
Join Date: Mar 2003
Location: South Mississippi
Posts: 36,450
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Learn something new everyday.
__________________
"If it ain't broke, fix it 'til it is!" Being stupid ain't illegal.  We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck" |
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10-15-2005, 10:21 AM
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#12 |
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Registered User
Join Date: Apr 2002
Location: New Carlisle, Ohio,USA
Posts: 1,404
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I was going to say that the prop. valve in the pic looked like the one I had on mine (all drum) before I changed it to drum/disk. Well Andy, at least ya learned something today? So it's not entirely wasted?
__________________
LIFE AIN'T EASY WHEN YER FAT AND GREASY! GMC= Got More Class! 1970 GMC LWB, Fleetside, 350/4spd, Flowmaster "40's", 2002 GMC 16" Rallies, cowl hood,and added a bunch of options that weren't there when I started.
Last edited by OhioDan; 10-15-2005 at 10:22 AM. |
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10-16-2005, 10:54 AM
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#13 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: Mystery wire under my hood
Yeah, but I was trying soooo hard NOT to learn anything today!
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