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05-23-2002, 06:32 AM
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#1 |
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Registered User
Join Date: May 2002
Location: Lexington, KY
Posts: 23
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Update
I found out that it was the fan switch that was blowing my fuses. Got a new switch and now it only works on high. Also, when I had the heater & A/C control panel loose from the dash to put in the new switch, I noticed one of the vacum lines is missing and another is cut right outside the firewall. I don't know where the heck these are supposed to plug in. Does anybody know where I might find a vacum line routing diagram or anything that might help?
Thanks so much! |
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05-23-2002, 07:54 AM
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#2 |
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Registered User
Join Date: Nov 2001
Location: Fairmont WV
Posts: 304
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I have the diagrams posted on web shots, check out the '71 chassis manual section
http://community.webshots.com/user/rod_childers ------------------ Rod Childers '71 C10 Stepside
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Rod Childers '71 C10 Stepside |
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05-23-2002, 11:47 AM
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#3 |
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Registered User
Join Date: May 2002
Location: Lexington, KY
Posts: 23
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Those diagrams were a big help, Thanks! Any ideas why the fan only comes on high now?
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05-23-2002, 12:00 PM
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#4 |
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Recovering Truck Driver
Join Date: Mar 2002
Location: Orleans, NE USA
Posts: 1,883
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the fan switch feeds current through a resistor to slow the fan motor down on low and med. The high side is a direct path. My guess would be that your resistor block is fried.
------------------ "In the words of Motley Crue, This will always be my home sweet home" Ol' Buck: '72 Chevy 1/2T 4x4 shortbox stepside 350/350auto on '84 ralleys and 31/10.5s Angel girl: 67 Cutlass convertible 330, 3spd stick Greener: 90 GMC Jimmy 350/auto Chad Stephens Orleans,NE no name yet: 72 442 under serious construction my site: http://communities.msn.com/Beastonabudget/homepage
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67 K-20 350, SM465, Eaton rear, 4.56 no spin option 00 Dodge 2500 4x4, 24V cummins, 5 speed Chad South Central Nebraska |
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05-23-2002, 01:52 PM
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#5 |
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GMC SHORT FLEET F/S
Join Date: Jun 2000
Location: SOUTH WILLIAMSPORT PENNSYLVANNIA
Posts: 2,117
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I'll have to agree with Buck!
------------------ Charles W. Hein S. Williamsport PA imaindianoutlaw@yahoo.com REFRIGERATION TECH 1971 Rolling chassis FOR SALE 1963 Pontiac Tempest 1965 Pontiac GTO {SOLD} 1956 Pontiac 2 dr complete for parts
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CHARLES WADE HEIN HVACR FOREMAN. LEWISBURG U.S.P. |
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05-23-2002, 03:27 PM
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#6 |
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Senior Moment
 
Join Date: Mar 2002
Location: Pittsburg Ca
Posts: 4,048
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And you will find this inside the heater box tucked away real nice, I had the same problem. Kept blown fuses when I turned on the fan, changed the switch , no help, changed the resistor, ALL FIXED. a real pain working under the dash
------------------ Steve's 70 CST 02 Burb (wifes Truck) www.picturetrail.com/70CST Pittsburg Ca., that's right Ca.
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1970 CST LS 1 6 speed Ford 9 inch Detroit Tru Track, Dakota Didgital, Vintage Air, QA1 Coil Overs Front & Rear Lots of FUN 2013 GMC PU, Oldest Son 71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son 2019 GMC Diesil Dually. Youngest Son 2017 Toyota SUV Daughters car 2018 Traverse , Wife’s Ride Pittsburg Ca 94565 |
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