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10-18-2008, 09:14 PM
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#1 |
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Registered User
Join Date: Sep 2008
Location: Danbury, Ct
Posts: 49
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Heater wiring problem
Well I just pulled out my 77 K-20 to get it ready for winter and decided to fix the PO's "fix" for the blower hi-med-lo switch. He just had a wire run from the post on the blower motor to the bat. to a toggle in the cab so it only had high. Well I pulled the dash apart and its a mess. Burnt connectors, wire cut all over. I dont know where half this stuff goes and what its supposed to look like. Does anyone have a wiring diagram for that or know where I can just get a new harness for that circuit. Also the fuel gauge is burried past full. What cause's that and is there a diagram for that. Thanks for the help
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72 Shortbed, fleetside, 4x4, 307,4spd. 55 second, 350, 4spd, almost done 77 K-20, 454, 4spd, plow truck 96 K-1500, 6 inch lift, 178k still going strong |
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10-18-2008, 10:19 PM
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#2 |
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Robert Olson Transport
 
Join Date: Oct 2002
Location: recent transplant to NC USA
Posts: 20,281
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Re: Heater wiring problem
haynes usually has wiring diagrams
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Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!! |
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10-19-2008, 01:35 AM
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#3 |
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Account Suspended
Join Date: Jul 2008
Location: Where I come from, it's cornbread and chicken...
Posts: 3,122
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Re: Heater wiring problem
check the ground by the tank for the fuel sending unit for the gauge problem...I'm sure someone can come up with a schematic for a certain part of the truck, but just asking for wiring schematics inside the dash is alittle vague...
Chuck. |
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10-19-2008, 02:33 PM
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#4 |
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Registered User
Join Date: Sep 2008
Location: Danbury, Ct
Posts: 49
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Re: Heater wiring problem
I need the diagram for the blower mmotor switch. thanks
__________________
72 Shortbed, fleetside, 4x4, 307,4spd. 55 second, 350, 4spd, almost done 77 K-20, 454, 4spd, plow truck 96 K-1500, 6 inch lift, 178k still going strong |
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10-19-2008, 03:02 PM
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#5 |
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Registered User
Join Date: Jul 2008
Location: Lemoore, Ca
Posts: 161
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Re: Heater wiring problem
Here is a picture from the factory wire diagrams. Forgot to add this is from the 77 wiring diagrams.
Last edited by keith61760; 10-19-2008 at 05:51 PM. |
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10-19-2008, 06:23 PM
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#6 |
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Registered User
Join Date: Sep 2008
Location: Danbury, Ct
Posts: 49
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Re: Heater wiring problem
sorry that I am not all that good with wiring but I fixed the switch so that now it works but I only have high. I traced the wires and there are 4 going to the resistor. There is power to that and power to different posts at different positions on the switch. That leads me to believe that my problem now is the resistor. What do you guys think. Thanks for the help.
__________________
72 Shortbed, fleetside, 4x4, 307,4spd. 55 second, 350, 4spd, almost done 77 K-20, 454, 4spd, plow truck 96 K-1500, 6 inch lift, 178k still going strong |
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