02-02-2012, 10:04 AM | #26 |
78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: Heater doesn't work
yup should get some psst noise
air feed from the back
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
02-02-2012, 01:37 PM | #27 |
Registered User
Join Date: Aug 2011
Location: Winnsboro TX
Posts: 234
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Re: Heater doesn't work
A LOT OF INFO HERE!!!!
http://67-72chevytrucks.com/vboard/s...d.php?t=460942 I have an '86 with A/C. Hardly any vac lines. I have a line through the firewall straight to the controller (above the radio). I run that line from my carb, through the firewall. Replaced the actuators, and presto, air goes where it's supposed to. Oh yeah, if you take the black box off (inside of cab), might as well go ahead an replace the heater core too.
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1st - '68 long bed 2nd - '81 SWB Now - '86 SWB, Edelbrock 1406/stock 350/700r4 |
02-02-2012, 06:57 PM | #28 |
Registered User
Join Date: Nov 2011
Location: Anchorage Alaska
Posts: 26
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Re: Heater doesn't work
so in my 94 the heater quit working one day but i reached over with my snow brush and hit the blower motor pretty hard and the heater came back on, I know its not a good fix or the right kind of truck but its worth a try
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1985 Chevy C10 swb 350 |
02-02-2012, 09:51 PM | #29 |
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Join Date: Mar 2011
Location: Kansas City, Missouri
Posts: 3,541
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Re: Heater doesn't work
I was having issues with my heater last week, previous owner somewhere down the line decided to cut the power to the heater control and run it to the tach so the light would work...overachievers. I would have just ran a power to the fuse box. I ran a power wire to the battery and one to the blower to make sure it was working fine. It worked so I knew I had a power issue. That worked fine on my 1969 Chevy might be different on the newer trucks though
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Scott |
02-02-2012, 11:52 PM | #30 |
78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: Heater doesn't work
check to see if the housing is bent....from leaning on it
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
10-09-2012, 05:04 PM | #31 |
Registered User
Join Date: Aug 2009
Location: Coalport, Pa
Posts: 23
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Re: Heater doesn't work
I had to bring this thread up again because it helped me out the last time. But I believe the po switched some of the vacum lines around. Does anyone have a schematic of the vacum lines coming off of the heater control switch?
Also, the flapper door that has that little white clip that usually breaks, my flapper is missing most of the rubber seal that surrounds it. I didn't see it listed as a part in LMC, does anyone know where to get it? And finally, when I apply the brake pedal there is a clicking sound coming from the steering colum area. I can't tell for sure where, I suspect it might be something with the cruise control. Has anyone else had this occur? Thanks, Ken |
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