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Author Topic: Heater / Vent fan not workey  (Read 11575 times)

Offline Marvan c10

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Re: Heater / Vent fan not workey
« Reply #15 on: January 18, 2012, 06:22:01 PM »

 The horn was disconnected it stuck one day and wouldn't go off. I just put a new 20 AMP in and still no B+ at the Hi/Lo switch.
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Offline VileZambonie

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Re: Heater / Vent fan not workey
« Reply #16 on: January 18, 2012, 08:58:15 PM »
How are you testing your fuses? Key on engine off backprobing the fuse with a test light?
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Marvan c10

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Re: Heater / Vent fan not workey
« Reply #17 on: January 19, 2012, 01:13:20 PM »

 key on, engine off with a test light. Looking at diagram I'm checking the Auxiliary Heater / AC
 There's no fuse in the ( B ) plug

   http://www.chuckschevytruckpages.com/77fusebox.html
 
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Offline Marvan c10

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Re: Heater / Vent fan not workey
« Reply #18 on: January 19, 2012, 04:05:36 PM »

 It's working !!!! found a fuse in the upper right hand corner of the fusebox, it calls for 20AMP but there was a 10AMP that was blown.. 
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Offline Marvan c10

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Re: Heater / Vent fan not workey
« Reply #19 on: January 19, 2012, 04:16:27 PM »

 Thanks so much VileZambonie.
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Offline VileZambonie

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Re: Heater / Vent fan not workey
« Reply #20 on: January 21, 2012, 09:42:29 AM »
LOL - You chased your tail but I bet you learned more than you ever thought you would about how your heater circuitry works right? Glad you're working again.
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,                           ___ 
                         /  _ _ _\_
              ⌠ŻŻŻŻŻ'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10
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