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09-28-2009, 07:35 PM
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#1 |
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Senior Member
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
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Re: Help with heater needed
#2 wire is for an oil pressure light setup and would have hooked into the block behind the distributor.
#1 wire is for the engine temperature and was probably a "hot" light hookup. Starting at the heater motor make sure it runs by connecting a 12 volt jumper wire to it. If the motor runs then check for power at the heater switch, before and after. If no power at the switch recheck the fuse holder connections. From your picture it looks like there is a corrosion problem with the contacts. If power is going through the switch check the resistor block and wiring. Jim
__________________
1971 Shortbox step side 4x4, 350 sbc, 3:07 rear end 1965 Impala SS 400 sbc, Muncie rock crusher 1966 Impala SS 396 bbc, TH 400 1969 El Camino, 350 sbc, TH 350 1971 Snowplow built on a Blazer frame 1972 GMC Short bed, stepside, TH 400, 427 BBC Last edited by JimKshortstep4x4; 09-28-2009 at 07:37 PM. Reason: Added wording |
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09-28-2009, 07:47 PM
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#2 |
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Registered User
Join Date: Apr 2009
Location: Normal, IL
Posts: 138
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Re: Help with heater needed
Thanks Jim, I'll check it out...really appreciate it!!
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09-28-2009, 08:23 PM
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#3 |
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Registered User
 
Join Date: Jan 2009
Location: marion nc
Posts: 588
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Re: Help with heater needed
hey slate, look and make sure that your heater control cables are all connected and moving freely, they can bind up and stick.
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69 short fleet 350/350 "under construction" 70 short step 307/3 speed |
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09-28-2009, 08:54 PM
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#4 |
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Registered User
Join Date: Dec 2007
Location: Santa Maria, Ca.
Posts: 1,423
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Re: Help with heater needed
Might also check that ground strap on the fan motor.
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69 Chevy 4x4 383 Power 
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09-28-2009, 09:41 PM
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#5 |
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The Older Generation
  
Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 26,101
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Re: Help with heater needed
-
The A/C fuse also has to be good for the heater to work. At least it did on my '71 4x4... LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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09-29-2009, 07:03 PM
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#6 |
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Registered User
Join Date: Apr 2009
Location: Normal, IL
Posts: 138
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Re: Help with heater needed
Thanks guys...the ground needed to be cleaned up. Now it's either on or off, that means resistor right? and is the resistor under the glovebox? How do I get at it?
Last edited by slategrove; 09-29-2009 at 07:04 PM. |
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09-29-2009, 07:55 PM
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#7 |
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Senior Member
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
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Re: Help with heater needed
Can you feel the three positions in the switch when you move the lever? I have seen more problems with the switch then I have with the resistor. Removing the glove box will help you in getting at the resistor.
Jim
__________________
1971 Shortbox step side 4x4, 350 sbc, 3:07 rear end 1965 Impala SS 400 sbc, Muncie rock crusher 1966 Impala SS 396 bbc, TH 400 1969 El Camino, 350 sbc, TH 350 1971 Snowplow built on a Blazer frame 1972 GMC Short bed, stepside, TH 400, 427 BBC |
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