03-17-2022, 03:20 PM | #1 |
Registered User
Join Date: Mar 2022
Location: bedford nh
Posts: 26
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Help with wiring...
Hey peeps... Let me start by saying sorry, as I know there are a lot of threads out there regarding heater wiring, and I have been using search function and have the diagrams, but I still a little confused.
Can someone help me by explaining what relays I need to use, and ones I dont, and How I should go about wiring the ones I need together? I have 72 stepside with Ac but do not want ac to work, just heat. I have ordered most new relays and connectors, but I am not sure how to wire them all together! Like the compressor switch on the back of the heater tube box, do I even need that if im not hooking up ac? the resistor that is inside the box and close to the heater core, how do I wire that, cause I cannot find a connector for it on LMC. I have ordered the a/c blower relay and connector, as well as the fan controller wire connector. Anyone that can guide me in the right direction, I will appreciate! Last edited by gagraphics; 03-17-2022 at 04:09 PM. |
03-23-2022, 03:27 PM | #2 |
Msgt USAF Ret
Join Date: Jan 2005
Location: Kalamazoo, Michigan
Posts: 8,707
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Re: Help with wiring...
I would refer you to this thread, It may help. I don't believe there is a relay just the resister.
http://67-72chevytrucks.com/vboard/s...d.php?t=689364
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VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative. |
03-23-2022, 03:29 PM | #3 | |
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Re: Help with wiring...
Quote:
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03-26-2022, 09:56 PM | #4 |
Senior Member
Join Date: Apr 2016
Location: Cypress, TX
Posts: 3,577
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Re: Help with wiring...
You have an A/C truck, so there is at least one relay for high speed selection of the blower motor, and since it is a 72 there may be another relay for anti-dieseling (which is probably not needed. So, follow the wiring diagrams for the four seasons A/C which are in the service manual.
Service manuals: http://67-72chevytrucks.com/vboard/s....php?p=5781194 Threads with A/C wiring page from service manual, both with and without anti-dieseling relays. http://67-72chevytrucks.com/vboard/s...d.php?t=727010 https://67-72chevytrucks.com/vboard/...d.php?t=807883 |
03-27-2022, 06:22 AM | #5 | |
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Join Date: Mar 2022
Location: bedford nh
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Re: Help with wiring...
Quote:
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03-27-2022, 06:52 AM | #6 |
Registered User
Join Date: Mar 2022
Location: bedford nh
Posts: 26
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Re: Help with wiring...
ALSO!!! anyone know where to buy the connector for the resistor, or should I just wire without connector? Can seem to find on LMC!
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03-27-2022, 09:37 AM | #7 |
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Join Date: Apr 2016
Location: Cypress, TX
Posts: 3,577
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Re: Help with wiring...
Do you have a painless wiring harness and that is why you are using diagrams from painless?
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03-27-2022, 09:39 AM | #8 | |
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Join Date: Mar 2022
Location: bedford nh
Posts: 26
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Re: Help with wiring...
Quote:
https://www.painlessperformance.com/Manuals/30901.pdf |
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03-27-2022, 12:09 PM | #9 |
Senior Member
Join Date: Apr 2016
Location: Cypress, TX
Posts: 3,577
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Re: Help with wiring...
Good, let's see if they live up to their name.
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03-27-2022, 01:20 PM | #10 |
Registered User
Join Date: Mar 2022
Location: bedford nh
Posts: 26
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Re: Help with wiring...
So far I have been very happy with it. Manual for main harness is very descriptive, and all wires have numbers and labels on them. Making its easy to find the ones you need. I'll update on this post when I get the heater harness. But from pictures, looks like everything is there and I just need to plug in... Now just praying my heater core is not leaking!
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