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Strange '74 Blower Relay

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Old Jan 13, 2013 | 07:49 PM
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Default Strange '74 Blower Relay

So... working on a customers '74 in my shop that has been sitting for years. This is a NON-AC car... just a simple heater box. The relay is not the standard metal relay that screws to the box/firewall. This one has a nice plastic socket & must have had a plastic case on the relay. Now gone & relay is all smashed up so not really usable. Wiring appears to be factory in that area but this is a diff one for me. Anyone seen this? The local part houses & the big corvette part vendors all want to sell the old style steel cased relay. Oh...& the pin is opposite position on the single blade side from all the photos I've looked at for the metal relay...

TIA!
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Old Jan 13, 2013 | 08:19 PM
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Are you talking about this?
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Old Jan 14, 2013 | 10:50 AM
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YES!! That looks like it... Where can I get one?!? From the looks of that photo, there is another blower relay down lower & off to the right?!? Is this relay for something else?
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Old Jan 14, 2013 | 11:32 AM
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Originally Posted by Trog
YES!! That looks like it... Where can I get one?!? From the looks of that photo, there is another blower relay down lower & off to the right?!? Is this relay for something else?
That is the seat belt interlock switch. In 1974 the ignition was disabled if you did not have your seat belts buckled up and turned the key. That switch restores power to the ignition.



The fan/blower relay is indeed down lower and to the right. Pete's pic shows it as well.



Here is the fan relay (this one for A/C).


Last edited by Paul L; Jan 14, 2013 at 11:47 AM.
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Old Jan 14, 2013 | 11:56 AM
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Excellent.... now to find one. Doesn't appear local parts house web site lists it... damn.
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Old Jan 14, 2013 | 12:15 PM
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That seat belt relay might be bypassed already, if so then you don't need it and if not bypassed here's how:
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Old Jan 15, 2013 | 10:15 PM
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Thanks for this info, i also have been wondering what i did to that plastic clip. I cut the wires for something years ago and cant remember what i did it for.
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Old Jan 16, 2013 | 04:18 PM
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They can be bought for about 300$ and show up on ebay once and a while
seat belt interlock override relay
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