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Topic: Blower Relay

in Forum: C3 Electrical


Blower Relay

Posted: 6/26/04 2:43pm Message 1 of 5
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ORLANDO, FL - USA
Joined: 12/11/2002
Posts: 459
Vette(s): 1980 L82 Dark Metallic Green Coupe, Gymkhana Suspension, AM/FM/CB, GM ZZ383....nice....
My blower changes speed throughout the low-high fan switch but doesn't seem to blow as hard as I would expect. AC temp is 60 degrees out of the vent but doesn't seem to have enough air flow to really cool down the interior. I have pulled the relay today and want to check it. There are 5 tabs, does anyone know which two are the coil side and which two are the contact side? I plan to put 12V on the coil and see if the contact side closes. Right now the two I am guessing to be the coil show continuity (good) and the contact two are open (not good). I want to be sure before I replace it.


 
1980 L82 (5069 made), Dark Green Metalic (844 made)
Gymkhana Suspension, AM/FM/CB, Sporting a ZZ383......... 
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Blower Relay

Posted: 6/26/04 7:49pm Message 2 of 5
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CUYAHOGA FALLS, OH - USA
Joined: 12/2/2003
Posts: 6424
Vette(s): 1975 C3 Red, T-Tops, Black Interior. All I need is time and money! Getting there!
There are three facing the same direction, and two the other direction. THe two different ones are the control circuit to actavite the relay. The tab with the purple wire is the feed to the blower motor. The red is constant battery power for high speed. The remaining wire is the low speeds input.


Blower Relay

Posted: 6/27/04 5:20am Message 3 of 5
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Canada
Joined: 11/27/2003
Posts: 147
Vette(s): 1974 T-top 454/400 auto w/delux interior, power windows, white w/black int.,American Racing mags w/Goodyear tires. previously owned... 1969 convertible - 427/390 auto w/hardtop 1965 coupe - 327/300 4 spd
Don't expect a lot of air flow. None of them blow very hard. Mostly just keeps your feet cooler.



Blower Relay

Posted: 6/27/04 8:11am Message 4 of 5
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ORLANDO, FL - USA
Joined: 12/11/2002
Posts: 459
Vette(s): 1980 L82 Dark Metallic Green Coupe, Gymkhana Suspension, AM/FM/CB, GM ZZ383....nice....
Thanks guys, I finally found the wiring diagram, that manual is not layed out well to find things. It is just as you said Ken. My coil side checks out good (continuity from O-Bk), the normal position good (continuity from B-P), my test battery is dead so I will need to get one today to activate the relay (O-Bk)and see if the contact closes for hi speed (R-P).


 
1980 L82 (5069 made), Dark Green Metalic (844 made)
Gymkhana Suspension, AM/FM/CB, Sporting a ZZ383......... 

Blower Relay

Posted: 7/3/04 11:37am Message 5 of 5
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Former Member
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ORLANDO, FL - USA
Joined: 12/11/2002
Posts: 459
Vette(s): 1980 L82 Dark Metallic Green Coupe, Gymkhana Suspension, AM/FM/CB, GM ZZ383....nice....
Update on relay. Relay tested good, apply 12VDC contact closes. Cleaned all contacts with emery cloth, reinstall, voila, fan blows stronger now. My guess is that the relay was good, but the connections for the contact side of the relay were dirty. |thumb|


 
1980 L82 (5069 made), Dark Green Metalic (844 made)
Gymkhana Suspension, AM/FM/CB, Sporting a ZZ383......... 

in Forum: C3 Electrical


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