Master relay - Pontiac GTO Forum
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post #1 of 4 (permalink) Old 01-19-2019, 11:48 PM Thread Starter
 
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Master relay

On my 1967 GTO with factory AC I need to replace the Master relay for the heater blower. There is currently an incorrect one there not working properly, but I have a correct one, a repopulated from OPGI. There are three terminals, numbered, and I know I need to connect the black with double orange stripe, the gray, and the brown wires to the relay, but the wiring diagram doesnít specify which wire goes to which terminal. Can anyone help me? A photo would be very helpful as well. Thanks!
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post #2 of 4 (permalink) Old 01-20-2019, 11:24 AM
 
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Here is the page from the '67 SM looking at as if it is on the firewall you will see the correct wire locations/routing.

GTO Jr. - A.K.A. SPRINT 6
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post #3 of 4 (permalink) Old 01-20-2019, 11:28 AM
 
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My 67 with factory air has a different relay than yours

My relay only has three connectors and it grounds to the chassis when the two blots are tight. There is a drop of solder on one of the tabs that holds the cover to the relay board and that is where the ground is made. See attached picture with arrow showing where the solder and connection point is on this relay.
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post #4 of 4 (permalink) Old 01-20-2019, 11:51 AM Thread Starter
 
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Thanks guys. I will try them as suggested, as laid out on the diagram with orientation being looking at it installed on firewall. And thanks for the photos, helps verify my correct parts.
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