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1981 power antenna wiring

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Old Jul 18, 2013 | 08:18 AM
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Default 1981 power antenna wiring

OK, wiring appears to be fine. I unplugged the relay (behind passenger seat in cargo area) and it stopped the humming noise (power to antenna). Guess my next step is to replace the relay. However, it comes all wired up. Can I just cut and splice the new relay to the existing wires going to the antenna? Looks like a real chore to pull out and replace all the old wiring. Thanks much..


I replaced the mast in my 1981 Vette power antenna. Pain in the butt getting to it but removed it and replaced antenna mast and reinstalled. It worked but with a 15-20 second pause before raising or lowering. Next day my battery was dead. I hear a constant low humming noise coming from the antenna motor when charging the battery and it must be draining my battery. Thought I wired it back the same way but must have screwed it up. Can anyone help with a wiring diagram or description on how the 1981 power antenna should be wired? Thanks

Last edited by Simpsontw; Jul 19, 2013 at 11:17 AM. Reason: next step in solving antenna problem
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Old Jul 19, 2013 | 12:20 AM
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I have the '81 GM manual w/ the wiring diagram, etc.. If you haven't already gotten the correct hook-up, let me know, I'll help you. Sincerely, Jimmy. Oh I c, u just posted today. OK.

red wire (hot all the time) from your "ctsy clk" fuse(20 amp) to relay.
yellow wire(hot w/ ign. switch in accy and on) from "radio" fuse(10 amp)to relay.
grey wire from antenna motor (up) to relay.
green wire from antenna motor(M) to relay.
white wire from antenna motor(down) to relay.
black wire from relay to ground.

*Let me know if this gets it.

Last edited by texas jim; Jul 19, 2013 at 12:34 AM.
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Old Jul 19, 2013 | 07:00 AM
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Had a similar problem on mt 79,the relay under the armrest was bad allowing the motor to run and drain battery.
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Old Jul 19, 2013 | 07:15 AM
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Thanks Texas Jim......will work it some more
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Old Jul 19, 2013 | 11:17 AM
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OK, wiring appears to be fine. I unplugged the relay (behind passenger seat in cargo area) and it stopped the humming noise (power to antenna). Guess my next step is to replace the relay. However, it comes all wired up. Can I just cut and splice the new relay to the existing wires going to the antenna? Looks like a real chore to pull out and replace all the old wiring. Thanks much..
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Old Jul 19, 2013 | 11:32 AM
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Originally Posted by Simpsontw
OK, wiring appears to be fine. I unplugged the relay (behind passenger seat in cargo area) and it stopped the humming noise (power to antenna). Guess my next step is to replace the relay. However, it comes all wired up. Can I just cut and splice the new relay to the existing wires going to the antenna? Looks like a real chore to pull out and replace all the old wiring. Thanks much..
I don't like modifying new components either. Surely there is someone on here who has been thru this and has the answer to "the best way" to go about this.

If there is anything else I can look up f/ you in the GM manual, just let me know, I'd be glad to do it. The manual, '81 GM Corvette Shop Manual," was bought f/ 10 dollars w/ the car new, an offer in the Corvette owners manual. I'm second owner of my 'Vette, and since my father-in-law, the original owner, wasn't a "wrench turner," the manual is in good order and non-greasy. LOL! You may want to look into getting one of these manuals from the parts dept. at the Chevy dealer. Although they're expensive when not bought w/ the car, they do contain a lot of good info, the best manual I've ever had f/ a vehicle. But like I said, you can, anytime, give me a yell, and I'll give you any and all the info you need from the manual. Again, I'm glad I can help. Sincerely.

Last edited by texas jim; Jul 19, 2013 at 11:38 AM.
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