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#1 |
Registered User
Join Date: Jun 2000
Location: Chico, CA
Posts: 1,136
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Electrical Question (Relays)
I had a question about relays and was wondering if anyone knowledgeable in auto electronics could help me out. On a relay, what do each of the different lugs do? There is 30, 85, 86, 87, and 87a. I know that a relay is like an electronic switch used to take the load off of a switch, when switching a high draw component like an elec. fan, fuel pump, etc..... but I would like to know how these different wires work. This question pertains to the fact that I just bought a keyless entry system and I'm thinking about wiring up power windows to work with my remote...... and the fact that I'd just like to know how a relay works. Thanks for any help.
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#2 |
I am a Referee of life.
Join Date: Jun 2000
Location: Greensboro N.C.
Posts: 13,993
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I can't tell you which is which by the #/letter system you posted, but basically a relay is just an electrically operated switch.It uses a coil that creates a magnetic field to pull in a set of contacts. So on most relays you have a power to the coil(usually powered by a switch or other device). A ground for the coil(self explanatory). A hot for the contacts(this hot could be switched thru the ignition but usually isn't).The other two wires on the relay are a n.c(normally closed,closed when the relay is off). The last is n.o.(normally open,open when the relay is off).I don't have a wiring diagram that's postable but you should be able to find one on the web somewhere.
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#3 | |
Seņor Member
Join Date: May 2002
Location: Edge of the world
Posts: 5,367
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Re: Electrical Question (Relays)
Quote:
I hope this helps. Kenneth
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#4 |
Registered User
Join Date: May 2000
Location: Petrolia,Ontario,Canada but working in Port Huron,Mi.
Posts: 1,771
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Here ared a couple diagrams for you.
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71 blazer,350SBC,approx.375HP,700R4,factory GM TPI.Dual electric fans,33x12.5x15 ATR on stock suspension. Petrolia,Ontario,Canada but working in Port Huron,MI. See ALL my Blazer pic's HERE |
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#5 |
Registered User
Join Date: May 2000
Location: Petrolia,Ontario,Canada but working in Port Huron,Mi.
Posts: 1,771
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another
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71 blazer,350SBC,approx.375HP,700R4,factory GM TPI.Dual electric fans,33x12.5x15 ATR on stock suspension. Petrolia,Ontario,Canada but working in Port Huron,MI. See ALL my Blazer pic's HERE |
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