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11-03-2008, 11:20 PM
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#1 |
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Registered User
 
Join Date: Dec 2006
Location: Pueblo West
Posts: 264
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head light relay mod
Hey Guy's I'm doing the headlight relay mod and I can't find any info on what to do with the 5th prong. All the write up's I can find is about four prong relays. Thanks In Advance
LYTEMUP- 
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11-03-2008, 11:32 PM
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#2 |
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Sierra Grande Club
Join Date: Jan 2007
Location: New Mexico USA
Posts: 2,433
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Re: head light relay mod
__________________
1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe. 
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11-03-2008, 11:37 PM
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#3 |
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Registered User
Join Date: Mar 2006
Location: AZ
Posts: 372
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Re: head light relay mod
Usually the NC (Normally closed) side of the relay. Circuit opens when relay is energized. I cant see why it would be used.
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11-03-2008, 11:45 PM
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#4 |
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Registered User
Join Date: Dec 2006
Location: Pueblo West
Posts: 264
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Re: head light relay mod
sweet Thats what i needed to know thanks alot!!!!!
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11-04-2008, 04:17 AM
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#5 |
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someday it will be done!
Join Date: Sep 2004
Location: Lloydminster,AB. Canada
Posts: 1,620
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Re: head light relay mod
You're gonna like the difference.Definitely big bang to buck value.
__________________
'72 C-10 Proud owner of a million new and used pieces that used to be and will once again be(god willing) a testament to the term "they don't build em like that anymore.    '80 LWB 2wd beater '67 GMC long fleet (cab donor) '66 long step (parked till it's turn comes around) '65 short step (parts truck that will donate it's bed and possibly frame to the '66) '06 Grand Prix wife's car (she hardly lets me touch it) my pics |
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11-04-2008, 09:00 AM
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#6 |
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Registered User
Join Date: Aug 2008
Location: DFW, Texas
Posts: 389
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Re: head light relay mod
you dont need the 5th prong. Those relays typically work like:
30 - constant power from battery 85 - ground 86 - trigger wire 87 - power wire to accessory when trigger wire is + 87a - power wire to accessory when trigger wire is - |
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