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Relays...how many is enough?

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Old Oct 1, 2008 | 04:05 PM
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Default Relays...how many is enough?

I plan on converting my stock wiring harness myself....doesn't seem like it'll be as easy as some guys say, but I think I'll be ok. The only thing that has me a bit confused is how many relays I require. So far here's what I plan on having: 3 relays for fans (GM low/fast setup), 1 relay fuel pump, 1 relay A/C, and....? what else?
Pics of your fusebox/relay setup would be cool! I'd like to possibly place in the car possibly. It's a 1st Gen F-body btw.
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Old Oct 1, 2008 | 04:25 PM
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I also use relays for my head lights. Check out the technical articles here:

http://www.madelectrical.com/

He has some excellent ideas on updating the wiring in 60 vinatge cars.

Pat
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Old Oct 1, 2008 | 05:01 PM
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I've got 7 for the engine, 2 for the air compressors, but haven't finished the A/C stuff yet. I'll do that when everything is up and running. I have a few pictures in my build thread. I have all the relays and fuse blocks under the dash with the stock fuseblock, with all the wires running through the factory firewall junction.
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Old Oct 1, 2008 | 10:14 PM
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Wonder, will the require two relays for 2001 Camaro's OEM Halogen headlights?
I have been working on my 01' Camaro Cabred LS2 without PCM. I would use OEM Camaro Headlights.
I will try make draw where the wiring lines of headlight and fuse box goes to be connected. Hope it would be work.
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Old Oct 1, 2008 | 10:23 PM
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I have 6, 3 in a GM fuse block, and 3 external. the three in the block are: 2 for run/start circuits, and 1 for fuel pump, the other 3 are cooling fan 1 and 2 and my water pump for the magnacharger intercooler.





The block is out of a mid 90's Lumina, heres a link to my write up, post 143-146:
https://ls1tech.com/forums/showthrea...=686692&page=8
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Old Oct 1, 2008 | 11:32 PM
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I have 30A relays and I use
3 for the engine (one for the sensors:MAF,O2 etc, one for odd injectors and coils, and a third for even injectors and coils)
I have 1 relay for the fuel pump
and 3 relays for the fans.

They are all in a mid 90`s v6 camaro relay/fuse center. Pics are on my fquick account
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Old Oct 2, 2008 | 02:44 AM
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Wow! Thanks for all the great replies!
Another question is do the injectors/coils need relays, or is it just a better setup for consistent voltage?
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Old Oct 2, 2008 | 07:29 AM
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I guess you dont HAVE to have relays for them, but like you said, you're sure to have more voltage at the parts, rather than dropping slightly through your ignition switch.
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Old Oct 2, 2008 | 05:29 PM
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Your 40 year old ignition switch has seen better days, and the repop ones are junk. Use relays!

I have 7 relays not including the AC, because I used cheap 30A Bosch relays for all of it. Could have combined some of those if I had used a bigger relay.

http://www.blown.net/cars/camaro68/l...1t56wiring.doc



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