grantf Posted February 2, 2012 Share #1 Posted February 2, 2012 I am thinking of doing a headlight relay upgrade for my 280z. though I have though about David Irwin's upgrade his is not compatible with a 280z, so I am thinking of doing a hardwired upgrade. So no I am trying to find the best relay to use. Would this work? http://www.amazon.com/Absolute-RLS125-12-VCD-Automotive-Relay/dp/B0002KR9GGit has 5 pins not four though. Link to comment Share on other sites More sharing options...
KAL7467 Posted February 2, 2012 Share #2 Posted February 2, 2012 Those are the same relays I have at my shop and plan on using on my 240z. Link to comment Share on other sites More sharing options...
beermanpete Posted February 2, 2012 Share #3 Posted February 2, 2012 These are good.http://www.parts-express.com/pe/showdetl.cfm?Partnumber=330-070&FTR=330-070 Link to comment Share on other sites More sharing options...
grantf Posted February 2, 2012 Author Share #4 Posted February 2, 2012 I thought about the amazon ones because it seemed to be a good deal with the socket and fuse holder bundled. Link to comment Share on other sites More sharing options...
EScanlon Posted February 2, 2012 Share #5 Posted February 2, 2012 That "fifth" pin is to INVERT the relay's operation from turning ON a device to turning it OFF (or turning one device on while turning another off)This page on the second link providec by Beerman has some additional explanations on other uses as well as a pin explanation of your relay.http://www.parts-express.com/resources/automotive-relays.cfm FWIWE Link to comment Share on other sites More sharing options...
grantf Posted February 2, 2012 Author Share #6 Posted February 2, 2012 So 87a would be left out of the circuit? Link to comment Share on other sites More sharing options...
EScanlon Posted February 2, 2012 Share #7 Posted February 2, 2012 Correct.E Link to comment Share on other sites More sharing options...
grantf Posted February 2, 2012 Author Share #8 Posted February 2, 2012 Ok I am going to order the amazon ones. The cost is so low what can I really loose? Link to comment Share on other sites More sharing options...
Zed Head Posted February 2, 2012 Share #9 Posted February 2, 2012 I'm a fan of wrecking yard relays just because it seems like old BMW is probably better than new aftermarket. My opinion, I could be wrong.Those are typical Bosch relays and can be found under the hood of any BMW. They're numbered and labeled by amperage. Most come with an internal diode or resistor also to quench the high voltage spike that happens when the switch is turned off. Probably not a problem on a headlight circuit but a little extra insurance. Just a little more to think about. Plus I like wandering the junk yard, it's like visiting a museum. Link to comment Share on other sites More sharing options...
grantf Posted February 2, 2012 Author Share #10 Posted February 2, 2012 That "fifth" pin is to INVERT the relay's operation from turning ON a device to turning it OFF (or turning one device on while turning another off)EJust like a threeway switch in you're home, no? Link to comment Share on other sites More sharing options...
LeonV Posted February 2, 2012 Share #11 Posted February 2, 2012 (edited) I got a set of five relays plus sockets from ebay for something like $15 shipped.FWIW,LeonEDIT: Here they are: http://www.ebay.com/itm/5-PACK-12V-DC-30A-40A-Relay-Socket-SPDT-Bosch-Style-/390386557009?pt=LH_DefaultDomain_0&vxp=mtr&hash=item5ae4da2051 Edited February 2, 2012 by LeonV Link to comment Share on other sites More sharing options...
rcb280z Posted February 2, 2012 Share #12 Posted February 2, 2012 David made parking light upgrade and headlight upgrade harness's for my 77 280 and they work perfect. Link to comment Share on other sites More sharing options...
Yarb
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