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Disaster06 Samba Member
Joined: March 22, 2017 Posts: 543 Location: Huntington Beach, CA
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Posted: Fri Apr 16, 2021 11:00 pm Post subject: Electric fuel pump relay |
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Hey guys, new to the late bay section, I hang out in the late model type 1 forum but my Dad picked up a 72 bus and we are installing an electric fuel pump. He purchased a relay (5 prong) and we can’t find a wiring diagram.
I dont have it on with me currently but I want to say it has the following pins
30 (or maybe 31) 85,86,87 and 87a?
I have come across a thread where someone had installed a relay but they didn’t show where the wires went. Can anyone help me out? Trying to bring this bus back to life.
Here’s a few pics for fun
Thanks!
Nick
_________________ 1968 Beetle Sedan |
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pioneer1 Samba Member
Joined: February 11, 2008 Posts: 2069 Location: Ontario Canada
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Posted: Sat Apr 17, 2021 2:43 am Post subject: Re: Electric fuel pump relay |
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Google has good diagrams _________________ "Always waiting for tomorrow ruined everything"
'85 Porsche 911 Targa
'76 Westfalia project |
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Disaster06 Samba Member
Joined: March 22, 2017 Posts: 543 Location: Huntington Beach, CA
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Posted: Sat Apr 17, 2021 7:15 am Post subject: Re: Electric fuel pump relay |
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I tried that but couldn’t find any specific to VW. A lot are for later cars. I read on a thread here that someone had done it and they called out ground, fused power, and I think one to each side of the coil but he just listed them off as 1,2,3,4,5 and not what pins they go to so it wasn’t very helpful but I’ll keep googling. _________________ 1968 Beetle Sedan |
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HoboBus Samba Member
Joined: December 29, 2016 Posts: 347 Location: Massachusetts
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Posted: Sat Apr 17, 2021 8:00 am Post subject: Re: Electric fuel pump relay |
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From the terminal numbers you gave, it sounds like a standard relay, often called an "ice cube relay", because it's square and about the size of an ice cube.
Lots of diagrams in the gallery here. Like this one.
Good luck. _________________ Salt air it ain't thin, it'll stick right to your skin,
it'll make you feel fine. Makes you feel fine.
And I wanna be there. -- Jimmy Buffett
Just a beach-oriented camping Hobo with a bus. |
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Disaster06 Samba Member
Joined: March 22, 2017 Posts: 543 Location: Huntington Beach, CA
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Posted: Sat Apr 17, 2021 8:43 am Post subject: Re: Electric fuel pump relay |
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Thanks! That’s very helpful. Do you need to hook up the 87a in the center to anything or can that be left alone (maybe for other applications?) _________________ 1968 Beetle Sedan |
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busdaddy Samba Member
Joined: February 12, 2004 Posts: 51153 Location: Surrey B.C. Canada, but thinking of Ukraine
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Posted: Sat Apr 17, 2021 8:47 am Post subject: Re: Electric fuel pump relay |
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87a is powered when the relay is static and cuts off when you apply power to 86, leave it alone for your application. _________________ Rust NEVER sleeps and stock never goes out of style.
Please don't PM technical questions, ask your problem in public so everyone can play along. If you think it's too stupid post it here
Stop dead photo links! Post your photos to The Samba Gallery!
Слава Україні! |
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ToolBox Samba Member
Joined: January 27, 2004 Posts: 3439 Location: Detroit, where they don't jack parts off my ride in the parking lot of the 7-11
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Posted: Mon Apr 19, 2021 9:22 am Post subject: Re: Electric fuel pump relay |
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Use a rabbit pump relay and wire it like this, pay no attention to the fuse block connections. It will cut power to the pump if the engine stops running.
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