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Need help making this relay
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tootype2crazy
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PostPosted: Sun Oct 02, 2011 4:45 pm    Post subject: Need help making this relay Reply with quote

Hey guys. I'm wondering if any of you electrically smart people could tell me how to make one of these out of some generic automotive relays. I'm trying to put a BA4 gas heater out of a 411/412 in my bus and don't have this part. It's the double relay shown below.

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1978 Sunroof Deluxe Bus (daily driver)
1978 Transporter (mom's, making into a camper)
1970 Single Cab 2.1 turbo/EFI 6 Rib, 78 front beam, vanagon backing plates on rear (project)
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tootype2crazy
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PostPosted: Sun Oct 02, 2011 6:02 pm    Post subject: Reply with quote

No one? Surely there are some vw electrical geniuses on this forum.
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air-cooled or nothing for me
1978 Sunroof Deluxe Bus (daily driver)
1978 Transporter (mom's, making into a camper)
1970 Single Cab 2.1 turbo/EFI 6 Rib, 78 front beam, vanagon backing plates on rear (project)
2001 GTI VR6 (wife's)
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El_Güero
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PostPosted: Sun Oct 02, 2011 6:46 pm    Post subject: Reply with quote

tootype2crazy wrote:
No one? Surely there are some vw electrical geniuses on this forum.



im no genius but it seem like you need 3 relays, first one has to have the 87a conection

first one:

87a goes to E
30 goes to G
86 goes to H
85 goes to A

second one:

85 goes to 85 of the first one
86 goes to B
87 goes to E
30 goes to F

third one:

85 goes to second relays 85
86 goes to second relays 86
30 goes to C
87 goes to D

donpt know if thats absolutly right but it seems like that Confused
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tootype2crazy
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PostPosted: Sun Oct 02, 2011 6:58 pm    Post subject: Reply with quote

Hey thanks. I can't wrap my brain around this stuff. I will give this set up a try and check over all the routing and see if I can get it working. If anyone else wants to chime in, feel free.
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air-cooled or nothing for me
1978 Sunroof Deluxe Bus (daily driver)
1978 Transporter (mom's, making into a camper)
1970 Single Cab 2.1 turbo/EFI 6 Rib, 78 front beam, vanagon backing plates on rear (project)
2001 GTI VR6 (wife's)
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bugger101
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PostPosted: Sun Oct 02, 2011 7:09 pm    Post subject: Reply with quote

do you have a full size drawing.
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tootype2crazy
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PostPosted: Sun Oct 02, 2011 7:13 pm    Post subject: Reply with quote

here is the entire wiring diagram
http://manuals.type4.org/ba4/ch1/ba4_11f.html

regarding the above explanation, don't the relays with connection 87a also have 87, totalling 5 connections? What would I do with terminal 87 then?
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air-cooled or nothing for me
1978 Sunroof Deluxe Bus (daily driver)
1978 Transporter (mom's, making into a camper)
1970 Single Cab 2.1 turbo/EFI 6 Rib, 78 front beam, vanagon backing plates on rear (project)
2001 GTI VR6 (wife's)
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El_Güero
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PostPosted: Sun Oct 02, 2011 7:18 pm    Post subject: Reply with quote

tootype2crazy wrote:
here is the entire wiring diagram
http://manuals.type4.org/ba4/ch1/ba4_11f.html

regarding the above explanation, don't the relays with connection 87a also have 87, totalling 5 connections? What would I do with terminal 87 then?


don´t use it
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tootype2crazy
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PostPosted: Sun Oct 02, 2011 7:29 pm    Post subject: Reply with quote

here it is bigger
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air-cooled or nothing for me
1978 Sunroof Deluxe Bus (daily driver)
1978 Transporter (mom's, making into a camper)
1970 Single Cab 2.1 turbo/EFI 6 Rib, 78 front beam, vanagon backing plates on rear (project)
2001 GTI VR6 (wife's)
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busdaddy
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PostPosted: Sun Oct 02, 2011 8:01 pm    Post subject: Reply with quote

If it's anything like a BA-6 safety relay where are the resistors?, or are they separate on a BA-4?
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tootype2crazy
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PostPosted: Sun Oct 02, 2011 8:03 pm    Post subject: Reply with quote

No, this is not the safety relay, i have that already. This is a double relay involved in turning on the heater. The safety relay connects to this.
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air-cooled or nothing for me
1978 Sunroof Deluxe Bus (daily driver)
1978 Transporter (mom's, making into a camper)
1970 Single Cab 2.1 turbo/EFI 6 Rib, 78 front beam, vanagon backing plates on rear (project)
2001 GTI VR6 (wife's)
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Steve46038
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PostPosted: Mon Oct 03, 2011 9:51 am    Post subject: Reply with quote

Halfway through explaining this I realized just how dangerous this is.
Please have a professional check your design and test operation outside before installation. Do you need help finding the original parts?
That being said, this is how I would wire it. (I am not a pro, not even close)
Keep in mind, some relays are NO and some are NC...
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