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widefivebug
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Joined: May 29, 2003
Posts: 330
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 Posted: Fri Jul 21, 2017 8:04 am Post subject: Megasquirt 12v supply |
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I know this looks a little rough but its only to verify I have things connected correctly before I actually make the permanent connections.. Does this look like I have this wired correctly? Also I plan on taking switched power from the existing fuse box #1, or is there a better source?
86 - Ground
87 - New fuse box
30 - Existing fuse box switched power
85 - Source (megasquirt)
87A - Not used
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Dale M.
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Joined: April 12, 2006
Posts: 20379
Location: Just a tiny bit west of Yosemite Valley
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| Posted: Fri Jul 21, 2017 8:42 am Post subject: Re: Megasquirt 12v supply |
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Not sure of your terminology for "#85 Megasquirt"... Do you need NEW fuse panel for MS? Not sure of you configuration!
Are you trying to power up MS with relays or you trying to power relays from MS, what powers up MS?
#30 is generally supply voltage input to contact
#87 is generally out put contact (relay energized)...
#87a is generally out put contact (relay not energized)...
#85 is one side of relay coil (generally ground)
#86 is one side of relay coil (generally 12 volt power)
My though is #30 to unswitched power at existing fuse pane. (#1 position or other convient source (direct to battery under back seat))
#87 to input new fuse panel for MS (?)
#86 to ground..
#85 to control which would be ignition switch, ignition terminal
Got to wonder about all the funny looking blue taped connections though, looks like masking tape(?)..... How are connections made under tape... Also looks as if you have two relays tucked in there and wired in parallel...WHY?
Dale
_________________
“Fear The Government That Wants To Take Your Guns" - Thomas Jefferson.
"Kellison Sand Piper Roadster" For Street & Show.
"Joe Pody Sandrover" Buggy with 2180 for Autocross (Sold)
============================================================
All suggestions and advice are purely my own opinion. You are free to ignore them if you wish ...
Last edited by Dale M. on Fri Jul 21, 2017 9:55 am; edited 2 times in total |
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widefivebug
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Joined: May 29, 2003
Posts: 330
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| Posted: Fri Jul 21, 2017 9:43 am Post subject: Re: Megasquirt 12v supply |
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Thanks for the help Dale and be patient with me on this. First off there are no connections made under the blue. Tape is just holding wires together until I make sure I have this right. It was the only tape I could find at the time.
To clarify in my mind what you said this is how I am wiring,
#30 Battery
#85 One side coil relay & fused terminal on new fuse box
#86 Ground
#87 Power supply to new fuse panel |
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Dale M.
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Joined: April 12, 2006
Posts: 20379
Location: Just a tiny bit west of Yosemite Valley
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| Posted: Fri Jul 21, 2017 10:09 am Post subject: Re: Megasquirt 12v supply |
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| vwnutt wrote: |
Thanks for the help Dale and be patient with me on this. First off there are no connections made under the blue. Tape is just holding wires together until I make sure I have this right. It was the only tape I could find at the time.
To clarify in my mind what you said this is how I am wiring,
#30 Battery
#85 One side coil relay & fused terminal on new fuse box
#86 Ground
#87 Power supply to new fuse panel |
Ummm.... No....
Output of relay #87 goes to main stud on fuse panel you have it to a fuse position...
#85 has to come from a control source, normally same as coil on conventional ignition system, Key on relay operates, key off relay Non operate.. Controls power to new fuse panel ... You can not use new fuse panel as power source to energize relay becasue relay can not turn on becasue relay controls power to fuse panel...
Dale
_________________
“Fear The Government That Wants To Take Your Guns" - Thomas Jefferson.
"Kellison Sand Piper Roadster" For Street & Show.
"Joe Pody Sandrover" Buggy with 2180 for Autocross (Sold)
============================================================
All suggestions and advice are purely my own opinion. You are free to ignore them if you wish ... |
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raul arrese
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Joined: July 23, 2006
Posts: 1330
Location: miami florida
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| Posted: Fri Jul 21, 2017 10:10 am Post subject: Re: Megasquirt 12v supply |
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The way I see it is your using the megasquirt to trigger the relay to power up the new fuse panel ?? that's how im understanding you ...
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widefivebug
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Joined: May 29, 2003
Posts: 330
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| Posted: Fri Jul 21, 2017 10:20 am Post subject: Re: Megasquirt 12v supply |
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| I'm wanting switched power to the megasquirt. I was using the relay and a second fuse panel to avoid running all the wires up to the front of the car. |
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Dale M.
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Joined: April 12, 2006
Posts: 20379
Location: Just a tiny bit west of Yosemite Valley
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| Posted: Fri Jul 21, 2017 10:23 am Post subject: Re: Megasquirt 12v supply |
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This is how I perceived was proper way to power up MS. This is what I was intending to use when I was contemplating MS in autocross buggy.... This was my way of not using relay board...
Dale
_________________
“Fear The Government That Wants To Take Your Guns" - Thomas Jefferson.
"Kellison Sand Piper Roadster" For Street & Show.
"Joe Pody Sandrover" Buggy with 2180 for Autocross (Sold)
============================================================
All suggestions and advice are purely my own opinion. You are free to ignore them if you wish ... |
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Dale M.
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Joined: April 12, 2006
Posts: 20379
Location: Just a tiny bit west of Yosemite Valley
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| Posted: Fri Jul 21, 2017 10:26 am Post subject: Re: Megasquirt 12v supply |
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| vwnutt wrote: |
| I'm wanting switched power to the megasquirt. I was using the relay and a second fuse panel to avoid running all the wires up to the front of the car. |
IT will work with out running everything up to front of car, you can tap 12 volts at battery and get power to operate relay from coil wire as it goes through harness under back seat...
Dale
_________________
“Fear The Government That Wants To Take Your Guns" - Thomas Jefferson.
"Kellison Sand Piper Roadster" For Street & Show.
"Joe Pody Sandrover" Buggy with 2180 for Autocross (Sold)
============================================================
All suggestions and advice are purely my own opinion. You are free to ignore them if you wish ...
Last edited by Dale M. on Fri Jul 21, 2017 10:49 am; edited 1 time in total |
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widefivebug
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Joined: May 29, 2003
Posts: 330
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| Posted: Fri Jul 21, 2017 10:37 am Post subject: Re: Megasquirt 12v supply |
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| Dale M. wrote: |
| vwnutt wrote: |
| I'm wanting switched power to the megasquirt. I was using the relay and a second fuse panel to avoid running all the wires up to the front of the car. |
IT will work with out running everything up to front of car, you can tap 12 volts at battery and get power to operate relay for coil wire as it goes through harness under back seat...
Dale |
This sounds like the best idea. |
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raul arrese
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Joined: July 23, 2006
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Location: miami florida
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| Posted: Fri Jul 21, 2017 10:43 am Post subject: Re: Megasquirt 12v supply |
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Dale the schematic doesn't look bad but your coil relay needs to be triggerd by the signal coming from the M.S. for the fuel pump , I had mine like that and every once in a while when I would turn on my key switch it would backfire thrw the Exhaust without even cranking , what happens is that the m.s. hasn't established where it is in the crank wheel and it will just fire whatever fuel is in cylinder .. So that's why you use the fuel pump trigger , it powers up from the Ecu after it see's whats going on with the crank sensor . does that make sense ?? I didn't believe it either but it fixed the problem .
_________________
" Hot vw feature , may 2014 issue "
" 2013 Bug Jam class winner "
" Bug Jam best motor and best paint "
" 2013 Lakeland Classic Best of Show "
" 2014 Show and Shine , First in class "
"
Like my facebook https://www.facebook.com/pages/Raul-Arrese-custom-fabrication-and-performance/1832968110262608 |
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Dale M.
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Location: Just a tiny bit west of Yosemite Valley
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| Posted: Fri Jul 21, 2017 10:45 am Post subject: Re: Megasquirt 12v supply |
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Think this is more how you want to wire relay...
Dale
_________________
“Fear The Government That Wants To Take Your Guns" - Thomas Jefferson.
"Kellison Sand Piper Roadster" For Street & Show.
"Joe Pody Sandrover" Buggy with 2180 for Autocross (Sold)
============================================================
All suggestions and advice are purely my own opinion. You are free to ignore them if you wish ... |
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raul arrese
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Joined: July 23, 2006
Posts: 1330
Location: miami florida
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| Posted: Fri Jul 21, 2017 10:46 am Post subject: Re: Megasquirt 12v supply |
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In my car I got the factory positive going to coil from the key and used it to trigger the relays out back for the M.S. your fuses and relays will get power right from battery under seat , the fuel pump relay and coil relay are tigger by the M.s. fuel pump output ..
_________________
" Hot vw feature , may 2014 issue "
" 2013 Bug Jam class winner "
" Bug Jam best motor and best paint "
" 2013 Lakeland Classic Best of Show "
" 2014 Show and Shine , First in class "
"
Like my facebook https://www.facebook.com/pages/Raul-Arrese-custom-fabrication-and-performance/1832968110262608 |
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Dale M.
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Posts: 20379
Location: Just a tiny bit west of Yosemite Valley
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| Posted: Fri Jul 21, 2017 10:57 am Post subject: Re: Megasquirt 12v supply |
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| raul arrese wrote: |
| Dale the schematic doesn't look bad but your coil relay needs to be triggerd by the signal coming from the M.S. for the fuel pump , I had mine like that and every once in a while when I would turn on my key switch it would backfire thrw the Exhaust without even cranking , what happens is that the m.s. hasn't established where it is in the crank wheel and it will just fire whatever fuel is in cylinder .. So that's why you use the fuel pump trigger , it powers up from the Ecu after it see's whats going on with the crank sensor . does that make sense ?? I didn't believe it either but it fixed the problem . |
I think it is... Note date on schematic, was long time ago and never happened... Still the thought of doing street buggy though, really need to find some really clean Weber idf form factor TB's though but kind of hesitate and the $$$ they are asking is a bit much... Anyway buggy runs great on the HPMX's right now...
Dale
_________________
“Fear The Government That Wants To Take Your Guns" - Thomas Jefferson.
"Kellison Sand Piper Roadster" For Street & Show.
"Joe Pody Sandrover" Buggy with 2180 for Autocross (Sold)
============================================================
All suggestions and advice are purely my own opinion. You are free to ignore them if you wish ...
Last edited by Dale M. on Fri Jul 21, 2017 11:34 am; edited 1 time in total |
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Sacr32
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Joined: March 19, 2005
Posts: 46
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| Posted: Fri Jul 21, 2017 11:01 am Post subject: Re: Megasquirt 12v supply |
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| Did you get the wiring diagram from Mario? |
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raul arrese
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Joined: July 23, 2006
Posts: 1330
Location: miami florida
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| Posted: Fri Jul 21, 2017 11:01 am Post subject: Re: Megasquirt 12v supply |
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| Dale M. wrote: |
| raul arrese wrote: |
| Dale the schematic doesn't look bad but your coil relay needs to be triggerd by the signal coming from the M.S. for the fuel pump , I had mine like that and every once in a while when I would turn on my key switch it would backfire thrw the Exhaust without even cranking , what happens is that the m.s. hasn't established where it is in the crank wheel and it will just fire whatever fuel is in cylinder .. So that's why you use the fuel pump trigger , it powers up from the Ecu after it see's whats going on with the crank sensor . does that make sense ?? I didn't believe it either but it fixed the problem . |
I think kit is... Note date on schematic, was long time ago and never happened... Still the thought of doing street buggy though, really need to find some really clean Weber idf form factor TB's though but kind of hesitate and the $$$ they are asking is a bit much... Anyway buggy runs great on the HPMX's right now...
It looks good , basically what I have under my back seat ..
Dale |
It looks good , basically what I have under my back seat ..
_________________
" Hot vw feature , may 2014 issue "
" 2013 Bug Jam class winner "
" Bug Jam best motor and best paint "
" 2013 Lakeland Classic Best of Show "
" 2014 Show and Shine , First in class "
"
Like my facebook https://www.facebook.com/pages/Raul-Arrese-custom-fabrication-and-performance/1832968110262608 |
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widefivebug
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Joined: May 29, 2003
Posts: 330
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| Posted: Fri Jul 21, 2017 11:13 am Post subject: Re: Megasquirt 12v supply |
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| Dale M. wrote: |
Think this is more how you want to wire relay...
Dale |
Fuse panel threaded stud yellow (87A) or red (87)?
Wires for coil relay will go to new fuse panel, right?
If I understand this now correctly, one relay is all thats needed now to the new fuse panel. |
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Dale M.
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Joined: April 12, 2006
Posts: 20379
Location: Just a tiny bit west of Yosemite Valley
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| Posted: Fri Jul 21, 2017 11:33 am Post subject: Re: Megasquirt 12v supply |
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| vwnutt wrote: |
| Dale M. wrote: |
Think this is more how you want to wire relay...
Dale |
Fuse panel threaded stud yellow (87A) or red (87)?
Wires for coil relay will go to new fuse panel, right?
If I understand this now correctly, one relay is all thats needed now to the new fuse panel. |
By the numbers My #87 is Yellow and #87a is Red... Colors are for people and not always correct, depend on who made relay socket... Wire by the numbers...
My relay socket is :
30 - Blue
85 - White
86 - Black
87 - Yellow
87a - Red
Yours may not be the same... Chart yours, make lots of notes... Print out any diagrams you see online that help... Documentation/pictures is everything when you have to trouble shoot...
Dale
_________________
“Fear The Government That Wants To Take Your Guns" - Thomas Jefferson.
"Kellison Sand Piper Roadster" For Street & Show.
"Joe Pody Sandrover" Buggy with 2180 for Autocross (Sold)
============================================================
All suggestions and advice are purely my own opinion. You are free to ignore them if you wish ... |
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widefivebug
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Joined: May 29, 2003
Posts: 330
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| Posted: Fri Jul 21, 2017 12:44 pm Post subject: Re: Megasquirt 12v supply |
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Hopefully I think I finally got it. My colors are different from yours which was not helping me. My colors are:
87A Yellow
87 Blue
86 White
85 Black
30 Red
Thank you for all the help. Hopefully I should be able to fire this off in a couple days. |
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Paul.H
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Posts: 613
Location: England
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| Posted: Fri Jul 21, 2017 1:05 pm Post subject: Re: Megasquirt 12v supply |
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| Dale M. wrote: |
This is how I perceived was proper way to power up MS. This is what I was intending to use when I was contemplating MS in autocross buggy.... This was my way of not using relay board...
Dale |
If you run the ECU power from the relay you can get enough residual current to keep the engine running after turning off the ignition. I just wire the ECU direct to the ignition feed through the fuse |
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widefivebug
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Posts: 330
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| Posted: Sun Jul 23, 2017 2:47 am Post subject: Re: Megasquirt 12v supply |
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| Thank you guys for the help with this. Finally got the wiring finished. Hopefully in a few days I should be able to fire this up for the first time. |
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