LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Wiring electric water pump

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Old Mar 21, 2008 | 07:50 PM
  #1  
mdacton's Avatar
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Wiring electric water pump

What are you guys wiring them to so it comes on with ignition?

I have heard about running it off the airpump realy or something? I have never wired one to anything other than a switch.....But this is more of a street car, and I don't want anyone to forget to cut it on
Old Mar 21, 2008 | 08:01 PM
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Originally Posted by mdacton
What are you guys wiring them to so it comes on with ignition?

I have heard about running it off the airpump realy or something? I have never wired one to anything other than a switch.....But this is more of a street car, and I don't want anyone to forget to cut it on
Check this picture out and you'll see where I have it wired to - no issues!
http://picasaweb.google.com/calder.c...64242669466978

I used a piggyback connector.
Old Mar 22, 2008 | 02:19 AM
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95Blackhawk's Avatar
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CSR told me to ground to the same location as the battery. Said some F-bods have been known to have EWP's go out for some reason and the solution they said was to have a better ground.
Old Mar 22, 2008 | 06:48 AM
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Use the fan relay circuit as a trigger. That way you can run your EWP in
ACC while you're cooling down at the track (or otherwise).

http://www.projecttransam.com/projects9.asp

You could use the air pump circuit if you wanted to, this just seemed easier to be
since someone had already documented it with pretty pictures LOL
Old Mar 22, 2008 | 10:16 PM
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Originally Posted by James Montigny
Use the fan relay circuit as a trigger. That way you can run your EWP in
ACC while you're cooling down at the track (or otherwise).

http://www.projecttransam.com/projects9.asp

You could use the air pump circuit if you wanted to, this just seemed easier to be
since someone had already documented it with pretty pictures LOL
nice write up on the pump install.
Old Mar 23, 2008 | 01:53 PM
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'94 Bad A Z28's Avatar
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Mine is wired in to the fuse box under the hood... but I do not remember where, lol. It was wired on to the bottom of the fuse pannel, I'll go out later and look as to where exactly I wired it. But it's been there for something like 7 or 8 years and still good.
Old Mar 23, 2008 | 01:55 PM
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'94 Bad A Z28's Avatar
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Originally Posted by James Montigny
Use the fan relay circuit as a trigger. That way you can run your EWP in
ACC while you're cooling down at the track (or otherwise).

http://www.projecttransam.com/projects9.asp

You could use the air pump circuit if you wanted to, this just seemed easier to be
since someone had already documented it with pretty pictures LOL



I don't remember if that's where mine is wired in to or not, but my pump turns on in ACC too.
Old Mar 23, 2008 | 02:23 PM
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I use the a wire under the fuse box that comes on when the ignition is activated-that in turn powers up to relays I wired up to power the WP Its been like that for 3 years now with flawless performance, you can also just turn the key forward to turn the Ignition on and it powers up the water pump so it can run with the Engine off...I wouldnt recomend it though as it could run your battery pretty quick
Old Mar 23, 2008 | 03:18 PM
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Originally Posted by '94 Bad A Z28
I don't remember if that's where mine is wired in to or not, but my pump turns on in ACC too.
What's important is the circuit's amp rating. If you choose one that
is too low, you'll blow the fuse or, worse, the pump wont run.
Old Mar 23, 2008 | 06:00 PM
  #10  
'94 Bad A Z28's Avatar
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Yes I know this... like I said mine has been on the car for about 8 years now so I am pretty sure that I did a pretty good install, lol.
Old Mar 23, 2008 | 08:13 PM
  #11  
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Originally Posted by caldercay
What's important is the circuit's amp rating. If you choose one that
is too low, you'll blow the fuse or, worse, the pump wont run.


I used to pretty good size relays working together to supply power to the WP.......Just in case
Old Mar 23, 2008 | 09:25 PM
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I ended up using the fan relay as my ingnition trigger, wire a seperate relay with a 15 amp fuse in line. Soldered everything and heat shrink, works great
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