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Thread: Circuit opening relay bypass unit query

  1. #16
    Junior Member Automotive Encyclopaedia
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    Default Re: Circuit opening relay bypass unit query

    on the Cressida just wire up the cor trigger
    its a green wire
    piss of the fpr wire plus also goto engine bay and bridge the 2 wires together that are for the fuel pump 2 speedo relay and resistor

    this is y I run the modified peel switches
    work from rpm from 1j 2j ignitor and trigger the Cressida cor properly
    nothing else needed and much less chance of failing hehe

  2. #17
    Forum Member Grease Monkey
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    Default Re: Circuit opening relay bypass unit query

    After looking at options I have decided to go with the Toyota Fuel Pump Control PN # 89570-14240 which connects to ground, DI, FPC and the EFI M/REL circuit. It also doesn't need the Toyota COR or fuel pump relays, and still controls the pump speed.

    So I picked up existing factory wires as shown in the attachments and threw the COR & fuel pump relays in a box.

    I also looked at the Peel relay/switch CP-30 and made a wiring diagram for the off the shelf item along with a regular relay, see CP30 and relay to MX83 attachment. It also would use mostly existing factory wiring and get rid of the Toyota relays.

    I couldn't work out how to include the fuel pump resistor circuit with the CP-30 setup though.

    Cheers
    Attached Images Attached Images
    Last edited by ujw296; 15-11-2014 at 04:57 PM.

  3. #18
    Forum Member Grease Monkey
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    Default Re: Circuit opening relay bypass unit query

    Thanks wilbo666
    The bloke that made the magic box took it away to test and no response as yet???

  4. #19
    Junior Member Automotive Encyclopaedia
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    Default Re: Circuit opening relay bypass unit query

    y r u running the resistor
    the best thing is to piss it off especially in a conversion

    u are over complicating it again and I got no idea what yr trying to achieve in yr diagram

    the rpm relays cannot power a fuel pump
    only trigger a relay

    why not just do this

    find the green cor trigger wire in big grey plug
    hook it up to a switch and then ground it

  5. #20
    Forum Member Grease Monkey
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    Default Re: Circuit opening relay bypass unit query

    If you read my post again you will note that I am actually running the Toyota fuel pump control.
    I mentioned the fuel pump resistor not being utilised with the modification for those people who may want to retain it has intended by Toyota engineers, to lengthen fuel pump service life.
    The diagram is actually a slightly modified version of what Peel Instruments actually sent me using the CP-30 AND a suitable relay for the pump load! They couldn't see why I would need one of your $70 custom switches.
    I Personally would rather not retain the expensive Toyota COR & fuel pump relays but that is my choice.
    I would also like the fuel pump to stop if the engine stops, again like manufacturers design them.
    Last edited by ujw296; 19-11-2014 at 10:40 PM.

  6. #21
    Forum Member Grease Monkey
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    Default Re: Circuit opening relay bypass unit query

    Attached are a couple of pics showing the CP-30 and a pump relay wired up and working well. The NEG COIL (impulse/trigger) wire only needs coiling round the igniter HT lead a few times as shown.
    I used the original resistor wire and ECU T5 FPR wire by bridging them at the fuel pump relay socket, that way it is neat and saves running more wires.
    I have set it up so it can be easily connected up if my Supra fuel pump control should fail, this will allow me to get around safely till I find another.

    A pretty cheap system at $30.00 for the Peel CP-30 even if only used as a backup.
    It all fits neatly behind the glove box but is still easily accessible if need be.
    Attached Images Attached Images
    Last edited by ujw296; 18-12-2014 at 09:56 PM.

  7. #22
    Junior Member Automotive Encyclopaedia
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    Default Re: Circuit opening relay bypass unit query

    well 70 bucks included freight plus I need to make 200% mark up on the person I got it off
    and he needs to make 300% mark up from the person he got it off etc etc

    my ones will trigger factory Toyota COR relays

    the other ones need another relay added in
    I mainly use these for direct plug in mail order looms where the customer doesn't have to worry about
    wiring other relays and stuff to get the factory fuel pump wiring working on most older Toyota cars

    just get the peel one as I don't even get out of bed for tight asses who cant afford 70 bucks hahaha

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