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-   -   1990 Honda Civic 1.5 DX won't start!HELP! (https://www.askmehelpdesk.com/showthread.php?t=40831)

  • Nov 30, 2006, 04:20 PM
    TxGreaseMonkey
    Advance Auto, Autozone, Honda, and RockAuto.com, among others, carry them. Make sure it's a Fuel Injection Main Relay for your year and model Civic. Here's an idea of what they should look like and cost:

    http://www.partsamerica.com/ProductL...ection%20Relay
  • Dec 2, 2006, 10:09 AM
    CoB_hatecrew
    OK I took out the wrong thing it only has four prongs... how the hell do I get the main one out... do I have to take the dash off because I was upside down under my fuse box and could not find that main relay
  • Dec 2, 2006, 10:12 AM
    TxGreaseMonkey
    Did you turn your ignition switch on and off to help you locate it? Have someone else turn the switch on and off and you get down and listen on the passenger side of the car.

    Are you sure the main relay doesn't have just 4 prongs on your year Civic?

    I sent you the wrong link. Here's what your main relay should look like:

    http://www.partsamerica.com/ProductL...ection%20Relay
  • Dec 2, 2006, 10:21 AM
    CoB_hatecrew
    I went on a site that posted pictures from a auto book for my year civic and it showed it to be on like the far left side close to the dash but all I can see is where the pillar connects to the body... and when I search for main relay for my year model and engine size it shows a main relay with either 7 or 8 prongs... its on the driver side for sure I just can't find it... and am really going to dread it if I have to take the dash apart to find it
  • Dec 2, 2006, 10:25 AM
    TxGreaseMonkey
    Here's another link showing your main relay has only a 4 pin connector:

    http://info.rockauto.com/SMP/SMPDetail3.html?RY187.html


    I think you found the main relay and just didn't believe it.

    When you reinstall the main relay, relocate it so it's not so difficult to get to next tine.
  • Dec 2, 2006, 10:34 AM
    CoB_hatecrew
    The one I got was on the driver side like behind and up a little from the hood latch popper... and the numbers don't match on that page to the one I have... every book I looked at locates my main relay on the driver side to the left of the fuse box and up a little
  • Dec 2, 2006, 10:44 AM
    TxGreaseMonkey
    I must have been getting your year Civic confused with someone else's. Your's is on the driver's side, like I originally said in posting #17. Remove the under-dash fuse box cover and the 3 screws to the lower dash panel. The relay is attached with a 10 mm bolt.
  • Dec 2, 2006, 10:48 AM
    CoB_hatecrew
    OK ill be back I'm going to go do that now
  • Dec 2, 2006, 11:34 AM
    CoB_hatecrew
    Well I broke part of my dash but super glue will fix that... now should I test it to see if its bad and see if there is a shot connection or something
  • Dec 2, 2006, 11:54 AM
    TxGreaseMonkey
    I recommend replacing them every 10 years or 120,000 miles, whichever comes first.

    How many pin connector was yours?
  • Dec 2, 2006, 12:08 PM
    CoB_hatecrew
    7 pins mitsuba
  • Dec 2, 2006, 12:10 PM
    TxGreaseMonkey
    Yes, just like mine. I replaced mine with a Mitsuba RZ-0159, which I bought through RockAuto.com.
  • Dec 2, 2006, 12:25 PM
    CoB_hatecrew
    Mine is a RZ-0063
  • Dec 2, 2006, 12:29 PM
    TxGreaseMonkey
    Yes, RockAuto.com has a Mitsuba RZ-0063, RockAuto part no. 39400SH3003, for $36.79+shipping.
  • Dec 2, 2006, 12:50 PM
    CoB_hatecrew
    Mines 48.79 with shipping... 42.79 with out shipping... what's up with that?
  • Dec 2, 2006, 12:52 PM
    TxGreaseMonkey
    Interesting. Maybe you live in a more expensive part of the country and they charge accordingly. I don't know.
  • Dec 2, 2006, 01:10 PM
    CoB_hatecrew
    Still not as expensive as auto zone and advance... they don't even carry them normally and you have to pay more to get them special order... anyway I just want to thank you very much for all your help!
  • Dec 2, 2006, 01:15 PM
    TxGreaseMonkey
    That Mitsuba you are ordering is an OEM part, too. Keep me posted with the results.
  • Dec 2, 2006, 02:15 PM
    CoB_hatecrew
    Well I found out how to test the relay and it is fine... my check engine light is still on and it won't start... n e ideas now? I think the main relay might not be getting a charge from the batery because it doesn't click... but when I tested it directly it clicked... any ideas
  • Dec 2, 2006, 03:06 PM
    TxGreaseMonkey
    With the main relay separated from the connector, turn the ignition on and measure the voltage between main relay connector terminal 5 and body ground.

    Clean the ECM's main ground on the thermostat housing. It has 2 wires going to a heavy duty brass connector, which you should remove and clean with 240 grit abrassive cloth. Spray with WD-40 and refasten.

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