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-   -   1995 civic won't start up (https://www.askmehelpdesk.com/showthread.php?t=253451)

  • Aug 28, 2008, 08:50 PM
    malink
    Mmm... what fuse are you talking about when you say fuse #31

    http://img.photobucket.com/albums/v3...ooddiagram.jpg
  • Aug 28, 2008, 08:57 PM
    TxGreaseMonkey
    There should be 4 fuses along the back row of the under-hood fuse box. Fuse No. 31 is the 15 amp fuse on the left. It controls power to the PGM-FI Main Relay.

    On your photo, it says 15A ECU.
  • Aug 28, 2008, 09:05 PM
    malink
    Just checked it... was working fine

    I put a new one in just to be sure... still nothing
  • Aug 28, 2008, 09:06 PM
    TxGreaseMonkey
    Is the 7.5 amp Starter Signal fuse in the under-dash fuse box good?

    I always use a test light or multimeter to test power "through the fuse" (both test points), when the ignition is turned to ON. Have you done this?
  • Aug 28, 2008, 09:08 PM
    malink
    Yep just changed it and I did checked all fuses with the key turned on and there all OK
  • Aug 28, 2008, 09:17 PM
    TxGreaseMonkey
    Since all fuses test fine, I'm inclined to suspect the ignition switch, since you are not getting power to Terminal 6 of the main relay connector. Still, I don't understand why jumping Terminals 5 and 7 doesn't cause the fuel pump to run, when the ignition switch is turned to ON. It's either the ignition switch, again, or the fuel pump is bad. If it's the fuel pump, it will be the first Honda fuel pump that I've seen be bad.
  • Aug 28, 2008, 09:21 PM
    malink
    Fuel pump is fine because I just checked it... I hookep it up to a batterie and it ran fine.

    If I change the ignition switch, do I have to get a new key?

    One thing I don't understand... why can I hear all 3 clicks if the ignition switch is messed up?
  • Aug 28, 2008, 09:25 PM
    TxGreaseMonkey
    No, you don't need to get a new key at all--just the switch and harness. They normally cost around $65.
  • Aug 28, 2008, 09:27 PM
    malink
    I hope your right... ill go to the scrapyard tomorrow and we'll see from there

    But I still don't understand how it can be faulty since ALL electrical on the car are working fine (ecu, radio, light etc... )
  • Aug 28, 2008, 09:32 PM
    TxGreaseMonkey
    Don't buy one yet. Check out the old one first:

    https://www.askmehelpdesk.com/cars-t...tml#post224652

    Look for visible signs of wear, pitting, or melting.

    Your switch may work on Position II but not when it's turned to START. You just need to check it out first. Other than this, I don't know much else to suggest. It's obvious you have a power issue. The only other option is to start performing continuity checks on the wiring harness.

    The ignition switch and harness plugs into the Main Harness and into the under-dash fuse box.
  • Aug 28, 2008, 09:36 PM
    TxGreaseMonkey
    Is your new main relay an exact match to the old one?
  • Aug 29, 2008, 04:02 AM
    malink
    No but the one I got at the dealship is the new one... but with a different code

    Anyway I've check the ignition switch and everything seems fine... no melting or sign or failure

    One my friend who works at honda might come today to check the bloody wiring (he think that the fuel pump isn't getting power)
  • Aug 29, 2008, 01:10 PM
    malink
    Wich wire connext the fuel pump to the main relay?

    Ill try something tonight... ill just put a brand new wire from the really to the fuel pump but first I need to ned wich connections if the fuel pump in the main relay connector (dont ask me about the colors... I'm color blind)
  • Aug 29, 2008, 02:33 PM
    TxGreaseMonkey
    Terminal 7 goes to the fuel pump.
  • Aug 29, 2008, 02:55 PM
    malink
    Is there a way I can check if I get 12 volts to the connector and then check the wire... before I start cutting I want to check everything
  • Aug 29, 2008, 03:08 PM
    malink
    OK here are the results... I put the positive behind the connector with the fule pump wire and when I turned the key to on I got my 12 volts with the clicks

    But when I want at the end of the fuel pump pulg and did the same test.. I got 0 volts

    So should I just trhwo a new wire?
  • Aug 29, 2008, 03:12 PM
    TxGreaseMonkey
    I think you should wait until your Honda friend can look at it for you. What I previously posted would not work, which is why I deleted it.
  • Aug 29, 2008, 03:15 PM
    TxGreaseMonkey
    Disconnect the main relay connector.

    1. Check for continuity between connector terminal 2 and body ground. If none, repair an open in the wire between the main relay and the main relay ground at the thermostat housing.

    2. What voltage do you get when you measure the voltage between connector terminal 1 and body ground? If none, repair an open in the wire between the main relay and the ECU (15 A) fuse.

    I'm still convinced you have a problem getting battery voltage to the main relay.
  • Aug 29, 2008, 03:22 PM
    malink
    I get 12-13 volts
  • Aug 29, 2008, 03:29 PM
    TxGreaseMonkey
    That's good. Check for continuity between connector terminal 2 and body ground. If none, repair an open in the wire between the main relay and the main relay ground at the thermostat housing.

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