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NISSAN Pictures of how I rewired the interlock relay on my 87-95 Nissan Pathfinder with manual transmission.


After 10 or more years in service, the Pathfinder suffers a common starting problem. I would turn the key and it made a clicking noise but the engine wouldn't turn over. I'd turn the key a few times and then it would catch and run fine. I tested the battery and alternator, both fine. I cleaned all the corrosion off the battery and replaced the corroded ground cable, but this didn't help.

First I replaced the relay. The new switch didn't help much, so maybe the fault is in the old wiring, and not the switch. Therefore I rewired the relay directly to the battery.

But first, lets pay some bills:
  1. I read Mr. Reverse's auto trans wiring fix, and applied the same principle to my manual transmission.


  2. I connected interlock-relay directly to battery. The wiring from the ignition switch is corroded or loose. This modification gets juice directly from the battery to the relay to the starter. This skips the ignition switch, and only uses the ignition switch for activating the relay.
    Nissan Pathfinder Starter Relay Modified Wiring Diagram Fixes Some Starting Problems


  3. I figured out which wire is which on the relay.
    Since I had already replaced the relay, I don't know what number it originally was hooked to. So to find which wire was which:
    1. I put the car in neutral!!!
    2. I put the key in the ignition to "on."
    3. Disconnected the thick relay wires (87 & 30).
    4. Touched the wires from the relay (one at a time) directly to the (+) battery terminal.
    5. When the starter cranked, I knew that wire went to the starter.
    6. LABELED IT!


  4. I bypassed to battery.
    1. I hooked that wire I just labeled back up to the interlock relay on # 87.
      (Theory: ok, could go 87 or 30, just not on magnet 85, 86).
    2. I hooked up a thick wire directly to the battery.
      (I used 4 gauge because I had it.  I hear 10 gauge is fine).
    3. The other end to interlock relay switch terminal 30.
    4. The thick wire that I just replaced with the wire from the battery: tape it up and tuck it in and tape it down.
    Dammit, that still didn't fix it, so finally I replaced the ignition switch, that's where I turn the key by the steering wheel.


  5. Next I prostituted myself to make 02ยข so I can fulfill my lifelong dream of owning a 1994 300ZX with ruined body work. Or perhaps that nice 1982 380SEC with no interior. Maybe even, dare I think it, a 2003 Subaru with a blown engine.

    But no minivans!


  6. Then I finished my beer.
    Beer


Comments


bret nelson wrote ( 4/12/2008 1:00:51 PM )


Garage wrote ( 4/12/2008 4:09:22 PM )


bret wrote ( 4/16/2008 5:58:26 PM )


Garage wrote ( 4/16/2008 9:16:43 PM )


RC wrote ( 11/15/2008 2:07:02 PM )


Garage wrote ( 11/18/2008 5:41:56 PM )


Zombro wrote ( 6/29/2009 6:32:48 AM )


Jacob wrote ( 7/31/2010 10:36:56 PM )


Jacob wrote ( 7/31/2010 10:41:37 PM )


Garage wrote ( 8/3/2010 6:20:20 PM )


PAT wrote ( 2/13/2012 3:06:33 PM )


PAT wrote ( 2/13/2012 3:07:27 PM )


Garage wrote ( 3/1/2012 8:54:25 AM )


PAT wrote ( 3/5/2012 1:43:06 PM )


Jimmie wrote ( 7/6/2014 10:53:54 AM )


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