Question about 1993 Chevrolet S-10 Blazer

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Broken wire some sort of junction on fire wall center left above engine

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Hello! Need to know; Year, make, and model of vehicle...And the color of the wire that is broken...


Posted on May 29, 2010

  • 15 more comments 
  • johneverett5 May 29, 2010

    1993 chevy s10 blaser

  • johneverett5 May 29, 2010

    1993 chevy s10 blaser orange wire which turn to black by way of some sort of link

  • David Burbee
    David Burbee May 29, 2010

    Hello! Need the wire color to solve...Can you also tell the gauge?..............saailer

  • David Burbee
    David Burbee May 29, 2010

    thanks for the color.......I'll let you know shortly..........saailer

  • johneverett5 May 29, 2010

    smaller guage 12 14 16

  • David Burbee
    David Burbee May 29, 2010

    Thanks for the color....I'll go to work on problem...........Saailer

  • David Burbee
    David Burbee May 29, 2010

    Hello! the Orange wire carries +12 volts to the oil pressure switch and a normally open contact on the fuel pump relay...It continues to the ECM connector E pin# 16...The power comes from a fusible link
    (hot at all times)...That change in color is the fusible link...

    What symptoms does the vehicle have? Saailer

  • johneverett5 May 30, 2010

    no start

  • David Burbee
    David Burbee May 30, 2010

    Hello! Can you see where the break is; Other end of wire? You've lost the fuel pump relay...Does the end of the Orange wire have +12 volts on it? If so you have the end that connects to the fusible link...You need to search for the other end...And splice it together...I know that sounds simple but you need to open up the harness and look for the break...Open wires in a harness are one of the most difficult problems to solve...However, you are in-luck because you have one end...Carefully **** the harness cover with a razor blade and look for the break...When you find it, splice it with a similar gauge wire...

    Let me know what you find....................Saailer

  • johneverett5 May 30, 2010

    wire is hot , ecm connector e pin#16 you lost me ?

  • johneverett5 May 30, 2010

    that junction block on fire wall is where the orange wire is connected and turns to black about 4 inches down and then i have about 6 inches of black wire

  • David Burbee
    David Burbee May 30, 2010

    Hello! The junction is the connection to the fusible link...Good news, in that the orange is hot...Fusible link is OK...Forget the comment, for now, concerning the ECM...It is the rest of the multiple...

    The 6" of black more than likely has no power...It's not easy to understand what you are seeing...Please do not be offended; I may ask questions that seem overly simple..

    Do you see an obvious break; Sounds like you have two ends of black wire that should be connected to each other? Is there a missing piece, a large gap between two ends?

    Lastly, are you sure the black wire isn't a dirty Gray? We are very close to a solution...I'll wait for an answer.................Saailer

  • johneverett5 May 30, 2010

    that junction block which i call it on the fire wall has two studs lower one has three wires connected to it,they are about 8 10 guage wires one has a in line fuse 20 amp the top stud is the wire that starts out orange and turns to black and thats the end hanging loose and the break looks clean

  • David Burbee
    David Burbee May 30, 2010

    Hello! Is there +12 volts on the lower stud; The junction point of three Orange wires? Is there +12 volts on the upper stud? At the point where the upper stud Orange wire turns to Black, is it a spliced-in Black wire?

    Are you the original owner? It's beginning to look as if the change, in color, from Orange to Black isn't factory...And somewhere in the neighborhood of that black wire, which is not connected, is where it used to be connected..Has the truck been running fine and just now won't start?

    Hot at all times power is fed to the Orange wire via the in-line 20A fuse...The junction block on the firewall multiples that power to; #1 Fuel pump relay...#2 The fuel pump oil pressure switch...And # 3 to connector E pin-16 on the ECM...One of these runs is open...All factory runs are Orange...None are Black...

    If you can not locate the point where the Black wire broke away, we'll find the missing run with an ohm meter...Get back to me, I'll be on-line until you call it quits...I am here! Saailer

  • johneverett5 May 31, 2010

    wires on lower stud are not orange they appear to be red top stud where orange to black wire is hot and appears to be factory the black barrel looking thing is hard rubbber and molded to the wire that is where the wire color changes sorry dont have multi-meter here will have one tommorow morn.

  • David Burbee
    David Burbee May 31, 2010

    Hello! Broken wire carries +12 volts to three points via a multiple...
    #1 Oil pressure switch...2 wire conn....Orange and Gray...Passenger side of block...Lower engine area...Above oil pan...Mounted in block...

    #2 Fuel pump relay...4 wire conn...Orange...Gray...Black/White...And Dark Green/White...Front seat area drivers side of steering column...Behind instrument cluster...Mounted in convenience center

    #3 PCM connector C1...Pin#16...Only Orange wire...Do not disconnect PCM connectors...Use paper clip through rear of connector...IGNITION OFF...

    Check all three points for +12 volts (hot at all times)...I doubt +12 is there...If no Battery is present on any of these three points...Check all three for continuity...All three should read together...

    If there isn't Battery on this multiple and all three read to each other; The broken Black wire needs to be jumped to the most convenient point of this multiple...But before you do that tell me what you find...


  • David Burbee
    David Burbee Jun 04, 2010

    Hello! Have not heard from you...Did you test the multiple for +12 volts and continuity?



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