Question about 1991 Volvo 740

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I tore down the top half of my 91 volvo 740 6mos ago assuming I was just replacing the head/gasket, turbo, etc.. Turned out #1 cyl, and piston were roached; so I pulled the motor and sent it out to a mach shop. I only labeled the injector and stuff that wasn't obvious in how they were routed or distinct in it's connection. I know a long time. The mach shop did great work,and at a great $. Next time I'll take pics during a breakdown. My question mostly concerns the starter wiring. I did mark a med red cable with a small blue lead "starter", and they route to it perfectly. However, there're also heavy red and blue wires that run to that area. Red to starter? Blue to block? If not where? One more? Where do the firewall braided grounds hit the motor. Thanks for the help, my brains ready to implode!!!

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  • sitandstayth Sep 16, 2010

    I get that part, but are both reds going to the starter. Also, what about that heavy blue cable, and the braided ground wires.

  • sitandstayth Sep 16, 2010

    I tore down the top half of my 91 volvo 740 6mos ago assuming I was just replacing the head/gasket, turbo, etc.. Turned out #1 cyl, and piston were roached; so I pulled the motor and sent it out to a mach shop. I only labeled the injector and stuff that wasn't obvious in how they were routed or distinct in it's connection. I know a long time. The mach shop did great work,and at a great $. Next time I'll take pics during a breakdown. My question mostly concerns the starter wiring. I did mark a med red cable with a small blue lead "starter", and they route to it perfectly. However, there're also heavy red and blue wires that run to that area. Red to starter? Blue to block? If not where? One more? Where do the firewall braided grounds hit the motor. Thanks for the help, my brains ready to implode!!!

  • sitandstayth Sep 16, 2010

    vetteman 3002,

    The other red to the block??? That sounds odd, but as soon as you confirm I'll try it. Thanks, for being so specific. I'm psyched to get this thing running. I've replaced everything short of the accessories. The first run is to get tires, and suspension, then trany tune-up. Thanks again!!!

  • sitandstayth Sep 16, 2010

    vetteman 3002, The other red to the block??? That sounds odd, but as soon as you confirm I'll try it. Thanks, for being so specific. I'm psyched to get this thing running. I've replaced everything short of the accessories. The first run is to get tires, and suspension, then trany tune-up. Thanks again!!!

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  • Master
  • 2,299 Answers

The braided ground goes to the top of the intake typically, but all it does really is grounds the body of the car. So it can go anywhere on the engine. As far as the starter wiring goes you are right on that. Red to the starter with the other red and blue to the block.

Posted on Sep 16, 2010

  • Rodney Clark
    Rodney Clark Sep 16, 2010

    No... I am sorry. Red to the starter.

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  • Volvo Master
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BLUE WIRE GOES TO STARTER INHIBITOR SWITCH.STARTER ALREADY GROUNDED TO ENGINE BLOCK.

Posted on Sep 16, 2010

  • Jonah Oneal Sep 17, 2010

    YOU NEED A ELECTRICAL DIAGRAM.OR ASK A VOLVO MECHANIC DOES LOT OF ELECTRICAL WORK.THAT WAY YOU WONT SHORT OUT IGNITION WIRING TO STARTER.

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