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1973 chevy truck wiring diagram

I have a 1975 chevy C30. It has a odometer in the dash. the wiring harness has 3 wires going into the odometer. Black (gnd),Pink (fuse panel) and a brown wire which I must of unhooked when I swapped engines.Where does the brown wire go to?

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  • Cars & Trucks Master
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The odometer uses the same cable the speedometer uses. It should be mechanical.
Now the HEI coil has two pinks and a brown. One pink goes to the pickup in the bottom of the distributor and the other pink goes to the key switch. The brown goes to the pickup or the ignition module in the distributor.

Posted on Jul 15, 2013

  •  Stephen
    Stephen Jul 15, 2013

    And on some trucks there is a brown wire that goes from the tach to the coil.

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SOURCE: Need engine harness wiring diagram for 2001 chevy truck V8

The Best diagram you can get is at alldatadiy.com it has the sections and locations and color of wires with pictures.

Posted on Aug 20, 2009

emissionwiz
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SOURCE: connecting wiring from jeep to buick engine

Sorry but we have no wiring diagrams on either car.

Posted on Aug 30, 2012

skychief2001
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SOURCE: 1990 Chevy GMC Suburban alternator wiring

Well, according to my diagrams for 88-94 models, the alternator only uses the red and brown. There are pink-black wires that power some of the sensors and solenoids but should go to a fuse marked ECM in the fuse box.
Have you tried hooking up the harness without using the pink-black wire ?

Posted on Aug 30, 2012

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Thanks for using FixYa - a FixYa rating is appreciated for my effort in answering this Freebie question.

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