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4+3 Electrical Connector Identification

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Old May 3, 2011 | 09:14 PM
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Default 4+3 Electrical Connector Identification

Hello, I am currently replacing the 4+3 in my 85 with a TKO 500. The doug nash has 4 electrical connections on the side and I need to identify which ones do what.

Thanks for the help!
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Old May 3, 2011 | 09:33 PM
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Starting from the front working back on my 86 4+3: First Gear Lockout, Reverse Lights, then Speedometer
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Old May 3, 2011 | 10:24 PM
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Does your tranny only have 3 plugs? Mine has 4.
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Old May 3, 2011 | 10:40 PM
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Put it this way, Mine only had three connections connected.

I just went out and checked and there are only three on mine. One by the 1-2 shifter (middle lever) one above the drain plug (behind the reverse lever) and one on the tail shaft (VSS).

No idea what year my tranny is from (my Vette is a mutt) - it is a an early 86 and I have the TV cable (heard that the 86 on was electrically operated kickdown but mine is an early model). Maybe the other connection is for the kickdown?
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Old May 4, 2011 | 08:37 AM
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Originally Posted by Bucs34
Does your tranny only have 3 plugs?
Mine has 4.
Number of gear position switches on the side cover varied by year ( all had backup switch and VSS )

1984 cars had 3 switches (1st, 2nd, and 4th ).
1985 , 1987, and 1988 cars had a 1st gear switch
and 1986 cars had none.

Last edited by vetteoz; May 4, 2011 at 08:39 AM.
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Old May 4, 2011 | 08:47 AM
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Originally Posted by Bucs34
Does your tranny only have 3 plugs? Mine has 4.
Overdrive solenoid could be the fourth.
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Old May 4, 2011 | 09:26 AM
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For the TKO I only need to figure out witch plugs are for the speedometer and the reverse light. I would love to see a picture that labels each connector.
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