Dash Harness Question

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Feb 18, 2008 | 12:18 PM

bene

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From: Redding California

Dash Harness Question

I am replacing the dash harness on a 1971. It was originally a 4 speed and someone converted it to a TH400 auto. Should I purchase the dash harness for an auto or the original 4 speed. Thanks.

Feb 18, 2008 | 05:56 PM

Alan 71

Team Owner

Joined: Sep 2006

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From: Westminster Maryland

BENE,
I don't think there's a difference between an automatic harness and a 4-speed harness. I believe the only difference is with or without air conditioning. The transmission difference dash harness starts in 1975.
Regards,
Alan

Feb 18, 2008 | 06:16 PM

dmayhew

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From: Brown Summit North Carolina

There is a slight difference in the wires for the bulbs that light up the gear postiion on the shifter.

4 speed harness only has lights for the heater and the lighter.

David

Feb 18, 2008 | 08:53 PM

r3rep

Racer

Joined: Jun 2007

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From: Finger TN

You would think that the harnesses would have to be different due to the backup switch location from auto to manual. Im converting an auto to manual, and have wondered about that. Im going to just build an extension to the trans mounted muncie B/U switch.

Feb 18, 2008 | 09:09 PM

dmayhew

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From: Brown Summit North Carolina

Quote:

Originally Posted by r3rep

The wire that attaches to the trans. plugs into a plug at or near the firewall.

For that reason , I am not sure the auto / manual wire would matter.

Couldn't either one attach to the wire from inside the car?

David

Feb 18, 2008 | 09:31 PM

bene

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From: Redding California

Thanks for the replies. I will purchase the auto version.

Feb 18, 2008 | 10:54 PM

coinwasher

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From: Glen Allen (Richmond) Virginia

I put a new one in my car (4 speed harness) The only difference that I noted was the switch that goes on the clutch pedal linkage. On a four speed car you must push the clutch pedal in to start. On the automatic you have a nutral safety switch.