Hitman's Pontiac Trans Am Forum

Trans Am Information => Trans Am Tech => Electrical => Topic started by: shane79ta on July 22, 2012, 08:48:25 PM

Title: 1979 trans am wiring harnesses
Post by: shane79ta on July 22, 2012, 08:48:25 PM

i have a 1979 ta that originaly had a 403 and we are putting a 400 in it. we are going to buy a engion harness for a 400 but will it connect and work with a 403 dash bulk head and if it does work what changes will i have to make. it will also have a four speed, so what will have to change to make the dash harness work.

Title: Re: 1979 trans am wiring harnesses
Post by: solargold on July 22, 2012, 10:55:23 PM

I put a 78 dash harness from a 400 on my 79 with a 400. The only change I needed was the dimmer switch needed an extension to the steering column.

Title: Re: 1979 trans am wiring harnesses
Post by: kc79ta on July 23, 2012, 04:51:40 PM

I think all you should need is the neutral saftey switch jumper over to the clutch switch, and the back drive linkage for a 4 speed so your back up lights work along with your steering lock.