Difference between 1956 & 1957 under dash wiring harness?

[Ari]

I came across an underdash wiring harness for a 1956 V8 car. My car is a 1957.

Is there any significant difference between a 1956 & 1957 harnesses?

[acardon]

I came across an underdash wiring harness for a 1956 V8 car. My car is a 1957.

Is there any significant difference between a 1956 & 1957 harnesses?

Yes, they are different in several areas. The light switches and ignition switchs are different. There is a single plug on the 57 light switch and individual plugs on the 56. The 56 ignition switch has 2 "ign" terminals but the 57 has only 1. The fuse box is different. The dash lights have the fuse on the light switch on a 56 and on the fuse box on a 57.

[Ari]

As always, thanks for the info and quick response. Sounds like using the '56 harness I have is out of the question for my '57.