- Jul 18, 2010
- Meridian, ID
I have purchased and am preparing to install an American Autowire Power Plus 20 harness into my carbureted 1973 SBC Swapped 40. The current condition of my harness is bad beyond description. Somehow it ran occasionally and a few things worked intermittently. I’ve thoroughly read the install instructions and completely gone through the existing harness to familiarize myself with the undertaking. The harness directions only call for relays on the horn and electric cooling fan if applicable. Should I run one for the front heater blower as well? Is there anything else that should have one? Thanks for any feedback.