ZR-1 Net Registry Forums - View Single Post - C68 HVAC Programmer Compatibility for 1990

S.hafsmo · 08-23-2021

They are indeed different, but you'd might be able to use a later programmer on a 90 with some modifications. If I recall correctly, the early cars have a different AC request signal, which can be rectified with a relay.

08-23-2021	#2
S.hafsmo Join Date: Nov 2016 Location: Norway Posts: 397	Re: C68 HVAC Programmer Compatibility for 1990 They are indeed different, but you'd might be able to use a later programmer on a 90 with some modifications. If I recall correctly, the early cars have a different AC request signal, which can be rectified with a relay. __________________ - '90 ZR-1 Last edited by S.hafsmo; 08-23-2021 at 12:21 AM.