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

Axial · 09-14-2021

Update:

Exchanged a few emails with Batee, who was super helpful (thank you!).

So far, it looks like the big diode smack in the middle of my C68 programmer module's main board is toast; you can see the the charred bits through the conformal coating. In-process of yanking it off to do a proper test on it (had to go acquire some soldering braid) but it's not a diode that's included in the rebuild kit as it's not one of the ones that typically goes poof. Batee says any of the kit diodes ought to work in its stead, but I'm hoping it has a number on it so I can track down a form-fit-function replacement.

Batee did say he has never seen the part number I mentioned my unit shows in the OP for the ZR-1 before, but it is definitely there and printed on the sticker. Given how it was missing its single-use retainer on the vacuum block, missing its cardboard backing, and held to the firewall with entirely the wrong bolt, I'm going to go out on a limb and say this unit is a rebuilt mutt featuring the outer shell from a later car with the innards of the appropriate vintage (it is an "old-style" board, as it should be). The cork sound dampers on the vacuum solenoids are also in fantastic shape, which I wouldn't expect on an almost 32-year-old example with 76k miles.

09-14-2021	#6
Axial Join Date: Aug 2021 Location: Manassas, VA Posts: 15	Re: C68 HVAC Programmer Compatibility for 1990 Update: Exchanged a few emails with Batee, who was super helpful (thank you!). So far, it looks like the big diode smack in the middle of my C68 programmer module's main board is toast; you can see the the charred bits through the conformal coating. In-process of yanking it off to do a proper test on it (had to go acquire some soldering braid) but it's not a diode that's included in the rebuild kit as it's not one of the ones that typically goes poof. Batee says any of the kit diodes ought to work in its stead, but I'm hoping it has a number on it so I can track down a form-fit-function replacement. Batee did say he has never seen the part number I mentioned my unit shows in the OP for the ZR-1 before, but it is definitely there and printed on the sticker. Given how it was missing its single-use retainer on the vacuum block, missing its cardboard backing, and held to the firewall with entirely the wrong bolt, I'm going to go out on a limb and say this unit is a rebuilt mutt featuring the outer shell from a later car with the innards of the appropriate vintage (it is an "old-style" board, as it should be). The cork sound dampers on the vacuum solenoids are also in fantastic shape, which I wouldn't expect on an almost 32-year-old example with 76k miles.