Cooling Fan Motor failure, with fusible link failure

[VetteMed]

I recently noticed that the A/C wasn't working well at slow vehicle speeds, and while I can accept that there's some reduced efficiency in such cases, yesterday the cooling was essentially nonexistent at a long stoplight.

Some troubleshooting this morning revealed that the secondary cooling fan is not operating. As per the FSM, checking for power at the large red power lead to the secondary relay, did NOT illuminate the test light.

I jumped the red power lead from the primary fan relay connector, to deliver 12v to the pink/black wire leading to the secondary fan, and it ran, but noisily and slowly. So, I think the secondary fan motor probably began to fail, was drawing too much current, and blew the fusible link.

I removed the battery, removed the nut off of the "jump starting terminal", and examined all of the fusible links. Here's what I found:



The FSM is vague about these fusible links, luckily the failure was visible. The two fan power fusible links are ganged together on one ring terminal. I'm going to replace both fan motors (they are both original), and both fusible links.