Cooling Fans not working - again
Chronic Tool Dropper
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Lifetime Rennlist
Member
Joined: Oct 2001
Posts: 20,506
Likes: 566
From: Bend, Oregon
Do the battery terminal cleaning, especially the positive cable and those red aux connections from the battery positive cable. Each fan has a dedicated power lead from the battery, each through a dedicated fuse (28 and 29), to that output module. Possible resistance poiints are the fuse/fuse holder, and the connections at the battery itself.
Had a guest car a couple years ago here that had loose fan wire connections at the battery, causing the fans to run only occasionally. Clean/tighten the wires back there, ran fine.
Also be aware that the hood switch needs to be depressed when testing the fans with the hood open. You can 'force' the controllers to high-speed by connecting the two wires at the thermo-switch on top of the intake manifold. Siimulates a hot-soak condition. Handy when troubleshooting the fans.
Had a guest car a couple years ago here that had loose fan wire connections at the battery, causing the fans to run only occasionally. Clean/tighten the wires back there, ran fine.
Also be aware that the hood switch needs to be depressed when testing the fans with the hood open. You can 'force' the controllers to high-speed by connecting the two wires at the thermo-switch on top of the intake manifold. Siimulates a hot-soak condition. Handy when troubleshooting the fans.
