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Old 04-02-2019, 07:11 PM   #1 (permalink)
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Join Date: Aug 2013
Location: Snohomish, WA
Posts: 12
Default IMA Battery Coolinh Fan

HI all -

I've researched the forum and found some posts, but none that seem to align with the details of my issue.

I own 3, 2000, Insight's. all of them have new batteries from Bumblebee / Eli - and grid charges from Hybrid Automotive.

I just installed the a new wire harness for the grid charger in the 3rd Insight.

At Step #22 you test the system. As I mentioned, this is the 3rd grid system from them I've installed. The installation is pretty straightforward.

At this point I ran into an issue. The fan would just "pulse" and the grid charger wouldn't turn on. I did some basic troubleshooting to confirm there is 13.7v at the end of the Blue / Yellow wire taps going to the fan. If I disconnect the fan (clip the blue or yellow wire) the grid charge turns on and charges correctly.

At this point I was about 100% sure the fan was dead. I was planning to order a new one.

I fired up the car to move it out of the shop and - surprise, the fan came right on and everything seems to be fine. So now... I'm thinking something must be wrong with the grid charging cable. I called Hybrid Automotive. They are very helpful - we did some basic investigation and pretty much determined the cable is probably fine.

So - the question... Has anyone seen this behavior before? The fan "pulsing" seems to be a known failure mode, but it's only doing that when powered from the grid charger. When I turn on the car it seems to work fine?

Just looking for any tips / guidance.

thanks in advance!
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Old 04-02-2019, 07:38 PM   #2 (permalink)
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Join Date: Jan 2011
Location: Eastern CT
Posts: 490
Default IMA Battery Coolinh Fan

I don't have any experience with the Hybrid Automotive charger and harness, but...

I did build a harness and charger for my 2000. And I later installed an aftermarket battery cooling fan. Just to say, I know something of what I'm talking about here.

I expect you're using one charger for all three cars. I'd test that charger in your other two cars and see how it behaves.

You've pretty well confirmed the harness is ok, so I'd suspect trouble either in the charger or in the car's circuit. I doubt that for the charger's fan harness relies on anything in the car itself, aside from a few inches of wire and the fan. So that leaves the charger. Try it in the other cars and see if it still works there.
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