Don't know why, but the fuse for the 87 300D keeps melting. The aux fan seems to run all the time, which I don't think is correct. I put a 25 amp fuse in, as some have suggested, but I am wondering why it was blowing in the first place? The fan spins freely, and the connector is fine.

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87 300D - Running on Veggie oil; 260,000 plus miles; Original #14 head