This is what I found out this weekend. The aux fans were eazy to check. All I did was ground the Brown/Gray wire on the temp switch. This confirmed everything in the Aux Fan circuit, including the fan (except the temp switch) was OK. Everything in the circuit was working, My problem was that the radiator was low on coolent. For some reason the radiator will not fully fill from the reservior. I took the top radiator hose off and filled it. This solved my problem.

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Dave